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Journal Cover   Bangladesh Journal of Agricultural Research
  [3 followers]  Follow
    
  This is an Open Access Journal Open Access journal
   ISSN (Print) 0258-7122
   Published by Bangladesh Journals Online Homepage  [103 journals]
  • The third genotypic clusters of Bemisia tabaci (Gennadius) (Hemiptera:
           Aleyrodidae) found in Bangladesh

    • Authors: SMH Jahan, KY Lee, MIA Howlader
      Pages: 1 - 16
      Abstract: The sweetpotato whitefly, Bemisia tabaci is a species complex that possessed several biotypes including different genotypic clusters within species, which may differ from each other genetically and physiologically but morphologically alike. This study was performed by molecular analysis for easy identification of whitefly and describes its biotype throughout Bangladesh. Whiteflies have been identified from different places of Bangladesh based on mitochondrial cytochrome oxidase subunit I (mtCOI) gene and 16S ribosomal RNA gene sequences analysis. The mtCOI sequences of BW3 (collected from eastern part of Bangladesh) whitefly were diverged by 14.5% and 15.1% compared with B and Q biotypes from Korea and it also diverged by 15.4% and 13.7% from each other compared to BW1 (collected from southern part of Bangladesh) and BW2 (collected from northern part of Bangladesh), respectively within the country. The 16S rRNA sequences of BW3 whitefly were more deviated by 41.5%, 10.7%, 42.7% and 12.6% compared with the country populations from BW1, BW2, B and Q biotypes, respectively. Moreover, it showed high divergences from indigenous whiteflies of southern and northern part of Bangladesh which clustered in a different clade on both mtCOI and 16S rRNA phylogeny. Therefore, till date three genotypic cluster of indigenous whitefly BW1, BW2 and BW3 are identified from Bangladesh.Bangladesh J. Agril. Res. 40(1): 1-16, March 2015
      PubDate: 2015-06-19
      Issue No: Vol. 40, No. 1 (2015)
       
  • Grain yield, nutrient balance and economics of T. Aman rice cultivation as
           influenced by nutrients management

    • Authors: MAH S Jahan, MAR Sarkar, NCD Barma, MNA Mondal, MNS Ferdousi
      Pages: 17 - 34
      Abstract: A field experiment was conducted at Regional Wheat Research Centre of the Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh during 2007 and 2008. The objectives were to find out the optimum nutrient management practice for grain yield, nutrient balance and economics of T. Aman rice. Twelve nutrient management treatments (with and without CRI) were tested in RCBD with 3 replications. Treatments were T1=HYG (0-80-16- 44-12-2-0), T2=MYG (0-56-12-32-8-1.5-0), T3=IPNS (5000-65-13-32-9-2-0), T4=STB (0-68-15-37-11-2-0), T5=FP (0-39-7-12-0-0-0), T6=CON (0-0-0-0-0-0- 0), T7=HYG+CRI(Crop residue incorporation), T8=MYG+CRI, T9=IPNS+CRI, T10=STB+CRI, T11=FP+CRI, T12=CON+CRI kg ha-1 CDNPKSZnB for T. Aman rice. On an average, maximum grain yield of T. Aman rice was obtained from STB+CRI (5.24 t ha-1) followed by IPNS+CRI (5.13 t ha-1), STB (5.12 t ha-1), IPNS (5.03 t ha-1), HYG+CRI (4.50t ha-1) and HYG (4.41 t ha-1). Numerically but not statistically higher yield and yield contributing parameters were noticed in CRI plots than without CRI. Except N and K remaining nutrient balance like P S Zn and B were found positive in case of HYG, MYG, IPNS and STB along with or without CRI nutrient managements while FP and CON (Control) showed negative balance. The maximum BCR was observed in STB (3.25) followed by STB+CRI (3.14) and IPNS (2.98) and similar trend was observed in MBCR.Bangladesh J. Agril. Res. 40(1): 17-34, March 2015
      PubDate: 2015-06-19
      Issue No: Vol. 40, No. 1 (2015)
       
  • Study on water sorption isotherm of summer onion

    • Authors: Md Masud Alam, Md Nazrul Islam
      Pages: 35 - 51
      Abstract: The water sorption characteristics of dehydrated onion and onion solutes composite by vacuum drying (VD) and air drying (AD) were developed at room temperature using vacuum desiccators containing saturated salt solutions at various relative humidity levels (11-93%). From moisture sorption isotherm data, the monolayer moisture content was estimated by Brunauer-Emmett-Teller (BET) and Guggenheim-Anderson-de Boer (GAB) equation using data up to a water activity of 0.52 and 0.93 respectively. Results showed that in case of non treated samples the monolayer moisture content values (Wo) of BET gave slightly higher values than GAB (9.7 vs 8.2) for VD, while GAB gave higher value than BET (11.0 vs 9.8) for AD. It is also seen that the treated and non treated onion slice and onion powder absorbed approximately the same amount of water at water activities below about 0.44 and above 0.44 the treated samples begin to absorb more water than the non treated samples. It was observed that 10-20% added of sugar gave no change in water sorption capacity while the amount of sorbed water increases with increasing amount added salt for mix onion product.Bangladesh J. Agril. Res. 40(1): 35-51, March 2015
      PubDate: 2015-06-19
      Issue No: Vol. 40, No. 1 (2015)
       
  • Effect of nitrogen level and leaf cutting frequency on foliage and seed
           yields of coriander

    • Authors: M Moniruzzaman, MM Rahman
      Pages: 53 - 60
      Abstract: A field experiment was conducted at BSMRAU farm, Gazipur to evaluate the effects of four nitrogen levels (0, 40, 80 and 120 kg/ha) and four levels of leaf cutting ( no cutting, one cutting at 30 DAS), two cuttings at 30 & 45 DAS and three cuttings at 30, 45 & 60 DAS ) on three genotypes of coriander (Coriandrum sativum L.) (CS001, CS002 and CS003). The genotype CS003 produced the highest foliage yield (8.92 t/ha) and the genotype CS001 gave the highest seed yield (0.93 t/ha). The maximum foliage and seed yields were obtained from the N application at 80 kg N/ha. The maximum foliage yield (11.21 t/ha) was recorded with the three cuttings, but the highest seed yield was noted with the one cutting (1.06 t/ha). The 80 kg N/ha coupled with three cuttings gave the top most foliage yield while the same rate accompanied with one cutting gave the top most seed yield for all genotypes.Bangladesh J. Agril. Res. 40(1): 53-60, March 2015
      PubDate: 2015-06-19
      Issue No: Vol. 40, No. 1 (2015)
       
  • Green cob and fodder yield of sweet corn as influenced by sowing time in
           the hilly region

    • Authors: M Shaheenuzzamn, RR Saha, B Ahmed, J Rahman, M Salim
      Pages: 61 - 69
      Abstract: A field experiment was conducted at the farm of Hill Tract Agricultural Research Station, Ramgarh, Khagrachari Hill District during Rabi season of 2010-11 and 2011-12 to determine the optimum sowing time for better yield of green cob as well as fodder of sweet corn (var. BARI Sweet corn-1) in the hilly region. Five sowing dates (November 20, November 30, December 10, December 20 and December 30) were included in the study. During 2010-11, the highest green cob yield was obtained from 20 November sowing (8.43 t/ha) followed by 30 November sowing (7.81 t/ha) and the lowest yield (5.00 ton/ha) from 20 December sowing. During 2011-12, the maximum green cob yield (8.60 t/ha) was also obtained from 20 November, which was statistically identical with that of 30 November (8.03 t/ha), 10 December (7.67 t/ha) and 20 December (8.11 ton/ha) sowing. Average of two years result showed that, the maximum fodder yield (39.99 t/ha) was obtained from 30 November sowing which was at par with that of 20 November sowing. Maximum TSS (Total soluble sugar) value of Sweet corn was obtained from 20 November sowing during 2010-11 and 30 November sowing during 2011-12. Across over two years, 20 November to 30 November sowing was found suitable for sweet corn production in the hilly areas in terms of green cob and fodder yield and also TSS value.Bangladesh J. Agril. Res. 40(1): 61-69, March 2015
      PubDate: 2015-06-19
      Issue No: Vol. 40, No. 1 (2015)
       
  • Yield response of summer country bean to boron and molybdenum fertilizer

    • Authors: Shamima Nasreen, MA Siddiky, R Ahmed, RP Rannu
      Pages: 71 - 76
      Abstract: Field experiments were conducted in the Grey Terrace Soil (Aeric Albaquept) under AEZ-28 at the Bangladesh Agricultural Research Institute (BARI) farm, Gazipur during summer seasons of 2010 and 2011 to determine the optimum rate of boron and molybdenum combination for maximizing the yield of summer country bean (var. BARI Sheem-3). Four levels each of B (0, 1, 2 and 3 kg ha-1 ) and Mo (0, 0.5, 1.0 and 1.5 kg ha-1 ) were used as treatment variables. The results indicated that application of B and Mo fertilizer combination exerted significant influence on the number of pods plant-1 , individual pod weight and pod yield ha-1 in both the years. The highest pod yield (9.58 t ha-1 in 2010 and 9.42 t ha-1 in 2011) was produced by the combination of 2 kg B and 1.5 kg Mo ha-1 and it was statistically identical with 2 kg B and 1.0 kg Mo ha-1 combination. Addition of B beyond 2 kg ha-1 along with higher doses of Mo created a detrimental effect to reduce yield irrespective of years. The results revealed that application of 2 kg B and 1 kg Mo ha-1 combination with a blanket dose of 50 kg N, 40 kg P, 60 kg K and 20 kg S ha-1 plus cowdung 5 t ha-1 might be optimum for summer country bean cultivation in Grey Terrace Soil of Gazipur.Bangladesh J. Agril. Res. 40(1): 71-76, March 2015
      PubDate: 2015-06-19
      Issue No: Vol. 40, No. 1 (2015)
       
  • Seed yield, nutrient balance and economics of mungbean cultivation as
           influenced by different nutrients management under AEZ-28

    • Authors: MAH S Jahan, MAR Sarkar, NCD Barma, MNA Mondal, MNS Ferdousi
      Pages: 77 - 93
      Abstract: A field experiment was conducted at Regional Wheat Research Centre of the Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh for 2 consecutive years during 2007 and 2008 to find out the optimum nutrient management practice for seed yield, nutrient balance and economics of mungbean. Twelve nutrient management treatments were tested in RCBD with 3 replications. Treatments were without CRI T1=HYG (0-24-40-48-24-3-1.2), T2=MYG (0-20-36-40-20-2-1), T3=IPNS (5000-9-37-36-21-3-1.2), T4=STB (0- 20-36-40-22-2-1), T5=FP (0-6-5-4-0-0-0), T6=CON (0-0-0-0-0-0-0) and with CRI T7=HYG+CRI, T8=MYG+CRI, T9=IPNS+CRI, T10=STB+CRI, T11=FP+CRI, T12=CON+CRI kg ha-1 CDNPKSZnB for mungbean. The maximum seed yield of mungbean was obtained from STB+CRI (1.57 t ha-1) followed by IPNS+CRI (1.54 t ha-1), STB (1.54 t ha-1), IPNS (1.52 t ha-1), HYG+CRI (1.44 t ha-1) and HYG (1.41 t ha-1) in 2007. Similar trend was found in 2008. Numerically higher yield and yield contributing parameters were noticed in CRI plots than without CRI. N and K balance were found negative in all the treatments. P, S, Zn and B balance were found positive in case of HYG, MYG, IPNS and STB along with or without CRI nutrient managements. While in case of FP and CON, the balance was shown almost negative. The maximum gross return and margin was obtained from STB+CRI followed by STB. Slightly higher BCR (3.00) was recorded from STB followed by STB+CRI (2.91).Bangladesh J. Agril. Res. 40(1): 77-93, March 2015
      PubDate: 2015-06-19
      Issue No: Vol. 40, No. 1 (2015)
       
  • Constraints and suggestions for modern variety potato production
           technology

    • Authors: ABM Sharif Uddin, M Mostafizur Rahman, M Hasanul Kabir Kamaly, M Bashirul Alam, M Mohiuddin Sheikh
      Pages: 95 - 108
      Abstract: A study was carried out to determine the production constraints of modern varieties of potatoes and also find out the probable suggestions to overcome the constraints as verified the views between the farmers and extension officials. Data were collected from 232 farmers sampled randomly from 1547 potato growers and 51 extension officials from 153 population available from the study area of three upazila namely; Durgapur, Mohanpur and Bagmara under Rajshahi district of northwest area of Bangladesh. The study area was selected through multistage sampling procedure with continuous field observation and consultations with teachers, extension personnel, experts and contact farmers along with literatures reviewed. Thus, twenty important constraints regarding potato production were identified and possible suggestions for overcoming the constraints were suggested by using the same procedure. The importance of the constraints and the suggestions were measured by using ‘Important Constraints Score Index (IPSI)’ and ‘Important Suggestion Index (ISSI)’. Out of 20 constraints and suggestions views of farmers and officials differed significantly for 15 items and 13 items.Bangladesh J. Agril. Res. 40(1): 95-108, March 2015
      PubDate: 2015-06-19
      Issue No: Vol. 40, No. 1 (2015)
       
  • Effect of sowing dates and genotypes on the yield of coriander (Coriandrum
           sativum L.)

    • Authors: M Moniruzzaman, MM Rahman, MM Hossain, AJM Sirajul Karim, QA Khaliq
      Pages: 109 - 119
      Abstract: A field experiment on coriander (Coriandrum sativum L.) taking five sowing dates viz. November 01, November 16, December 01, December 16 and December 31 and four selected genotypes viz. CS001, CS007, CS008 and CS011 was conducted during the Winter season of 2009-10 at Bangabandhu Sheikh Mujibur Rahman Agricultural University to study heat efficiency for the crop. The crop sown on November 16 and the genotype CS011 showed the highest heat use efficiency for dry matter, seed and stover yield. Heat use efficiency for dry matter as well as seed yield increased from November 01 to November 16 and then decreased with delayed sowing. November 16 sowing coupled with CS011 gave the maximum heat use efficiency for seed yield. Growing Degree Days (GDD) showed a positive linear response with dry matter accumulation and coefficient of regression was high in November 16 sowing as well as in CS011. Heat use efficiency showed a negative linear response with maximum (y = 2.058 – 0.054, R2 = 0.682*), minimum (y = 2.123 – 0.070x, R2 = 0.687*) and mean (y = 2.13 – o.063x, R2 =0.709*) temperature but positive linear response with relative humidity (y = 0.074x – 5.593, R2 = 0.702*).Bangladesh J. Agril. Res. 40(1): 109-119, March 2015
      PubDate: 2015-06-19
      Issue No: Vol. 40, No. 1 (2015)
       
  • Molecular divergence of secondary endosymbiont, Cardinium in Bemisia
           tabaci (Gennadius) and associates

    • Authors: SMH Jahan, KY Lee, MIA Howlader, HMK Bashar, GN Hasan
      Pages: 121 - 135
      Abstract: Whitefly, Bemisia tabaci (Hemiptera : Aleyrodidae) harbors numerous secondary endosymbionts, which are transmitted from mother to offspring by both horizontally and vertically, that have crucial role on host selection, biology, and evolution. Bacteria, Cardinium was identified in B. tabaci as well as in other whitefly population from many different countries by comparing 16S rDNA sequences. Cardinium were detected in all tested indigenous B. tabaci populations of Bangladesh, Myanmar, Nepal, and the Philippines as well as Q1 biotype of Korea. It was absent in B biotype of Korea and Q biotype of China. Cardinium was also detected in three out of five tested Aleurodicus dispersus population as well as in five out of seven Trialeurodes vaporariorum, whereas they were not detected in Tetraleurodes acaciae populatuion. In adition, Cardinium was detected in parasitoid Encarsia formosa attacking B. tabaci. Among the 19 whitefly populations from different countries, present studies identified four phylogenetic groups of Cardinium, thereby demonstrating the high diversity of this genus. Cardinium phylogeny suggests a correlation of geographical range with ecological variation at the species level.Bangladesh J. Agril. Res. 40(1): 121-135, March 2015
      PubDate: 2015-06-19
      Issue No: Vol. 40, No. 1 (2015)
       
  • Field performance and fruit quality of strawberry genotypes under
           subtropical climate

    • Authors: M Moshiur Rahman, MM Rahman, MM Hossain, MA Khaleque Mian, QA Khaliq
      Pages: 137 - 151
      Abstract: Thirteen strawberry genotypes collected from different sources were evaluated at the Fruit Research Field of Pomology Division, HRC, BARI, Gazipur, Bangladesh during the winter season of 2009-2010 and 2010-2011 for yield, yield contributing characters and nutrient components of fruit. Among the 13 genotypes studied, the plants of FA 005 produced the maximum number of fruits (43.50 plant-1) followed by FA 006 and FA 007 (37.50 plant-1), while FA 009 and FA 013 produced the minimum number of fruits (9.00 plant-1). The heaviest fruits were produced by FA 006 (18.73 g) followed by FA 007 (17.40 g) and FA 005 (16.96 g) which were statistically similar, while the lightest fruit was found in FA 014 (5.11 g). The fruit yield plant-1 of different genotypes varied from 52.00 to 737.70 g and plants of FA 005 produced the maximum yield followed by FA 006 (702.30 g plant-1) and these were significantly higher than those of others. The minimum yield plant-1 was recorded in FA 013 and FA 014. The TSS content was highest in FA 007 (8.50 %) followed by FA 017 (8.17 %), whereas the lowest was in FA 009 (6.33 %). The TSS to acid ration was maximum in FA 006 (11.32) followed by FA 017 (11.24), FA 007 (10.80) and FA 005 (10.62), while the lowest was in FA 011 (6.95). The sugar to acid ratio significantly ranging from 3.60 to 5.98, and it was maximum in FA 006 (5.98). Plants of FA 005 contained the maximum amount of ascorbic acid (77.33 mg 100g-1) followed by FA 006 (76.00 mg 100g-1), while the minimum in FA 010 (53.00 mg 100g-1).Bangladesh J. Agril. Res. 40(1): 137-151, March 2015
      PubDate: 2015-06-19
      Issue No: Vol. 40, No. 1 (2015)
       
  • Correlation and path coefficients analyses in Basmati rice

    • Authors: M Ratna, S Begum, A Husna, SR Dey, MS Hossain
      Pages: 153 - 161
      Abstract: Correlation and path coefficients analyses among fourteen morphological characters were studied in six advanced lines of Basmati rice and one commercial check namely BRRI Dhan 29. In general, genotypic correlation coefficients were higher than the corresponding phenotypic correlation coefficients suggesting that the environmental influence reduces the relationship between yield and yield contributing characters of rice. Correlation coefficient analysis showed significant positive correlation between plant height and panicle length at genotypic level. Number of filled spikelets/panicle showed significant positive correlation with yield at both genotypic and phenotypic levels but significant negative correlation was observed between plant height and yield. Number of effective tillers/plant had negative significant correlation with panicle length and with number of unfilled spikelets/panicle at genotypic level. Number of ineffective tillers/plant had significant negative correlation with 1000-seed weight at both genotypic and phenotypic levels. Path coefficient analysis revealed highest positive direct effect of number of filled spikelets/panicle on grain yield but plant height and number of unfilled spikelets/panicle had negative direct effect on grain.Bangladesh J. Agril. Res. 40(1): 153-161, March 2015
      PubDate: 2015-06-19
      Issue No: Vol. 40, No. 1 (2015)
       
  • Determination of maturity indices of BER (Zizyphus mauritiana Lam.) Var.
           BARI Kul-2

    • Authors: MN Islam, MM Molla, TAA Nasrin, ASM M Uddin, K Kobra
      Pages: 163 - 176
      Abstract: A study was conducted at Fruit Research Farm and Postharvest Technology Laboratory of Horticulture Research Centre, Bangladesh Agricultural Research Institute during the period from October 2009 to February 2010 to determine the maturity indices of ber. The ber variety BARI Kul-2 was selected for conducting the study. Ber fruits were tagged at fruit setting stage and harvested at 90, 100, 110, 120 days after fruit set (treatments). The physicochemical characters like fruit weight and size, specific gravity, TSS (%), sugar (%), acidity (%), pulpstone ratio, TSS-acid ratio, sugar-acid ratio as well as subjective sensory attributes like fruit colour and texture, and storage traits like storage life, physiological weight loss (%), ripening status and decay, browning and shriveling (%) of harvested fruits were evaluated for determining the proper stage of commercial maturity. The fruit weight, TSS (%), pulp-stone ratio, TSS/acid ratio, sugar-acid ratio and specific gravity of BARI Kul-2 were found 24.33g, 15.60, 15.66, 39.72, 16.14 and 0.98, respectively, at 110 days after fruit set. Considering all the physical and chemical characters matching with subjective parameters, fruits of BARI Kul-2 was found commercially mature after 110 days of fruit set when the fruits turned into light greenish yellow to greenish yellow colour and specific gravity less than 1.00.Bangladesh J. Agril. Res. 40(1): 163-176, March 2015
      PubDate: 2015-06-19
      Issue No: Vol. 40, No. 1 (2015)
       
 
 
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