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Discussion on crop evapotranspiration and its variability regularity
Author(s): 
Pages: 104-107
Year: Issue:  4
Journal: JOURNAL OF AGRICULTURAL UNIVERSITY OF HEBEI

Keyword:  辐射项空气动力学项参照作物腾发量腾发规律;
Abstract: 选用Penman-Monteith公式计算了三河市参照作物腾发量(ET0),分析了不同水文年降水与参照作物腾发量的变化关系,并对参照作物腾发量构成项进行了比较.结果表明:参照作物腾发量中辐射项(ETrad)的变化趋势基本反映了腾发量(ET0)的变化趋势,一年四季都处于主导地位,而空气动力学项(ETaero)全年变化较小,一般在冬季对腾发量有较大影响.
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