Experimental Investigation of Soil Evaporation and Evapotranspiration of Winter Wheat Under Sprinkler Irrigation

Sprinkler irrigation is one of the typical irrigation technologies used for the winter wheat-summer maize double cropping system in the North China Plain. To evaluate the evapotranspiration (ET) of winter wheat under sprinkler irrigation in Beijing area, field experiments were conducted in growing seasons through 2005-2008, in the experimental station located in Tongzhou County, Beijing, China, with different irrigation depths. Results indicated that a relatively large variation of soil water content occurred within 0-40 cm soil layer. The seasonal ET of winter wheat generally increased with increasing irrigation amount, while the seasonal usage of soil water had a negative relationship with irrigation amount. Soil evaporation (Es) was about 25% of winter wheat ET during the period from reviving to maturity. Es increased while Es/ET decreased with increasing irrigation amount. Sprinkler irrigation scheduling with relatively large irrigation quota and low irrigation frequency can reduce E, and promote the irrigation water use efficiency.

作 者： YU Li-peng HUANG Guan-hua LIU Hai-jun WANG Xiang-ping WANG Ming-qiang   作者單位： YU Li-peng,HUANG Guan-hua,WANG Xiang-ping,WANG Ming-qiang(College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 10083, P.R. China)

LIU Hai-jun(College of Water Science, Beijing Normal University, Beijing 100875, PR.China) 

刊 名： 中國農業科學（英文版）  英文刊名： AGRICULTURAL SCIENCES IN CHINA  年，卷(期)： 2009 8(11)  分類號： S1  關鍵詞： sprinkler irrigation   winter wheat   evapotranspiration   soil evaporation   soil water distribution  

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