膜下滴灌棉花土壤温度的动态变化规律  

Dynamic patterns of soil temperature in the drip irrigation underneath mulching film

作　　者：张朝勇[1] 蔡焕杰[2] 

机构地区：[1]嘉兴学院机电与建筑工程学院,浙江嘉兴314001 [2]西北农林科技大学水利与建筑工程学院,陕西杨凌712100

出　　处：《干旱地区农业研究》2005年第2期11-15,共5页Agricultural Research in the Arid Areas

基　　金：国家自然科学基金(50079024);教育部优秀青年教师资助计划项目(200139)的一部分

摘　　要：试验研究田间膜下滴灌棉花根际土壤的温度变化表明,覆膜能使土壤明显增温,温度梯度变化使地膜覆盖具有提墒作用。在一日内和棉花整个生育期的温度,膜中明显比膜边和垄沟都偏高,土壤浅层温度增加较快且变幅很大。不同深度土壤温度出现最高温度时间随深度增加而延迟。地温变幅与深度可以拟合成指数函数关系,且膜中14∶00时两者相关性最好。The experiment for the changes of soil temperature in cotton rhizosphere indicated that film mulching could obviously increase soil temperature, and form soil temperature gradients, which made film mulching capable of moving soil moisture upward. During one day of cotton growth or cotton growth, the temperatures of the central positions below mulching film were remarkably higher than those of the lateral positions below mulching film and the temperatures in shallow soil layers increased quickly with a wide range. The peak temperatures in different soil layers appeared late as the temperature-measuring positions went downward. The temperature-varying ranges and measuring depths could be fitted into an exponential function in which they matched each other best at 14∶00

关 键 词：棉花 膜下滴灌 土壤温度 动态变化规律 地膜覆盖 根际土壤 增温 增加 合成指数 作用 

分 类 号：S562[农业科学—作物学] S152