Strip intercropping effects on yield and yield components of corn, grain sorghum, and soybean
Strip intercropping effects on yield and yield components of corn, grain sorghum, and soybean
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DOI：
10.2134/agronj1999.915807x
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发表时间：
1999-09-01
期刊：
影响因子：
2.1
通讯作者：
Francis, CA
中科院分区：
文献类型：
--
作者：
Lesoing, GW;Francis, CA
玉米带状间作和大豆[Glycine mar（L.）梅尔。]和高粱[Sorghum bicolor（L.）Moench]和大豆可能是一个可行的替代单一种植作物，以帮助减少土壤侵蚀。对产量和产量构成因素的仔细研究有助于了解作物的表现，并有助于设计更高产的系统。1988年至1990年，在内布拉斯加州东部的夏普斯堡粉质粘壤土（细，蒙脱石，中质典型Argiudoll）上进行了雨养和灌溉实验，以量化带状间作对作物产量和geld成分的影响。玉米、高粱与大豆相邻的边行比内行产量显著增加。增加种子数量和种子重量有助于提高玉米边行产量，而粒用高粱边行只有种子数量增加。大豆边行产量低于所有玉米带和巢粒高粱带在crossed网站。大豆种子数量在玉米旁边的边缘行较低。玉米边行种子数和种子重量的增加表明，资源的竞争是重要的生殖和灌浆期;高粱边行种子数的增加表明竞争只在生殖期。边行较高的玉米密度可以进一步利用生殖期与大豆的竞争优势，可能提高系统生产力。带状间作系统的全系统生产力最高比单作的组分作物高4%，两种系统之间的总收益没有差异。如果需要控制土壤侵蚀，在生产成本相似的情况下，带状间作与单作同样有利可图。
Strip intercropping of corn (Zea mays L.) and soybean [Glycine mar (L.) Merr.] and grain sorghum [Sorghum bicolor (L.) Moench] and soybean may be a viable alternative to monoculture cropping to help reduce soil erosion. Careful study of yields and yield components can add to understanding crop performance and contribute to design of more productive systems. Rainfed and irrigated experiments were conducted in eastern Nebraska from 1988 to 1990, on a Sharpsburg silty clay loam (fine, smectitic, mesic Typic Argiudoll), to quantify strip-intercropping effects on crop yields and geld components. Corn border-row and grain sorghum border-row yields next to soybean increased significantly compared with inside rows in the strips. Increased seed number and seed weight contributed to higher corn border-row yields, while only seed number increased in grain sorghum border rows. Soybean border-row yields were lower next to all corn strips and nest to grain sorghum strips at the rainfed site. Soybean seed number was lower in border rows next to corn. Corn border-row increases in seed number and seed weight indicate that competition for resources was important in both reproductive and grain-filling periods; sorghum border-row increases in seed number suggest competition only in the reproductive period. Higher corn density in border rows mag further exploit a competitive advantage with soybean in the reproductive period, perhaps increasing system productivity. Whole-system productivity of strip-intercropping systems was a maximum of 4% higher than monocultures of component crops, and gross returns did not differ between the two systems. If there is need to control soil erosion, strip intercropping can be equally profitable to monoculture if production costs are similar.