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作 者 ：路海东,贾志宽*,杨宝平,李永平,刘世新

期 刊 ：生态学报 2010年 30卷 21期 页码：5941~5948

关键词：粮草间作；坡耕地；产量；水土流失；

Keywords:intercropping of grain-grass, sloping field, yield, soil erosion,

摘 要 ：在宁夏南部旱区15°坡耕地上，于2007年5月至2008年10月连续2a研究了7种不同粮草带状间作（谷子和糜子间作苜蓿）模式与粮食单作（对照处理）模式下的作物产量、形态指标、水分利用效率及水土流失特征。结果表明，同粮食单作相比，4∶4、4∶6、6∶4、6∶6、6∶8、8∶6和8∶8等7个粮（谷子或糜子）草（苜蓿）条带间作种植模式的作物生育后期单株叶面积和单株质量明显增加，作物水分利用效率提高0.99-1.57kg/m3，产量增加3.02%-15.72%，地表径流减少6.86%-58.42%，泥沙流失量减少56.09%-100%。不同粮草带比间作种植模式比较，带距越窄，粮食增产效果和整体水土流失防治效果越佳。尤其是4∶4、4∶6和6∶4 3种带比间作种植模式的综合效果较好。

Abstract:On 15°sloping field in dry areas of south Ningxia province, the crop yield, morphological index, water use efficiency and soil erosion characteristics were researched about seven different types of strip intercropping of grain-grass (Millet and Alfalfa) and sloe cropping of grain (Millet) during May 2007 to October 2008. The results were showed that: Compared with sloe cropping of grain, other seven different types of strip intercropping of grain-grass(4∶4, 4∶6, 6∶4, 6∶6, 6∶8, 8∶6, 8∶8) increased leaf area and quality of single plant significantly. The intercropping of grain-grass patterns increased crop water use efficiency by 0.99kg/m3-1.57kg/m3 and crop yield by 3.02%-15.72%, decreased surface runoff by 6.86% - 58.42% and sediment runoff by 56.09%-100%. Among different types of strip intercropping of grain-grass, the strip of intercropping of grain-grass was more narrower, the effects of crop yield increase and soil erosion control was more better. Consolidated comparative results of different intercropping grain-grass patterns was that the three types of 4∶4, 4∶6 and 6∶4 were the best intercropping pattern.

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