摘要
针对河西内陆灌区膜上灌玉米，进行了不同覆膜宽度条件下苗期不同时刻的各土层土壤温度测定，结果表明：在0～25cm土层内，1．25m宽膜膜上灌处理的地温比0.75m窄膜膜上灌处理要高，但二者的日变化趋势一致，均呈现以中午14：00时刻土壤温度为峰值的单峰曲线。在5、10、15、20和25cm深度处的土壤温度，沿1．25m宽膜、0．75m窄膜膜上灌处理至常规灌溉处理的顺序依次递减。同时膜上灌处理的各土层之间地温呈现平缓的变化趋势，并且始终保持较高地温，利于苗期玉米根系生长，为增产增收奠定基础。
The soil temperature of maize under film hole irrigation was mensurated in the seeding period with different plastic film width within different time. The results showed that the soil temperature of plastic mulching 1. 25 m was higher than that of 0. 75 m, and the diurnal change of soil temperature showed a consistency, that was, only one maximum values at 14：00. The soil temperature within 5, 10, 15, 20 cm and 25 cm soil depth were degressive follow the sequence of hole irrigation with plastic mulching 1.25, 0.75 m, and border irrigation. The soil temperature variety of film hole irrigation presented flat current among different soil depth and the higher temperature was kept under film hole irrigation, within which was propitious to the growth of maize root and laid a foundation to yield-increasing and income-increasing.
出处
《灌溉排水学报》
CSCD
北大核心
2008年第4期96-98,共3页
Journal of Irrigation and Drainage
基金
国家863计划项目(2002AA6Z3191)
关键词
膜上灌
玉米
土层深度
土壤温度
film hole irrigation
maize
soil depth
soil temperature
