论文部分内容阅读
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/m~3,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 2016, under the different elevation conditions in Lanzhou, the maize / soybean strip compound planting pattern was taken as the research object. The land equivalent ratio, water use efficiency and fertilizer utilization benefit were evaluated. The results showed that compared with single crop, Soybean multiple cropping significantly increased land multiple cropping index, with good output effect. The yield per unit area was 1.59 times higher than that of single cropping. The water use efficiency was 3.20 Yuan / m ~ 3, increased by 59.20% compared with that of single corn and single soybean respectively. % And 171.19%, respectively. The N utilization efficiency was 71.55 yuan / kg, increased by 27.02% and 73.18% respectively compared with single corn and single soybean; the utilization efficiency of P2O5 was 107.32 yuan / kg, increased by 24.07% and 94.83% The utilization efficiency was 134.15 yuan / kg, an increase of 19.08% and 62.36% respectively. The corn / soybean compound planting has realized the intensive use of land, labor, soil nutrients and hydrothermal resources in time and space, has the advantage of improving land output and sustainable utilization, and at the same time can adapt to mechanized operations and significantly increase production Efficiency, suitable for large-scale demonstration and promotion in the region.