BENEFÍCIOS DO MILHO CONSORCIADO COM GRAMÍNEA E LEGUMINOSAS E SEUS EFEITOS NA PRODUTIVIDADE EM SISTEMA PLANTIO DIRETO
DOI:
https://doi.org/10.18512/1980-6477/rbms.v17n3p431-444Keywords:
Zea mays L., adubo verde, cobertura do soloAbstract
RESUMO - O consórcio de culturas econômicas com plantas de cobertura tem se tornado cada vez mais importante por proporcionar a cobertura do solo, além de disponibilizar nutrientes. Dessa forma, o objetivo do trabalho foi avaliar as características agronômicas, produção de massa e a produtividade do milho consorciado com quatro diferentes plantas de cobertura. O experimento foi realizado na Fazenda de Ensino, Pesquisa e Extensão da UNESP, no município de Selvíria-MS, nos anos agrícolas 2013/2014 e 2015/2016. O delineamento foi em blocos ao acaso, com cinco tratamentos e quatro repetições. Os tratamentos utilizados foram milho, milho + Crotalaria spectabilis, milho + guandu, milho + feijão-de-porco, e milho + Urochloa ruziziensis. Com base nos resultados obtidos, concluiu-se que a utilização do consórcio entre milho e leguminosas e/ou gramínea promoveu aumento da massa seca sobre o solo e da quantidade acumulada de N, P e K, comparado ao cultivo de milho exclusivo; o consórcio do milho com Crotalaria spectabilis, guandu, feijão-de-porco e Urochloa ruziziensis reduziu a produtividade de grãos de milho em aproximadamente 10, 11, 14 e 9%, respectivamente, na média de dois anos de cultivo.
Palavras-chave: Zea mays L., adubo verde, fixação biológica de N, cobertura do solo.
BENEFITS OF INTERCROPPING CORN WITH GRASSY AND LEGUMES AND THEIR EFFECTS ON YIELD IN NO TILLAGE SYSTEM
ABSTRACT – The intercropping of economically important crops with cover plants has become very significant for providing soil cover as well as nutrients. Thus, the objective of this work was to evaluate the morphological characteristics and yield of corn intercropped with four different cover crops. The experiment was conducted at the Experimental Station of UNESP, Selvíria county (MS), in the growing seasons 2013/14 and 2015/16. The experimental design was randomized blocks with five treatments and four replications. The treatments used were: corn, corn + Crotalaria spectabilis, corn + pigeon pea, corn + jack beans, and corn + Urochloa ruziziensis. The results showed that the use of intercropping between corn and legumes and / or grass promoted increase of the dry mass over the soil and the accumulated amount of N, P and K, compared to the exclusive corn crop; the corn intercropped with Crotalaria spectabilis, guandu, jack beans and Urochloa ruziziensis presented reduced grain yield by approximately 10, 11, 14, and 9%, respectively, in the two growing seasons.
Keywords: Zea mays L., green manure, biological N fixation, soil cover.
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