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Journal Cover The Agriculturists
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  This is an Open Access Journal Open Access journal
   ISSN (Print) 1729-5211 - ISSN (Online) 2304-7321
   Published by Bangladesh Journals Online Homepage  [109 journals]
  • Production and Price Relationship of Ginger (Zingiber officinale) in
           Bangladesh: A Distributed Lag Model

    • Authors: Md. Kamrul Hasan, Md. Mojammel Haque, Md. Golam Rabbani
      Pages: 01 - 09
      Abstract: The study aimed at analyzing the fluctuation, and production-price relationship of ginger in Bangladesh. Nineteen years (1975 to 2013) time series data of area, production and prices of ginger, collected from Bangladesh Bureau of Statistics were used to analyze the simplest method for fluctuation, and the Koyck model of distributed lag. The extent of annual price fluctuation of ginger ranged between -50 to 63 percent, while the fluctuation of area, production and yield ranged between-5 to 13, -17 to 22 and -20 to 11 percent, respectively. The study revealed that ginger production in Bangladesh had been influenced by the average price lag value formed in the market. The most striking result of the study was that the time required to get an effect on ginger production for the changes of ginger prices in Bangladesh was 19.83 years. This result shows that the farmers are very enthusiastic for growing ginger, the widely grown major spice crop. The correlation/regression coefficients indicated that the changes in lag values of the prices had a positive influence on production. It may be recommended that to keep the ginger price fluctuation under control, sustainable ginger farming and establishment of an efficient marketing organization is necessary.The Agriculturists 2017; 15(1) 01-09
      PubDate: 2017-08-04
      DOI: 10.3329/agric.v15i1.33423
      Issue No: Vol. 15, No. 1 (2017)
       
  • Leaf Blight Disease caused by Pseudomonas syringae pv. syringae in the
           Nurseries of Litchi (Litchi chinensis Sonn.) and its Management

    • Authors: MAH Khan, I Hossain, MU Ahmad, MSM Chowdhury
      Pages: 10 - 18
      Abstract: Leaf blight of seven varieties of litchi caused by Pseudomonas syringae pv. syringae was surveyed in the nurseries of major litchi growing areas in Bangladesh viz. Rajshahi, Dinajpur, Rangpur, Mymensingh and Khagrachari. The mean level of incidence and severity were 8.58 and 7.88% in Rajshahi, 9.88 and 8.88% in Dinajpur, 8.44 and 7.76% in Rangpur, 6.50 and 6.18% in Mymensingh and 9.00 and 7.98% in Khagrachari. Incidence and severity of bacterial leaf blight disease of litchi varied significantly depending on weather conditions. Correlation studies revealed that bacterial leaf blight disease of litchi seedlings were positively correlated with temperature, rainfall and relative humidity, where temperature and rainfall was the major factor to the variations of both incidence and severity. Antibiotic sensitivity test revealed that among fifteen isolates, most of the isolates of P. syringae pv. syringae collected from litchi were sensitive to Gentamycin and Erythromycin. Under net house condition, six different treatments (i) Gentamycin @ 0.05%, (ii) Erythromycin @ 0.05%, (iii) Doxycycline @ 0.05%,(iv) Copper sulphate @ 0.05%, (v) BAU-Biofungicide @ 2% and (vi) Control were used for controlling bacterial leaf blight of litchi (Variety: China-3). BAU-Biofungicide was found to be superior in controlling bacterial leaf blight of litchi that reduced 33.64% disease incidence and 60.77 % disease severity in 2010-11 and 63.76% disease incidence and 61.40 % disease severity in 2011-12 over control when applied as foliar spray @ 2% followed by Copper sulphate (0.05%) and Erythromycin (0.05%).The Agriculturists 2017; 15(1) 10-18
      PubDate: 2017-08-04
      DOI: 10.3329/agric.v15i1.33424
      Issue No: Vol. 15, No. 1 (2017)
       
  • Irrigation Scheduling of Rice (Oryza sativa L.) Using CROPWAT Model in the
           Western Region of Bangladesh

    • Authors: MB Hossain, S Yesmin, M Maniruzzaman, JC Biswas
      Pages: 19 - 27
      Abstract: Understanding of crop water requirement is essential for irrigation scheduling and selection of cropping pattern in any particular area. A study was conducted to estimate irrigation requirement and made irrigation scheduling of T. Aman (wet season) and Boro (dry season irrigated) rice in the western region of Bangladesh using CROPWAT model. Historical climate data from three weather stations in the region along with soil and crop data were used as input to FAO Penman-Monteith method to estimate reference evapotranspiration (ETo). Effective rainfall was calculated using USDA soil conservation method. The model estimated1408 mm annual ETo in the study area, of which the highest amounts of 175 mm was in April and the lowest (70 mm) in December. The average annual rainfall was 1592 mm of which 986 mm was effective for plant growth and development. The model estimated ETc of BRRI dhan49, which was 473 to 458 mm, depending on its transplanting dates from 15 July to 15 August. Rice transplanted on 15 July required no irrigation, whereas three supplemental irrigations amounting 279 mm were required for transplanting on 15 August. The CROPWAT model estimated seasonal irrigation water requirement of 1212 mm (12 spilt applications) for BRRIdhan28 transplanted on 15 January. This model has also a potentiality to make irrigation scheduling of other crops. The Agriculturists 2017; 15(1) 19-27
      PubDate: 2017-08-04
      DOI: 10.3329/agric.v15i1.33425
      Issue No: Vol. 15, No. 1 (2017)
       
  • Resource Use Efficiency and Factors Affecting Land Allocation for Wheat
           (Triticum aestivum L.) Production in Bangladesh

    • Authors: Basanta Kumar Barmon, Mahfuzul Islam
      Pages: 28 - 39
      Abstract: The present study aimed to estimate the resource use efficiency and identify the factors affecting land allocation for wheat production in Bangladesh. Primary data were randomly collected from 183 wheat producers from three Upzillas of Natore district. The results revealed that farmers had experienced decreasing return to scale in wheat production. Farm area, seed cost and labor cost were the main factors that positively, and irrigation negatively affected wheat production. The sampled farmers failed to show their efficiency in using the resources in wheat cultivation. There was further opportunity to increase wheat production using more seed, chemical fertilizers, manure and pesticides. However, there was no further scope to increase wheat production by using irrigation, land preparation and labor inputs. The study also revealed that farmers’ age, education, wheat farming experience, location and family size significantly affected the probability of land allocation in wheat production. Soil type in the study areas played a vital role in the decision process of wheat cultivation. It could be concluded that proper utilization of inputs can increase wheat in Bangladesh.The Agriculturists 2017; 15(1) 28-39
      PubDate: 2017-08-04
      DOI: 10.3329/agric.v15i1.33426
      Issue No: Vol. 15, No. 1 (2017)
       
  • Performance Evaluation of BRRI Power Weeder for Low Land Rice (Oryza
           sativ
    L.) Cultivation

    • Authors: AKM Saiful Islam, MT Islam, M Sh. Islam, AKM Lutfor Rahman, MA Rahman
      Pages: 40 - 48
      Abstract: Mechanical intervention in crop production is increasing rapidly in Bangladesh. Researchers are finding ways to manage weeds in rice field using suitable mechanical devices instead of conventional hand weeding. A study was conducted to evaluate the field performance of BRRI (Bangladesh Rice Research Institute) power weeder compared to BRRI weeder and hand weeding in the farmers’ field at Rashidpur in Mithapukur upazila under Rangpur district during boro season of 2014-15. Three treatments: T1 = BRRI weeder (BW), T2 = BRRI power weeder (BPW) and T3 = Hand weeding (HW) were used in the experiment. The experiment was carried out in a randomized complete block design (RCBD) and replicated in four farmers’ plots. Rice variety BRRI dhan28 was selected for the experiment. The effective field capacity of BW and BPW was found to be 0.06 and 0.09 ha hr-1, respectively. The weeding efficiency was the highest in HW (92%), followed by BPW (78%) and BW (73%). It was found that BW damaged the lowest number of plants (9%) compared to BPW (11%) during weeding operation, although the damaged plants recovered after a few days. BW and BPW reduced 74 and 85% of labor requirement in weeding operation compared to HW. The highest weeding cost was involved in HW (Tk. 4287 ha-1) compared to BW (Tk. 1103 ha-1) and BPW (Tk. 950ha-1). Weed control methods exerted insignificant effect on grain yield. BRRI power weeder and BRRI weeder reduced weeding cost, enhanced weed control and improved the labor efficiency without sacrificing grain yield. The highest BCR was obtained in BPW (1.22) followed by BW (1.16) and HW (1.11). BRRI power weeder and BRRI weeder appeared to be economic, easy and also environmentally safe weed control device in low land rice cultivation. The Agriculturists 2017; 15(1) 40-48
      PubDate: 2017-08-04
      DOI: 10.3329/agric.v15i1.33427
      Issue No: Vol. 15, No. 1 (2017)
       
  • Evaluation of Some Management Options against Brinjal (Solanum melongena
           L.) Shoot and Fruit Borer (Leucinodes orbonalis [Guenee])

    • Authors: Sharmin Akter, MZ Alam, MM Rahman, AM Akanda
      Pages: 49 - 57
      Abstract: A field study was conducted to find out the effectiveness of five management options: i) Bacillus thuringiensis (Bt), ii) Tracer 45 SC (Spinosad), iii) Proclaim 5 SG (Emamectin benzoate), iv) mechanical control, and v) untreated control for suppressing brinjal shoot and fruit borer (BSFB) during-2012 at Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU). The treatments were arranged in a randomized complete block design with four replications. Results indicated that Tracer 45 SC performed the best in reducing 85.60% shoot infestation over control, which was followed by Proclaim 5 SG (76.62%), Bacillus thuringiensis (66.41%) and mechanical control (22.02%). The best performance of fruit infestation reduction over control by number and by weight was also obtained in Tracer 45 SC treated plots and reduced  88.80 and 89.46%, respectively. This was   followed by Proclaim 5 SG (65.58 and 67.29%), Bacillus thuringiensis (52.63 and 54.28%) and mechanical control (31.88 and 19.04%). The highest yield of 11.20 t ha-1 and highest benefit cost ratio of 5.32 were recorded in Tracer 45 SC treated plots.The Agriculturists 2017; 15(1) 49-57
      PubDate: 2017-08-04
      DOI: 10.3329/agric.v15i1.33428
      Issue No: Vol. 15, No. 1 (2017)
       
  • Effect of N, P and K fertilizer on the flower yield of Chrysanthemum

    • Authors: R Ahmed, MJ Hussain, S Ahmed, MR Karim, MA Siddiky
      Pages: 58 - 67
      Abstract: An experiment was conducted at the research field of Horticulture Research Centre, BARI, Gazipur during Rabi season of 2012-13 to 2014-15 to evaluate the response of different doses of N, P and K on the yield and yield attributes of chrysanthemum (var. BARI Chrysanthemum-1) and to find out the optimum and economic doses of NPK for maximizing yield of chrysanthemum. Treatments comprising four levels each of N (0, 100, 150 and 200 kg ha-1), P (0, 50, 75 and 100 kg ha-1) and K (0, 90, 135 and 180 kg ha-1) along with blanket dose of 2 kg B and 4 kg Zn ha-1 were used. The treatments were assigned in a randomized complete block design with three replications. The combined effect of NPK significantly increased yield and yield attributes of chrysanthemum for each of the yearly experiments as well as the average of three years results. Significantly, the highest flower yield (12.45, 11.47 and 11.96 t/ha) was obtained with the application of N150P75K135 kg ha-1 (T3) along with blanket dose of 2 kg B and 4 kg Zn ha-1 for the years of 2012-13, 2013-14 and 2014-15, respectively and it was statistically identical with T4 (N200P75K135 kg ha-1) treatment. Application of 150 kg N, 75 kg P and 135 kg K increased yield by 52.76, 42.29 and 36.51%, 152.08, 126.23 and 99.13% and 88.35, 51.30 and 60.75%, respectively, over their control in respect to the years. The highest benefit-cost ratio 5.54 followed by 5.14 was obtained from T3 (N150P75K135 kg ha-1) followed by T4 treatment, respectively. From the quadratic regression equation averaging three years data the optimum and economic doses 155 and 151.8 kg N, 79.3 and 77.68 kg P and 118.75 and 115.7 kg K, respectively were found which could be recommended for chrysanthemum production in Grey Terrace Soil of Joydebpur under AEZ 28.The Agriculturists 2017; 15(1) 58-67
      PubDate: 2017-08-04
      DOI: 10.3329/agric.v15i1.33429
      Issue No: Vol. 15, No. 1 (2017)
       
  • Climatic Variability and Wet Season Rice (Oryza sativa L.) Production in
           North-West Bangladesh

    • Authors: JC Biswas, MB Hossain, AK Choudhury, N Kalra, M Maniruzzaman
      Pages: 68 - 80
      Abstract: Climate change is influencing rice (Oryza sativa L.) production in some agro-ecological regions of Bangladesh. The impact of seasonal climatic variability on rainfed lowland rice (transplanted aman or T. Aman) yield in north-west Bangladesh was analyzed based on historic weather data from 1971 to 2010. Wet season maximum and minimum temperatures were increasing by 0.0174 and 0.0083°C year-1, respectively. Sunshine hours for the same   period have decreased by 0.0259-0.027 hr year-1. The representative concentration pathway (RCP) based projection showed increased maximum and minimum temperatures by 0.42-1.51 and 0.79-1.34°C, respectively in 2050. T. Aman rice yield could be reduced by 0.17-0.37 t ha-1 if temperature rises by 1°C. If sunshine hour decreases by 1 hr, yield reduction could be 0.20 t ha-1. Combined effect of increased minimum temperature and decreased sunshine hours will govern T. Aman rice yield in future.The Agriculturists 2017; 15(1) 68-80
      PubDate: 2017-08-04
      DOI: 10.3329/agric.v15i1.33430
      Issue No: Vol. 15, No. 1 (2017)
       
  • Effect of Polyethylene Glycol Induced Water Stress on Germination and
           Seedling Growth of Wheat (Triticum aestivum)

    • Authors: MS Rana, MA Hasan, MM Bahadur, MR Islam
      Pages: 81 - 91
      Abstract: The performance of twenty wheat genotypes under Polyethylene Glycol (PEG) induced water stress during germination and early seedling growth stages were tested under three levels of water potential i) Control (Tap water), ii) -2 bars and iii) -4 bar at the Crop Physiology and Ecology Laboratory of Hajee Mohammad Danesh Science and Technology University, Dinajpur during September 2014 to October 2014. Rate of germination and vigor index of all wheat genotypes were delayed with the increment of water stress induced by PEG. Shoot and root lengths and seedling dry weight of 10 days old seedlings were found to be reduced due to the increment of water stress. However, the degree of reduction of these parameters with the increment of water stress was not similar for all wheat genotypes. Stress tolerance index (STI) based on seedling dry weight indicated a wide difference in stress tolerance among the wheat genotypes. At moderate water deficit stress, BARI Gom 25, E 34, E 28 and BAW 1170 showed more stress tolerance and the wheat genotypes- Sourav, E 23 and BAW 1140 showed greater stress sensitivity than the other wheat genotypes. At higher water deficit stress, BARI Gom 25, BARI Gom 28, E 28 and BAW 1170 showed more stress tolerance and the wheat genotypes- Satabdi, Sourav, BARI Gom 26, E 23, E 38, E 24, BAW 1163, BAW 1140 and BAW 1151 showed greater stress sensitivity than the others. Considering both moderate and high water deficit stress, BARI Gom 25, E 28 and BAW 1170 were found as tolerant and Sourav, E 23 and BAW 1140 were found as water deficit stress sensitive wheat genotypes. The Agriculturists 2017; 15(1) 81-91
      PubDate: 2017-08-04
      DOI: 10.3329/agric.v15i1.33431
      Issue No: Vol. 15, No. 1 (2017)
       
  • Seed Yield and Quality of Late Season Direct Seeded Kenaf (Hibiscus
           cannabinus L.) as Influenced by Spacing and Time of De-topping

    • Authors: Md. Abul Fazal Mollah, Md. Moshiur Rahman, Md. Zablul Tareq, ABM Zahidul Hoque, Mir Mehedi Hasan
      Pages: 92 - 100
      Abstract: An experiment was conducted at the Bangladesh Jute Research Institute (BJRI), Regional Station, Kishoreganj during July to December of 2010 and 2011 to investigate the effect of spacing and de-topping on yield and quality of kenaf seeds cv. HC-95 grown under direct seeding method. Three plants spacings (40 cm × 15 cm, 30 cm × 15 cm and 20 cm × 15 cm) and four de-topping treatments (no de-topping, de-topping at 15, 30 and 45  days after emergence (DAE) were applied in a Randomized Complete Block Design (RCBD) with three replications. The highest yield of kenaf seed (1403 and 1646 kgha-1 in 2010 and 2011, respectively) was obtained from sowing at 30 cm × 15 cm spacing. The best quality seed in respect to germination and vigour was also obtained from sowing at 30 cm × 15 cm spacing. The highest seed yield, germination and vigour of seed were obtained for de-topped at 45 days after emergence. It is concluded that the highest seed yield and quality of late season direct seeded kenaf could be obtained by sowing at a spacing of 30 cm x 15 cm and de-topping at 45 days after emergence. The Agriculturists 2017; 15(1) 92-100
      PubDate: 2017-08-04
      DOI: 10.3329/agric.v15i1.33432
      Issue No: Vol. 15, No. 1 (2017)
       
  • Effect of Nitrogen, Phosphorus and Potassium Fertilizers on Yield and
           Yield Attributes of Marigold (Tagetes patula L.)

    • Authors: R Ahmed, MJ Hussain, S Ahmed, MR Karim, MA Siddiky
      Pages: 101 - 109
      Abstract: An experiment was conducted at the research field of Horticulture Research Centre, BARI, Gazipur during Rabi season of 2012-13 to 2014-15 to evaluate the yield and yield attributes of Marigold (var. BARI Marigold-1) to different doses of N, P and K fertilizers and to find out the optimum and economic doses of NPK for maximizing flower yield. Eleven treatments as T1, T2, T3, ……,T10 and T11 comprising with four levels of fertilizer nutrients each of N (0, 60, 90 and 120 kg ha-1), P (0, 30, 40 and 50 kg ha-1) and K (0, 60, 90 and 120 kg ha-1) along with a blanket dose of 2 kg B and 4 kg Zn ha-1. The experiment was conducted assigning the treatments in a randomized complete block design with three replications. Flower yield and yield attributes of marigold significantly increased with NPK fertilizer for all three years. The significantly highest flower yield (22.25, 27.38 and 25.15 ton ha-1) was obtained from T3 treatment applying the nutrients N90P40K90 kg ha-1 along with blanket dose of 2 Kg B and 4 kg Zn ha-1 for the years 2012-13, 2013-14 and 2014-15, respectively which was statistically identical with T4 treatment (N120P40K90 kg ha-1) for the year 2012-13, but significantly different from all other treatments for the years 2013-14 and 2014-15, respectively. Flower yields were increased in T3 treatment (N90P40K90 kg ha-1) by 81.34, 62.53 and 49.53%; 146.00, 119.39 and 108.84% and 121.20, 92.13 and 84.11% over their control in respect to the years 2012-13, 2013-14 and 2014-15. The highest benefit-cost ratio 7.14 was obtained from T3 (N90P40K90 kg ha-1) followed by T4 (6.53) treatment. From the quadratic regression equation averaging three years data the optimum and economic doses 103.75 and 102.44 kg N; 36.67 and 36.31 kg P and 90.10 and 88.43 kg K, respectively were found which could be recommended for marigold production in Grey Terrace Soil of Joydebpur under AEZ 28.The Agriculturists 2017; 15(1) 101-109
      PubDate: 2017-08-04
      DOI: 10.3329/agric.v15i1.33433
      Issue No: Vol. 15, No. 1 (2017)
       
  • Evaluation of Aus Rice (Oryza sativa L.) Production in Less Irrigated
           Situation in Northern Region of Bangladesh

    • Authors: M Sh. Islam, ABM Zahid Hossain, MS Miah, SM Shahriar, MAA Mamun
      Pages: 110 - 115
      Abstract: Twenty one demonstrations and two validation trials were carried out at the farmers’ field in  the northern region of  Bangladesh  during 2014 using Aus rice: variety BRRI dhan48 to enhance Aus (pre-monsoon) rice cultivation. Grain yields of 3.5 to 6.5 t ha-1 were obtained from demonstrations plots conducted in different farmers’ field. The validation trial was conducted in the farmers’ field at Mithapukur and Nilphamari Sadar Upazillas using BRRI dhan28 and BRRI dhan48 as Braus (rice grown between Boro and Aus season) after harvesting potato. Grain yield of about 5.0 t ha-1 was obtained from the rice variety BRRI dhan28, while 6.6 t ha-1 was obtained from BRRI dhan48. BRRI dhan48, due to its shorter growth duration (100-105 days) required 2-3 less irrigations. About 28-36% less irrigation water was required during dry season when BRRI dhan48 was used as Braus instead of BRRI dhan28 as a Boro crop. About  20 to 60% higher grain yield was observed in different farmers’ field with BRRI dhan48 over BRRI dhan28, which indicated  that BRRI dhan48 is a  potential rice variety during  Aus or Braus season. BRRI dhan48 can be cultivated after Boro harvest or as Braus after potato harvest. The variety could also decrease the pressure on ground water utilization for rice cultivation during dry season. The Agriculturists 2017; 15(1) 110-115
      PubDate: 2017-08-04
      DOI: 10.3329/agric.v15i1.33434
      Issue No: Vol. 15, No. 1 (2017)
       
  • Feasibility of Introducing Rice Based Four Crops Pattern in Rangpur Region
           of Bangladesh

    • Authors: M Sh. Islam, Zakia Yesmin, MA Badshah, MA Ali
      Pages: 116 - 126
      Abstract: An experiment was conducted at Bangladesh Rice Research Institute (BRRI) Farm at Rangpur during July 2014 - June 2016 to introduce a 4-crops pattern with the aim of increasing cropping intensity, productivity, income and soil fertility. The experimental design was RCB with 3 replications. Four cropping patterns were tested which were: CP1 = T. Aman (BRRI dhan62)-Potato (Cardinal)-Mungbean (BARI Mung-6)-T. Aus (BRRI dhan48), CP2 = T. Aman (BRRI dhan62)-Mustard (BARI Sorisha-14)-Mungbean (BARI Mung-6)-T. Aus (BRRI dhan48), Farmers’ improved practice (FIP) = T. Aman (BR11)-Potato (Cardinal)-Maize (NK 40) and Farmers’ general practice (FP) = T. Aman (BR11)-Boro (BRRI dhan28)- Fallow.  In T. Aman 2014, BRRI dhan62 produced  3.87 and 3.85 t ha-1 grain yields under CP1 & CP2 (4 crops systems), respectively; BR11 gave grain yield of 4.62 and 4.36 t ha-1 in FIP and FP (3 and 2 crop system), respectively. In T. Aman 2015, BRRI dhan62 produced grain yield of 4.23 and 4.19 t ha-1 in CP1 and CP2, and BR11 gave grain yield of 5.95 and 5.92 t ha-1 in FIP and FP, respectively. After T. Aman, potato yield was 24.66 t ha-1 in CP1 and 24.17 t ha-1 in FIP during 2014-15. In CP2, 2nd crop mustard yield was 1.16 t ha-1 and3rd crop mungbean yield was only 0.98 t ha-1.In CP1, 3rd crop mungbean yield was only 0.83 t ha-1. After potato in FIP, maize yield was 8.38 t ha-1. After T. Aman (BR11) in FP, grain yield of BRRI dhan28 was 5.42 t ha-1. The yield of BRRI dhan48 in CP1 and CP2 (as 4th crop) was 4.5 t ha-1. Similar results of different crops were obtained in 2015-16. The rice equivalent yield (REY) was found to be 30.05 & 35.95 t ha-1yr-1 in CP1 during 1st and 2nd yearfollowed by FIP (23.92 & 29.82 t ha-1yr-1, respectively). The REY was higher in 2nd year compared to 1st year. In 2014-15 the highest net return of Tk.2,42,560 ha-1 was observed in CP1 followed by FIP(Tk.1,58,380 ha-1); in 2015-16, the highest net return was in CP1 (Tk.2,16,960 ha-1) followed by FIP(Tk.1,24,620 ha-1). Potato based cropping pattern was thus, the most suitable and profitable pattern in this area. T. Aman (BRRI dhan62)-Potato (Cardinal)-Mungbean (BARI Mung-6)-T. Aus (BRRI dhan48) may, therefore, be the most suitable and profitable cropping pattern in medium high lands of Rangpur region. The Agriculturists 2017; 15(1) 116-126
      PubDate: 2017-08-04
      DOI: 10.3329/agric.v15i1.33435
      Issue No: Vol. 15, No. 1 (2017)
       
  • Effect of Tillage Practices and Rice Straw Management on Soil Environment
           and Carbon Dioxide Emission

    • Authors: MM Rahman, JC Biswas, M Maniruzzaman, AK Choudhury, F Ahmed
      Pages: 127 - 142
      Abstract: Carbon (C) inputs and tillage intensity impinge on C degradation and thus CO2 emission and soil properties get influenced. Information on CO2 emission and soil properties under different tillage practices and straw application in rice based cropping system in Bangladesh is lacking. The effects of rice straw and tillage operations on CO2 emission and soil properties were quantified in four consecutive seasons of transplanted Aman and Boro rice grown under two tillage operations (minimum and traditional) and three levels of rice straw (control, incorporation and mulch) during 2010 to 2012. Irrespective of tillage practices, CO2 emission peak reached after 3-4 weeks of straw application. Carbon dioxide emission ranged from 26 to 59 kg ha-1 day-1 under minimum tillage and 25 to 96 kg ha-1 day-1 under traditional tillage. Minimum tillage accumulated more C in soil, which could be attributed to lower rates of emission and straw degradation. Carbon degradation rate constants, k were 0.000300 and 0.000394 (day-1) under minimum and traditional tillage, respectively. Small increment in soil C might help reducing CO2 in the atmosphere. Mineralization of straw increased nutrient contents and thereby improved the soil fertility and availability to the crops for nutrients’ uptake. Traditional tillage significantly reduced soil bulk density and increased field capacity of the soil, whereas in addition, rice straw application furthermore increased permanent wilting point and available water content in the soil. The present study may help in identifying suitable tillage and residue management options in reducing CO2 emission from rice fields.The Agriculturists 2017; 15(1) 127-142
      PubDate: 2017-08-04
      DOI: 10.3329/agric.v15i1.33436
      Issue No: Vol. 15, No. 1 (2017)
       
  • Combined Effect of Arbuscular Mycorrhiza, Rhizobium and Sclerotium rolfsii
           on Grass Pea (Lathyrus sativus)

    • Authors: M Rahman, ME Ali, F Alam, MN Islam, MAH Bhuiyan
      Pages: 143 - 155
      Abstract: The present study was carried out to evaluate the combined effect of indigenous arbuscular mycorrhizal (AM) fungi, Rhizobium and Sclerotium rolfsii on Grasspea (Lathyrus sativus) in the net house of Soil Science Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur during 2014-2015 through 2015-2016. The experiment was designed in RCBD with 8 treatments and 4 replications. Grasspea variety BARI Khesari-1 was used as a test crop. Peat based rhizobial inoculum (BARI RLs-10) was used in this experiment @ 50 g kg-1 seed. The AM fungi used in this experiment were Glomus fusianum, Glomus macrocarpum, Glomus warcuppi, Acaulospora foveata, Acaulospora denticulate, Gigaspora albida, Gigaspora rosea, Glomus spp. etc. Soil based AM inoculum containing about approximate 252 spores and infected root pieces of the host plant was used pot-1. There were eight treatments viz. T1: Arbuscular mycorrhiza (AM), T2: Rhizobium, T3: AM + Rhizobium, T4: Sclerotium rolfsii, T5: Sclerotium rolfsii + AM, T6: Sclerotium rolfsii + Rhizobium, T7: Sclerotium rolfsii + AM + Rhizobium and T8: Control. Dual inoculation (AM + Rhizobium) significantly increased germination (%), nodule number and dry weight, root colonization by AM fungi and spore population in rhizosphere soils of grasspea compared to single inoculation or any other treatments. Dual inoculation increased germination after 23 DAS (20% in 2014-2015 and 23% in 2015-2016) compared to control. It increased nodule number plant-1 (172% in 2014-2015 and 72% in 2015-2016) over AM treatment, and (112% in 2014-2015 and 26% in 2015-2016) over Rhizobium treatment. It also increased root infection (20% in 2014-2015 and 56% in 2015-2016) over AM treatment, and (200% in 2014-2015 and 100% in 2015-2016) over Rhizobium treatment. It reduced foot and root rot disease (48% in 2014-2015 and 44% in 2015-2016) compared to control. On the contrary, Sclerotium rolfsii + Rhizobium, Sclerotium rolfsii + AM, and Sclerotium rolfsii + AM + Rhizobium reduced 12-17%, 16-20% and 28-31% foot and root rot disease, respectively compared to only Sclerotium rolfsii treatment. Therefore, use of these bio-control agents could be promoted as an active component of bio-intensive Integrated Disease Management Program (IDMP) under organic mode. The Agriculturists 2017; 15(1) 143-155
      PubDate: 2017-08-04
      DOI: 10.3329/agric.v15i1.33438
      Issue No: Vol. 15, No. 1 (2017)
       
  • Effect of Arbuscular Mycorrhizal Fungi on the Tolerance to Sodium Chloride
           Levels, and on Growth and Yield of Lentil (Lens culinaris)

    • Authors: M Rahman, MAH Bhuiyan, ME Ali, F Alam, RA Begum
      Pages: 156 - 169
      Abstract: A pot experiment was carried out in the nethouse of Soil Science Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur during 2014-2015 through 2015-2016. The design of the experiment was factorial randomized completely block design with 4 replications. The objectives of the study were to evaluate the potential of Arbuscular mycorrhization (AM) on the germination, yield and yield attributes of lentil treated with different concentration of sodium chloride (NaCl). Five NaCl treatments (0, 1, 2, 3 and 4%) possessed NaCl level as the first factor that were treated with soils before sowing of lentil seeds overriding or pivotal pulse crop in Bangladesh. The second factor consists of mycorrhizal and non-mycorrhizal treatments. Mycorrhizal plants showed better performance in terms of germination %, yield and yield contributing characters than non-mycorrhizal plants. With increasing NaCl concentration germination %, yield and yield contributing characters in the rhizosphere soil, decreased significantly (p<0.01). Interaction effects of mycorrhizal inoculation and NaCl on germination %, growth and yield of lentil were appeared to be statistically non-significant. The highest germination (96.25% in 2014-2015 and 92.50% in 2015-2016), seed yield (6.45 g pot-1 in 2014-2015 and 5.89 g pot-1 in 2015-2016), and stover yield (9.55 g pot-1 in 2014-2015 and 8.58 g pot-1 in 2015-2016) was found in NaCl 0% + AM treatment. The lowest germination %, seed yield and stover yield was found in NaCl 4% treatment. Mycorrhizal inoculation increased seed yield on an average by 31.85% during 2014-2015 and 63.71% during 2015-2016, and increased stover yield on an average by 48.56% during 2014-2015 and 63.55% during 2015-2016 over non-mycorrhizal inoculation. Therefore, it can be concluded that mycorrhizal inoculation increases germination %, growth and yield of lentil over non-mycorrhizal inoculation. The Agriculturists 2017; 15(1) 156-169
      PubDate: 2017-08-04
      DOI: 10.3329/agric.v15i1.33439
      Issue No: Vol. 15, No. 1 (2017)
       
  • Selection of Core Collection from Jesso-Balam Rice (Oryza sativa L.)
           Accessions Using Quantitative, Qualitative and Molecular Characters-A
           Review

    • Authors: MS Ahmed, Khandakar Md. Iftekharuddaula
      Pages: 170 - 181
      Abstract: Genetic improvement of rice (Oryza sativa L.) for yield is important for increasing demand of the growing population and the changing climate of the world. Recent studies showed that backcrossing twice using modern varieties as receptor and mini core collection as doner, most of the undesirable traits could be improved remarkably and in other words its maximum allele diversity could be brought back into rice fields. Core collection is defined as a subset chosen to represent the most genetic diversity of an initial collection with a minimum of redundancies. The objective of the present study was to review the selection of core collection of Jesso-Balam group of rice genotypes through quantitative, qualitative and molecular characters. Earlier, the same germplasms were characterized for agro-morphological, physico-chemical and molecular characters and grouped into different clusters by different methods at Bangladesh Rice Research Institute during 2009-12. Finally, the core collection was selected by reviewing the above characterized data and using the hierarchical cluster analysis. Moreover, the selection processes of core collection were improved by applying composite evaluation methods; such as agro-morphological traits, biochemical characters and so on, through sampling strategies based on genotypic values, predicted genotypic value, comparing different genetic distances, cluster methods and sampling strategies methods, molecular characterization or SSR marker base data. As a result, the selected core germplasm of Jesso-Balam rice accessions were JBPL1, JBPL8, JBPL9, JBPL10, JBPL13, JBPL15, JBPL16, JBPL17, JBPL19, JBPL20, JBPL21, JBPL23, JBPL25 and JBPL26. In conclusion, the core collection  need to be considered as the ‘working collection’ of Jesso-Balam rice genotypes for their easy and safe conservation and effective utilization in Gene bank.The Agriculturists 2017; 15(1) 170-181
      PubDate: 2017-08-04
      DOI: 10.3329/agric.v15i1.33440
      Issue No: Vol. 15, No. 1 (2017)
       
 
 
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