昼夜不对称增温对麦田土壤水分的影响  

Effect of Asymmetric between Day and Night Warming on Soil Moisture in Wheat Field

作　　者：江晓东[1] 苏海报 王晓梅[1] 万长健[1] 韩小梅[1] 郝鸣驹 

机构地区：[1]南京信息工程大学气象灾害预报预警与评估协同创新中心/江苏省农业气象重点试验室,南京210044

出　　处：《灌溉排水学报》2014年第4期283-286,共4页Journal of Irrigation and Drainage

基　　金：国家自然科学基金项目(41105078);江苏省自然科学基金项目(BK2011827);江苏高校优势学科建设工程项目(PAPD);南京信息工程大学大学生实践创新训练计划项目(201410300112)

摘　　要：设置开放式田间增温系统，研究了昼夜不对称增温、昼夜对称增温，昼夜不增温条件下对冬小麦麦田水分的动态变化。结果表明，增温显著提高了小麦叶片的蒸腾速率，显著降低了土壤含水率，且主要影响O-30cm土层土壤水分。与对称增温处理相比，不对称增温处理下小麦叶片蒸腾速率增大，土壤含水率和土壤贮水量降低，不利于小麦根系对土壤水分的吸收。The experiments were conducted in an open field warming system to study the dynamic changes of soil moisture under the conditions of asymmetry warming between day and night, symmetric warming between day and night, and the control. Results showed that warming could improve the leaf transpiration rate of wheat and reduce soil water content significantly. Warming mainly affected soil moisture in 0-30 cm profiles. Compared with symmetric warming between day and night, leaf transpiration rate increased, soil water content and soil water storage decreased under asymmetry warming between day and night, which was ineonducive to water absorption of wheat root.

关 键 词：冬小麦 不对称增温 蒸腾速率 土壤含水率 土壤贮水量 

分 类 号：S512.11[农业科学—作物学]