Cover crops in succession to corn for silage in cerrado conditions

G. Castro, C. Silva, S. G. Moreira, Á. Resende
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引用次数: 4

Abstract

Although some studies on cover crops in grain production areas have been developed in recent years, information on cover crops in succession to corn silage are still scarce. The objective of this study was to evaluate the effect of different cover crops on the accumulation of nutrients and dry mass yield (DM) in shoots of corn plants in silage production area in the central region of Minas Gerais. The experiment was carried out in two different harvests: 2012/2013 and 2013/2014, which eigth treatments were used consisted of six cover species (turnip, millet, B. ruzziziensis, B. decumbens, crotalaria and sunflower), in addition to a treatment comprising the mixture of millet and crotalaria species and fallow area representing control treatment. The experiment was conducted in a randomized block design with four replications. In the two years of cultivation, the total quantities of nutrients accumulated in the shoots of corn plants did not vary with cover crops, except for the amount of Fe. In two crops, DM yield of corn shoots did not vary according to the different cover crops. The absence of response in corn yield was attributed to lack of adequate moisture for growing corn due to dry spells during harvests.
在塞拉多条件下,连续覆盖玉米作青贮作物
虽然近年来对粮食产区的覆盖作物进行了一些研究,但关于玉米青贮的覆盖作物演替的资料仍然很少。本研究旨在评价不同覆盖作物对米纳斯吉拉斯州中部青贮产区玉米植株养分积累和干质量产量(DM)的影响。试验在2012/2013年和2013/2014年两个不同的收获季节进行,其中8个处理包括6种覆盖物种(芜菁、谷子、ruzziziensis、B. decumbens、crotalaria和向日葵),另外一个处理包括谷子和crotalaria物种的混合处理和作为对照的休耕区。试验采用随机区组设计,设4个重复。栽培2年内,除铁含量外,玉米植株茎部积累的养分总量与覆被作物无显著差异。在两种作物中,不同覆盖作物对玉米幼苗的DM产量没有影响。玉米产量缺乏响应是由于收获期间干旱导致玉米生长缺乏足够的水分。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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