关于Molz──Remson吸水函数的一个改进公式

An Improved Formula on Molz-Remson Roots Extraction Function

构造含有影响根系吸水的主要因素，形式简单合理，参数较易确定的吸水函数是在研究作物生长条件下土壤水分运动规律过程中颇值探讨的一个课题。本文通过在Ｍｏｌｚ—Ｒｅｍｓｏｎ吸水函数公式中引入Ｆｅｄｄｅｓ等构造以土壤含水率差值为却出的吸水函数时所采用的思想，提出了一个Ｍｏｌｚ—Ｒｅｍｓｏｎ吸水函数的吹进形式，数值模拟验证分析显示改进的吸水函数公式较Ｍｏｉｓ—Ｒｅｍｓｏｎ吸水函数公式更符合实际。

Formulation of roots extraction function,which shows primary factors influencing siol water uptake to roots and which's form is scruple and reasonable and parameters is easy to determine,is a key thesis of researches for soil moisture dynamics under cropped conditions. In thispaper, an improved formula on Molz-Remson roots extraction function is proposed in thelight of the idea which is used to form roots extraction function based on soil moisture deference by Feddes. Test analysis if numerical simulation shows that the improved formula moretallies with the actual situation than Molz-Remson Roots extraction function.