Developing a Meter to Measure Reference Evapotranspiration and Apply to Irrigation Forecast

摘要：

The reference evapotranspiration meter could simulate the physical procedure of soil evaporation and plant transpiration,and could be employed to measure reference evapotranspiration directly.The apparatus can be operated and maintained easily with a low price.Therefore,the instrument is suited for use in China.Field tests of the instrument for winter wheat and summer maize were carried out in plain zone of central Shanxi Province in northwest China,Two other methods including Penman-Monteith formula and the evaporation pan were also applied to measure reference evapotranspiration to compare the precision of the instrument.The test data of the three methods were compared with lysimeter data.The result suggested that the precision to measure reference evapotranspiration by the instrument directly was a little lower than the Penman-Monteith formula but was greatly higher than the evaporation pan.Therefore,the accuracy of irrigation forecast could be satisfied by the instrument.

关键词： reference evapotranspiration instrument method of Penman-monteith formula method of evaporation pan irrigation forecast

作者: Wang Yubao Wang Zhinong He Wuquan

作者单位: College of Water Resources and Architectural Engineering,Northwest Sci-Tech University of Agriculture and Forestry,Yangling,712100,China

会议类型: 国际会议

会议名称: International Conference on Effective Utilization of Agricultural Soil & Water Resources and Protection of Environment and the 4th Annual Academic Conference of Chinese Society of Agricultural Soil and Water Engineering

会议地点: 南京

会议语种:英文

页码: 147-153

在线出版日期: 2006-08-16（万方平台首次上网日期，不代表论文的发表时间）