摘要： 研究结果表明，农田耗水主要在1m以上土层，玉米对0~50cm土层的水分利用率达60%；玉米农田棵间土壤水分蒸发占农田蒸散的47.6%~77.5%，整个生育期棵间蒸发与叶面积指数呈负相关，玉米产量与蒸腾量呈正相关；秸秆覆盖可有效减少棵间土壤水分蒸发；合理施肥能促进玉米对土壤水分的利用。

关键词: 旱塬地, 玉米, 棵间蒸发, 秸秆覆盖

Abstract: The study results indicated that water consumption of farmland was mainly in the soil layer no deeper than 1m; the water use efficiency of corn in 0~50 cm soil layer approached to 60%; the evaporation of soil water among corn plants with different treatments made up 47.6~77.5% of the farmland evapotranspiration; the evaporation among corn plants in the whole growing period was negatively related to leaf area index and corn yield was positively related to the transpiration of plants; stalk mulch can efficiently reduce the evaporation of soil water among corn plants; proper fertilization can promote corn's utilization of soil water.

Key words: Dryland, Corn, Evaporation among plants, Stalk mulch

中图分类号: 

• S513.01