东北黑土区作物水分利用效率的研究

Study on the crop water use efficiency in black soil region of Northeastern China.

研究了不同作物栽培模式、耕作措施及养分水平对东北黑土区水分利用效率的影响。结果表明,改进耕作措施的小麦-玉米-大豆农田生态系统优化模式的水分利用效率最高;深松耕作水分利用效率高达1.42kg/hm^2·mm;自然降水条件下高肥区水分利用效率最高,适宜水分条件下高肥区、中肥区与有机肥区的水分利用效率差异不大,充足水分条件下中肥区水分利用效率最高。

Effects of plant-cultivated pattern ,tillage and nutritional level on water use efficiency in black soil region of Northeastern China are researched. The results show that water use efficiency of optimized patterns on wheat-corn-soybean ecosystem is highest,that of zonal tillage is 1. 42kg/hm2·mm, under natural precipitation,water use efficiency of high fertilizer region is highest under the suitable moisture,water use efficiency of high or middle fertilizer and organic manure region is approximate,and water use efficiency of middle fertilizer region is highest under sufficient water.