干旱区研究2011，Vol.28Issue(2)：198-204,7.
保墒灌溉对夏玉米地土壤水分迁移转化的影响
Effect of Moisture Movement and Conserving under Straw Mulching in Maize Field
摘要
Abstract
In this experiment, three soil moisture conservation treatments, I. E. Plastic mulching, straw mulching and PAM chemical water-retaining agent, were designed to investigate the dynamic regulation of soil moisture content in maize field and water consumption of maize during the whole growing season under different irrigation treatments. The values of soil moisture content under distinct irrigating water quotas during different growing periods of maize were measured to analyze the temporal dynamic change of soil moisture content in summer maize field. The results show that the soil moisture content under conservation treatments was higher than that without treatment whenever the maize field was irrigated or not. Water-holding capacity of soil was increased with the increase of irrigation volume. It was found that the water consumption was decreased by 27. 92 mm, 24.54 mm and 2.07 mm under plastic mulching, straw mulching and PAM chemical water-retaining agent treatments, and the reductions were 58.4% , 51.33% and 4. 33% , respectively. Moreover, the soil water consumptions were increased by 11. 88 20.90 mm, 12. 93 - 18. 14 mm and 2. 00 -4. 39 mm respectively under plastic mulching, straw mulching and PAM chemical water-retaining agent treatment during the period from tasseling stage to milking stage. Water consumption during the period from milking stage to mature stage was similar to that during the period from tasseling stage and milking stage, and the change of soil water consumption was not significant due to rainfall. In conclusion, water consumption under different treatments during the whole growth season of maize was in an order of CK > PAM chemical water-retaining agent treatment > straw mulching > plastic mulching.关键词
保墒灌溉/夏玉米/土壤水分/迁移转化/耗水规律/杨凌/陕西Key words
moisture conserving irrigation/ maize/ soil moisture content/ migration and transformation/ water consumption/ Yangling/ Shaanxi Province分类
农业科技引用本文复制引用
贺军奇,员学锋,卫新东,汪有科..保墒灌溉对夏玉米地土壤水分迁移转化的影响[J].干旱区研究,2011,28(2):198-204,7.基金项目
国家十一五"863"项目现代节水农业技术创新平台(2006AA100223) （2006AA100223）
干旱半干旱地区水文生态与水安全学科创新引智基地(B08039) （B08039）
