摘要
针对东北风沙半干旱地区春旱严重、降雨资源年内分布不均的气候特点,在秋收后、霜冻之前进行灭茬覆膜处理,对旱地雨水资源跨时调节;通过对翌年春季土壤含水量、玉米生长状况及产量的调查结果表明,秋覆膜处理的耕层土壤含水量比未覆膜处理高出65%,播种14天后玉米出苗率达到88%,抽穗期玉米株高比未覆膜处理高35cm、径粗增加0.43cm,秋收时玉米穗重比未覆膜处理提高了50.6%。
A field experiment was conducted to re-distribute moisture from rainfall against Spring drought in semiarid region of western Liaoning Province. The treatments of stubbling and plastic film mulching after the Autumn harvest could keep rainwater to be used in next growth periods. By investigating the soil water content, the growth and yield of maize, the results showed that the soil water content in plastic film mulching treatment was more 65% than that of uncovered treatment. The seedling emergence ratio reached 88% averagely after seeding 14 days. In the maize heading stage,the plant height in plastic film mulching treatment wast more 33cm than that uncovered treatment, and stem diameter was increased by 0.42cm. After the Autumn harvest, the yield of maize in plastic film mulching treatment increased by 50.6%.
出处
《土壤通报》
CAS
CSCD
北大核心
2008年第4期852-854,共3页
Chinese Journal of Soil Science
基金
“十一五”国家科技支撑计划“旱作农业关键技术研究与示范”(2006BAD291306)
辽宁省高校创新团队计划项目(2006T119)
辽宁省科技攻关“旱作农业项目”(2007212001)
关键词
半干旱地区
雨水资源跨时调控
玉米
Semiarid region
Seasonal control of rainwater resource
Maize
