Corn and soybean response to rotation sequence, row spacing, and tillage system
Corn and soybean response to rotation sequence, row spacing, and tillage system
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玉米和大豆对轮作顺序、行距和耕作系统的响应
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
J. Lauer
中科院分区：
文献类型：
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作者：
P. Pedersen;J. Lauer
玉米（Zea mays L.）和大豆（Glycine max (L.)）的行距不大于76 cm。稳定。正变得越来越普遍。但是，关于不同旋转序列的行间距的信息很少。本研究的目的是确定轮作顺序、行距和耕作制度对玉米和大豆产量的影响。玉米和大豆分别以19、38和76 cm行距种植，采用常规耕作和免耕制度。两种作物在7个轮作序列中进行比较。行距与耕作方式或行距与轮作顺序对玉米或大豆产量影响不大。行距为19 cm的玉米产量比行距为38 cm和76 cm的玉米产量下降11%。免耕制度与常规耕作制度相比，玉米产量下降5%。每年轮作大豆的玉米和连续种植5年的第一年玉米产量比连续种植的玉米高出15%。大豆产量不受行距的影响。免耕大豆产量比常规耕作制度高出6%。玉米连作5年后的第一年大豆产量比其他6个轮作序列高出8%。结果表明，玉米-大豆的种植历史和耕作制度对确定玉米或大豆的最佳行距制度不重要。行距小于76厘米对两种作物都不利。
Row spacing less than 76 cm for corn (Zea mays L.) and soybean [Glycine max (L.) Merr. .] is becoming more common. However, little information is available on row spacing in different rotation sequences. The objective of this study was to determine the influence of rotation sequence, row spacing, and tillage system on corn and soybean yield. Corn and soybean were planted in 19-, 38-, and 76-cm row spacing in conventional tillage and no-tillage systems. Both crops were compared in seven rotation sequences. Few interactions were found between row spacing and tillage or between row spacing and rotation sequence for corn or soybean yield. Corn grain yield decreased 11% using the 19-cm row spacing compared with the 38- and 76-cm row spacings. Corn grain yield decreased 5% using the no-tillage system compared with the conventional tillage system. Corn rotated annually with soybean and first-year corn after 5 yr of consecutive soybean yielded 15% more than continuously grown corn. Soybean yield was not affected by row spacing. No-tillage soybean yield was 6% higher than the conventional tillage system. First-year soybean after 5 yr of consecutive corn yielded 8% more than the other six rotation sequences. We concluded that corn-soybean cropping history and tillage system were not important for determining optimum row-spacing system for corn or soybean. The use of a row-spacing system less than 76 cm was not beneficial for either crop.