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Revista Verde de Agroecologia e Desenvolvimento Sustentável
Number of Followers: 3  

  This is an Open Access Journal Open Access journal
ISSN (Print) 1981-8203 - ISSN (Online) 1981-8203
Published by Grupo Verde de Agricultura Alternativa Homepage  [2 journals]
  • Production of lettuce and flower alelí of cutting in monoculture and
           intercrooping under organic fertilization conditions

    • Authors: Víctor José Milicia, Cristian Javier López, Javier Ítalo Pezzi, Karina Alejandra Montiel, María Fabiana Rodríguez, Marcelo Ramón Lovisolo
      Pages: 01 - 08
      Abstract: The objectives were to evaluate the effect of two types of fertilizers on the biological and economic yields of lettuce and on the quality of the stem in flower alelí and to establish the Equivalent Land relationship of monocultures and polycultures of lettuce and flower alelí for cut flowers, respectively. For this, a factorial experiment was carried out with two factors: system with three plantation levels: monoculture of lettuce, monoculture of flower alelí and polyculture of both species and type of fertilizer with three levels: composted chicken litter, granulated chemical fertilizer and control. The evaluated variables did not show interaction between the plantation systems and the type of fertilizer. In lettuce with composted chicken manure, the economic yield was 5.70 kg.m-2 and the biological yield was 0.218 kg.m-2, significantly higher than the treatments with inorganic fertilizer (4.55 kg.m-2 - 0.206 kg.m-2) and the control (2.94 kg.m-2 - 0.164 kg.m-2). Similar results found in the crops association. In flower alelí, the incorporation of chicken manure to the soil allowed to obtain floral stems 30.8% and 20.4% longer than the control and the chemical fertilizer, respectively. In all the cases, the total land equivalent ratio -RETT- was greater than 1, which indicates an advantage of polyculture in relation to monoculture. The inorganic fertilization had a RETT of 1.21, higher than the rest of the treatments.
      PubDate: 2023-02-19
      DOI: 10.18378/rvads.v18i1.9418
      Issue No: Vol. 18, No. 1 (2023)
  • Comparison of fungal diversity in different areas of soil use in the Pampa

    • Authors: Douglas Henrique Giovanella Rodrigues, Thais Müller, Claudete Rempel, Guilherme Liberato da Silva, Daiane Heidrich, Mônica Jachetti Maciel
      Pages: 09 - 16
      Abstract: In southern Brazil, together with Argentina and Uruguay, is located the Pampa Biome. The fungal diversity present in this place can be affected by soil exploitation, which end up, consequently, influencing other biological communities. The objective of this study was to compare the fungal diversity in different land use areas in the Pampa Biome. For that, soil collections were carried out in the city of Pantano Grande, located in Rio Grande do Sul. Three different land use areas were sampled: native, pasture and forestry areas. Soil fungi were isolated using the decimal dilution technique. Identification occurred through observations of macro and microscopic characteristics. Through statistics methods, the diversity of fungi was analyzed and the fungal community was compared between the sampled areas. A total of 265 individuals distributed in nine taxonomic types were isolated. The three areas had four taxa in common (Aspergillus niger, Aspergillus sp., Trichoderma sp. and Fusarium sp.), while the areas used for pasture were the only ones to present exclusivity in the presence of a taxon (Verticillium sp.). With this, it was possible to conclude that the areas used for pasture have the highest fungal biodiversity among the studied areas; however, statistically, the fungal richness between the different types of land use did not present differences.
      PubDate: 2023-02-19
      DOI: 10.18378/rvads.v18i1.9470
      Issue No: Vol. 18, No. 1 (2023)
  • Influence of fruit flies (Diptera: Tephritidae) on productivity in
           malagueta pepper in Mozambican semi-arid

    • Authors: Lucidio Henriques Vote Fazenda
      Pages: 17 - 23
      Abstract: The survey of fruit fly species, especially of the Tephritidae family, in the culture of chili peppers (Capsicum frutescens) is important for a better understanding in the monitoring and control of these groups of insects, given their economic importance for the production of chili peppers. Fruit flies are responsible for major losses in commercial fruit trees, so it is essential to know the predominant species in the region. The objective of this work was to study the influence of fruit flies (Diptera: Tephritidae) on the cultivation of chilli pepper in the Mozambican semi-arid region. Infested ripe fruits (with larvae and/or with symptoms of fruit fly attack) were systematically selected, 1 fruit was collected from each plant, targeting damaged and undamaged fruits on each plant. it was necessary to distribute traps in the area and subsequently collect the flies. The obtained results indicate that in the monitoring with traps there was a predominance of the genus Dacus in relation to the genus Ceratitis. The population peaks of each season (2013 and 2014) occur in the second semester in months of fruit maturation in all genera. The occurrence of species such as: Celidodacus sp., Ceratitis capitata, C. cosyra, C. millicentae, C. rosa, Dacus sp., Dacus bivittatus, D. famona, D. hamatus, D. humeralis, D. punctatifrons. In conclusion, the attack of fruit flies significantly influenced productivity, causing economic damage, requiring redoubled control. The sequential use of the toxic bait, over time, increased the number of populations of the genera Ceratitis and Dacus. The application of traps was not able to prevent the access of fruit flies within the production areas.
      PubDate: 2023-02-19
      DOI: 10.18378/rvads.v18i1.9308
      Issue No: Vol. 18, No. 1 (2023)
  • Influence of native pasture management in southern Brazil on dry mass
           production and forage protein content

    • Authors: Luigildo Proner Junior, Henrique von Hertwig Bittencourt, Juliano Cesar Dias, André Luís Finkler da Silveira, Lisandro Tomas da Silva Bonome
      Pages: 24 - 28
      Abstract: Grasslands in southern Brazil have inherent characteristics favorable to forage production for domestic herbivores, which can be impaired or enhanced by management. The aim of this study was to evaluate the influence of management on plant characteristics, comparing commonly used techniques. The experimental design was bifactorial, the first factor consisting of four managements: burning, oversowing with annual winter forages, mowing and absence of interference, and the second factor was the time elapsed between management and evaluation. The experiment was conducted under field conditions, in a complete randomized block design with four replications. The LAI (leaf area index), dry mass production and crude protein content of the pasture were evaluated. Pasture management with oversowing showed higher LAI growth rate, as well as higher pasture dry mass production than the other treatments. There was no effect of the different managements on the crude protein content of the pasture, but of the time, with the highest value on the 53rd day. The results suggest that the adoption of management with oversowing of annual winter forages should be emphasized for the productive improvement of native grasslands in southern Brazil.
      PubDate: 2023-02-19
      DOI: 10.18378/rvads.v18i1.9551
      Issue No: Vol. 18, No. 1 (2023)
  • Influence of Agroforestry Systems and oil palm (Elaeis guineensis)

    • Authors: Rodrigo da Silva Maia, Gabriele Carolina Nunes Miranda, Adler Glenda Gaia de Almeida, Taynara Cristina de Sousa Silva, Rayane Caroline Pinto Pinto, Steel Silva Vasconcelos
      Pages: 29 - 36
      Abstract: In the Amazon, the conventional oil palm system (Elaeis guineensis) is changing the landscape through increased deforestation, loss of biodiversity and increased soil erosion. An alternative cropping system based on oil palm insertion in Agroforestry Systems (AS) was proposed in the city of Tomé-Açu (state of Pará, Brazil) in order to evaluate the impact of this system on soil quality compared to conventional cultivation (monoculture). The objective of this study was to evaluate the impacts of two types of differents AS (with high and low plant diversity) on the percentage of mycorrhizal colonization (PMC) on the oil palm and the spore density in the soil in relation to the conventional crop. The PMC was evaluated in fine roots (diameter ≤ 2 mm) and soil samples (0-10 cm) were collected. Mycorrhizal colonization in oil palm cultivation inserted in AS was higher in relation to monoculture, on the other hand spore density was higher in the conventional system. Soil management based on agroforestry systems with high or low diversity of plant species may contribute to mycorrhizal colonization in the oil palm of the Amazon.
      PubDate: 2023-02-19
      DOI: 10.18378/rvads.v18i1.9377
      Issue No: Vol. 18, No. 1 (2023)
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
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