Irrigation management in soybean crops influences the occurrence of nematodes in the soil

  • Ricardo Gava
  • Thiago Ramos da Silva
  • Mayara Fávero Cotrim
  • Alexandra Botelho Lima Abreu
  • Jefferson Luis Anselmo
  • Paulo Eduardo Teodoro Universidade Federal de Mato Grosso do SulCampus de Chapadão do Sul
Keywords: Phytonematode., Glycine Max L., Water depths.

Abstract

One of the main limitations of soybean production is related to water availability and organisms found in the soil. Under the hypothesis that soil moisture may influence the nematode population, this study aimed to verify the occurrence of nematodes associated with different irrigation management in soybean crops. The experiment was carried out in a randomized block design. Treatments consisted of a subplot scheme, with four replications. The plots consisted of ten irrigation managements divided into five irrigation frequencies (1,2,3,4, and 5 days) and five additional water depths (25, 50, 75, 100, and 125% of crop evapotranspiration – Etc). The subplots were composed of four different soybean cultivars (NA 5909 RR, AS 3680 IPRO, and Desafio RR ePower IPRO). The experiment analyzed the variables plant height, first pod insertion, number of plants, moisture, hundred-grain weight, yield, and occurrence of nematode eggs and adults. Nematodes influence all the production components analyzed, affecting mostly the hundred-grain weight, especially the nematode Helicotylenchus sp., although the Meloidogyne sp. population was larger. The phytonematode population reduces with the increase in soil moisture to levels close to the saturation, indirectly influencing the yield increase.

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Author Biography

Paulo Eduardo Teodoro, Universidade Federal de Mato Grosso do SulCampus de Chapadão do Sul

Engenheiro Agrônomo pela Universidade Estadual de Mato Grosso do Sul (UEMS) e Engenheiro Civil pela Universidade Anhanguera-UNIDERP. Mestre em Agronomia - área de concentração: Produção Vegetal da Universidade Estadual de Mato Grosso do Sul, Unidade Universitária de Aquidauana (UEMS/UUA), onde participa de pesquisas na área de Fitotecnia com adubos verdes, braquiária, feijão, feijão-caupi, milho, milheto e soja nos seguintes temas: análises de adaptabilidade e estabilidade fenotípica, interação Genótipo x Ambiente, repetibilidade de caracteres, divergência e variabilidade genética, análise de trilha, modelos mistos (REML/BLUP), redes neurais artificiais (RNAs), inferência bayesiana, dentre outros. Desenvolve ainda pesquisas na área de geoestatística e climatologia com ênfase em: modelos matemáticos teóricos e métodos de interpolação, analise de cluster, ajuste de funções de densidade de probabilidade, precipitação provável e tamanho da amostra.

Published
2020-04-22
How to Cite
Gava, R., Silva, T. R. da, Cotrim, M. F., Abreu, A. B. L., Anselmo, J. L., & Teodoro, P. E. (2020). Irrigation management in soybean crops influences the occurrence of nematodes in the soil. Bioscience Journal - ISSN 1981-3163 , 36(5). https://doi.org/10.14393/BJ-v36n5a2020-48197
Section
Agricultural Sciences