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首页> 外文期刊>African Journal of Biotechnology >Soil chemical properties and legume-cereal rotation benefits in an Ultisol in Nsukka, Southeastern Nigeria
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Soil chemical properties and legume-cereal rotation benefits in an Ultisol in Nsukka, Southeastern Nigeria

机译：尼日利亚东南部Nsukka的Ultisol土壤化学特性和豆类-谷物的轮换益处

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This research was conducted at the Department of Soil Science, University of Nigeria Teaching and Research Farm in 2008 and 2009 growing seasons. The objective was to evaluate the effects of edible grain legumes (cowpea and soybean) and velvet-bean/maize rotations on soil chemical properties and the contribution of these chemical properties to rotation benefit conferred on the maize by velvet-bean, cowpea and soybean. The experimental design was a factorial fitted into randomized complete block design comprising of four crop rotation systems, two nitrogen levels and two residue management options as factors replicated thrice making a total of 48 plots. Each year entailed two cropping sessions, first, the four crops (cowpea, soybean, velvet-bean and maize) were grown on separate plots and after harvest; maize was grown in all the plots to test for rotation effect. The result showed that the soil chemical properties nitrogen (N) and magnesium (Mg) were significantly higher in the legume-cereal rotations than in continuous maize in both years. Other chemical properties varied in the two years and between legume/maize and continuous maize rotations. Maize yield was significantly increased by velvet-bean/maize rotation in both years. Maize grain yields were also higher in cowpea/maize and soybean/maize rotations than in continuous maize but they were not significantly different. There was also significant rotation residue interaction effect with velvet-bean/maize rotation x residue having the highest maize yield. Regression analysis showed that 37 to 51% changes in maize yield were contributed by N, Mg and potassium (K).
机译：这项研究是在2008年和2009年生长季节在尼日利亚大学教学与研究农场土壤科学系进行的。目的是评估食用豆类（co豆和大豆）和天鹅绒豆/玉米轮作对土壤化学性质的影响，以及这些化学性质对天鹅绒豆，cow豆和大豆赋予玉米轮作效益的贡献。实验设计是一个因数分解为随机完整块设计，包括四个农作物轮作系统，两个氮水平和两个残留管理选项，这些因子重复三次，共绘制了48个样地。每年需要进行两次种植，首先，四种作物（（豆，大豆，天鹅绒豆和玉米）分别在不同的田地上和收获后进行种植;玉米在所有地块中生长以测试轮作效果。结果表明，两年中豆科/谷物轮作的土壤化学性质氮（N）和镁（Mg）显着高于连续玉米。两年中以及豆类/玉米和连续玉米轮作之间的其他化学特性也有所不同。两年来，通过天鹅绒豆/玉米轮作，玉米单产显着提高。 cow豆/玉米和大豆/玉米轮作中的玉米单产也比连续玉米高，但它们之间没有显着差异。天鹅绒豆/玉米轮作x残留量最高的玉米产量也有明显的轮作残茬相互作用效应。回归分析表明，氮，镁和钾（K）对玉米产量的影响为37％至51％。

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