Produção Nacional
Density of Competition between Species of Urochloa Sp. in Soybean Cultivation
2018; International Network for Scientific Information Publication; Linguagem: Inglês
10.22587/ajbas.2018.12.9.6
ISSN2309-8414
AutoresLucas Aparecido Manzani Lisboa, Manzani Lisboa, Ronaldo da Silva Viana, Victor Garcia Venâncio, Filipe Virgílio Ribeiro, Igor Virgílio Ribeiro, Paulo Monteiro De Figueiredo, Sérgio Ramos, Gabriel Rodrigues, Hiago Augusto Amaral Sacco, Mateus Marques Batista,
Tópico(s)Plant Growth and Agriculture Techniques
ResumoIntroduction: Competition between grasses and legumes in cultivation areas depends on their specific skills of survival.Objective: This work aimed to evaluate effects of densities of competition between species of Urochloa sp. in soybean cultivation.Material and Methods: The experiment was carried out in a completely randomized design, in a 3x5 factorial scheme, with 3 different grasses species: Urochloa brizantha cv.Marandu and Piatã and Urochloa ruziziensis; and 5 different densities of grasses, with 5 repetitions, summing 75 plots or vases.Thirty days after sowing, the following variable were set: SPADS -spad index of soybean; SC -stomata conductance; DSS -diameter of soybean stem; HS and HG -height of soybean and height of grass; NSL -number of soybean leaves; DMAPS and DMAPG -dry mass of aerial part of soybean and dry mass of aerial part of grass; and DMSR and DMGR -dry mass of soybeans ´root and dry mass of grass ´root.Conclusion: Urochloa brizantha cv. and Piatã e Urochloa ruziziensis caused a greater harmful effect in soybean cultivation.Development of soybean cultivation is impaired even in low competition with species of Urochloa, being necessary its control at the initial phase of cultivation..
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