摘要
以田间实验资料为基础 ,建立农田蒸散量和土壤相对含水量与潜在蒸散的函数关系。利用这种函数关系 ,计算黄淮海地区 ,在自然条件下农田蒸散量的变化。结果表明 ,黄淮海农田蒸散量的年变化呈双峰型 ,第一峰值出现在冬小麦抽穗开花期 ,第二高峰出现在夏玉米抽雄开花期。农田蒸散的区域分布趋势与自然降水分布相一致 ,在量值上约等于降水量的 84%
On the basis of the experimental data in farmland,a function relationship between the potential evapotranspiration and the relative water content of the soil in the root zone was established.By using the function relationship,the actual evapotranspiration was calculated in natural rainfal condition in Huang-Huai-Hai region.Theannual change of the actual evapotranspiration was in dual-peak type,the first peak value occurred in the booting-flower stage of wheat,the second one took place during booting-flower stage of summer corn.The trend of regional distribution of evapotranspiration conformed to that of natural precipitation,its value was over 84%of the rainfall.
出处
《气象学报》
CSCD
北大核心
2001年第6期784-794,共11页
Acta Meteorologica Sinica
基金
国家自然科学基金资助项目 ( 4 9871 0 4 1 )
中国科学院禹城实验站开放课题 ( 4 9890 330 )
关键词
农田实际蒸散
计算方法
区域分布
黄海
潜在蒸散
土壤相对含水量
淮海
Actual evapotranspiration in farmland,Estimating method,The regional distribution of actual evapotranspiration.
