垄膜沟种技术对辽西旱地春玉米土壤水分及产量的影响

在辽西风沙半干旱雨养农业区采用垄膜沟种技术，可有效提高自然降水利用率，达到保水增墒、减少无效蒸发，提高玉米产量的作用。试验结果表明，垄膜沟种技术种植的春玉米全生育期内在同等降雨条件下土壤含水量比常规地膜覆盖增加0.75个百分点，比裸地增加3.32个百分点。春玉米单株总叶面积比常规地膜覆盖和裸地种植分别增加了881.70 cm²和714.39 cm²，为春玉米增产提供了物质保障。垄膜沟种技术可提高玉米经济性状指标，增加产量，试验单产达11 847.39 kg/hm²，较裸地种植增加了2 681.62 kg/hm²，增产29.14%；比常规地膜覆盖种植增加了484.37 kg/hm²，增产4.25%。

The Influence of Technique of Ridge Film Mulching and Furrow Seeding on Soil Water and Yield of Spring Corn in Western Liaoning

Using the technique of ridge film mulching and furrow seeding in western Liaoning can improve the utilization ratio of natural precipitation to prohibit soil water evaporation, conserver soil water and increase yield of corn. Experiment showed that the total leaf area per plant increased by 881.70 cm2 and 714.39 cm², and soil water content of spring corn increased by 0.75 and 3.32 percentage points using technique of ridge film mulching and furrow seeding, which provided material guarantee for the yield increase of spring corn, than plastic film mulching and bare land. Technique of ridge film mulching and furrow seeding could improve the indexes of economic character, yield up to 11 847.39 kg/ha, 2 681.62 kg/ha more than a bare land increased by 29.14% and 484.37 kg/ha more than conventional plastic film mulching cultivation increased by 4.25%.