农田水量平衡模型对作物根系吸水函数及蒸散公式的敏感性  

Sensibility of the Field Water Budget Model to Water Extraction Function by Roots and Evapotranspiration form

作　　者：龚元石[1] 李保国[1] 

机构地区：[1]北京农业大学土壤和水科学系

出　　处：《水土保持研究》1996年第3期1-7,共7页Research of Soil and Water Conservation

基　　金：国家自然科学基金

摘　　要：以田间试验资料为基础，建立了一个农田水量平衡模型，探讨了它对作物根系吸水函数和蒸散公式的敏感性。结果表明．不同的根系吸水函数和蒸散公式对农田水量平衡模型的响应程度差异较大，根据与田间土壤水分实测结果比较，认为用Ｓｅｌｉｍ根系吸水函数和Ｐｅｎｍａｎ－Ｍｏｎｔｅｉｔｈ蒸散公式的组合模式能较好地模拟土壤水分变化过程。Based on the field observing data, a field water budget model was developed in this paper,and its sensibility to the water extraction function by roots and evapotranspiration form were studied. The results showed that the responsiveness was quite differ, while the various extraction functions and evapotranspiration forms were applied.Model predictions were in good agreement with the measUred water content in the soil profile,if the Selim-extraction function and Penman-Monteith form were used.

关 键 词：农田水量平衡 根系吸水函数 蒸散 敏感性 

分 类 号：S152.75[农业科学—土壤学]