辽西半干旱区春玉米节水高产技术集成模式研究

此文针对辽西半干旱区农业生产因年降水量少且分布不均，使得春玉米种植低产低效的问题，集成了覆膜保苗节水模式和露地坐水种补灌节水模式，并对两种模式在田间进行了应用效果验证。应用结果表明，两种模式应用较对照均能显著提高籽粒产量、水分利用效率及经济效益：产量分别较对照增加48.5%和49.9%，水分利用效率提高30.9%和21.4%，经济效益增加34.7%和33.7%。集成模式适宜于试验区玉米生产中推广应用。

Patterns of Techniques Integration for Water-saving and High Yield on Spring Maize in Semi-arid Area of West Liaoning

Crop yield and economic benefit are very low because of low annual precipitation and its uneven distribution in semi-arid area,west Liaoning.This study aimed to seek suitability of some key water-saving techniques and their integrating patterns.Two patterns were integrated.Of which,one named the water-saving planting pattern of film mulching and limited supplementary irrigation grates in mulching cultivation.While another was called the water-saving planting pattern of irrigating-sowing and limited supplementary irrigation in open cultivation.It showed that the yield,water use efficiency and economic benefits using the two patterns were higher than checked by 30.9% and 21.4%,48.5% and 49.9%,34.7% and 33.7%,respectively.It also suggested that these two patterns were suitable for the semi-arid area of west Liaoning.