FERTILIZATION AND PLANT ARRANGEMENT IN INTERCROPPED MAIZE AND BRACHIARIA ADUBAÇÃO E ARRANJO DE PLANTAS NO CONSÓRCIO MILHO E BRAQUIÁRIA

Alvaro Vilela Resende; José Roberto Antoniol Fontes; Luciano Shozo Shiratsuchi; Luis Fabio Ribeiro; Luise Lottici Krahl Arns

FERTILIZATION AND PLANT ARRANGEMENT IN INTERCROPPED MAIZE AND BRACHIARIA ADUBAÇÃO E ARRANJO DE PLANTAS NO CONSÓRCIO MILHO E BRAQUIÁRIA

Authors: Alvaro Vilela Resende
José Roberto Antoniol Fontes
Luciano Shozo Shiratsuchi
Luis Fabio Ribeiro
Luise Lottici Krahl Arns
Publication date: 1 November 2008
Publisher: Universidade Federal de Goiás
Doi

Abstract

The <ins datetime="2008-11-27T14:56" cite="mailto:Escola%20de%20Agronomia">optimization </ins>of maize and Brachiaria intercropping managment is influenced by soil fertility, Brachiaria plant density, and maize plant arrangement. This research evaluated those factors interactions and their influence on the productivity of maize and Brachiaria. The experiment was carried out during two crop cycles, in a 2x2x3+1 factorial scheme, combining two conditions of maize fertilization (grain yield expectation of 6 or > 10 t ha-1), medium or high plant density of Brachiaria (< 20 or > 30 plant m-2), three maize plant arrangements (A = 90 cm row spacing with 5 plants m-1; B = 45 cm row spacing with 2.5 plants m-1; and C = 45 cm row spacing with 3 plants m-1), and one additional treatment (heavier fertilization, without Brachiaria and maize A arrangement). Water availability influenced the responses to treatments. In the rainy year, heavier fertilization promoted expressive grain yield increase, independently of the maize arrangement or the presence of Brachiaria. In the dry year, the maize yield increase, due to heavier fertilization, was smaller and there was a harmful effect caused by the higher Brachiaria density. The dry matter yield of Brachiaria was not directly related to the variation in plant density.   KEY-WORDS: Crop management; crop-livestock integration; precision agriculture; row spacing; plant population.   A otimização do manejo de milho consorciado com braquiária depende da fertilidade do solo, da densidade de plantas de braquiária e do arranjo de plantas do milho. Avaliaram-se as inte

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