2016年在兰州地区不同海拔条件下以玉米/大豆带状复合种植模式为研究对象，对其土地当量比、水分利用效益、肥料利用效益等指标进行评价，结果表明，与单作比较，玉米/大豆复合种植显著提高土地复种指数，具有良好的产出效果，单位面积产量较单作提高了1.59倍；水分利用效益为3.20元/m3，较单作玉米和单作大豆分别增加了59.20%和171.19%； N利用效益为71.55元/kg，较单作玉米和单作大豆分别增加了27.02%和73.18%；P2O5利用效益为107.32元/kg，分别增加了24.07%和94.83%；K2O利用效益为134.15元/ kg，分别增加了19.08%和62.36%。玉米/大豆复合种植实现了土地、劳动力、土壤养分和水热资源在时间和空间上的集约化利用，具有提高土地产出量及可持续利用性的优势，同时能适应机械化作业，显著提高生产效率，适宜在该区域大面积示范推广。

In order to quantitatively evaluate the benefits of yield, water and fertilizer， corn cultivar of Jinsui 3 and soybean cultivar of Zhonghuang 30 are used as materials, corn-soybean intercropping system is carried 2016 in different altitudes in Lanzhou city. The result indicates that land use efficiency of corn-soybean intercropping system raised by 59%， compared with monoculture. the benefit of water is 3.20 yuan/m3， which increased by 59.20% and 171.19%， respectively， compared with corn and soybean monoculture； the benefit of N is 71.55 yuan/kg， which increased by 27.02% and 73.18%， respectively； the benefit of P2O5 is 71.55 yuan/ kg， which increased by 24.07% and 94.83%， respectively； the benefit of K2O is 134.15 yuan/kg， which increased by 19.08% and 62.36%, respectively. Corn/soybean intercropping is an effective cultivation method with great ecological and economic benefits. In addition to Labor， soil， heat and water resource intensively utilizing temporally and spatially， this intercropping system could increase the crop yield per unit area greatly， which could be extended at large scale.

S513；S565.1

兰州市农业科技专项(2015-3-37)；甘肃省农业科学院中青年基金(2015GAAS20)；国家现代农业产业体系建设专项(CARS-04-CES17)部分内容。