线性根系吸水模型在土壤—作物系统中的应用

在土壤－作物系统中，根系吸水模型是连接土壤和作物的桥梁，然而又是最难处理的一个环节。按植物生长发育规律模拟根系在各个土层中生长速率和绝对量分布的方法，难以获得满意的结果。将几个影响根系吸水的因素综合起来考虑，用线性方程进行描述，建立根系吸水模型，是近些年来出现的一个较为简捷的新途径。本文通过对北京地区冬小麦田间试验的实际测定与模拟结果相比较，证明了在土壤－作物系统中采用线性根系吸水模型可取得较为理想的结果。

The Application of Linear Root Water Uptake Model in Soil-Plant System

In soil-plant system,linear root water uptake model is a linkage between soil and plant. It is a key difficulty to establish a root water uptake model which used satisfactorily. The simulation of absolute root quantity,according to plant growth pattern,can not do well to obtain satisfactory results. One of the most research methods used in recent years is to use linear equation to describe several factors comprehensively and set up root water uptake model. This article through the comparison between measured results in winter wheat field in Beijing area and simulation values,demonstrated that using linear root water uptake model in soil-plant system can obtain satisfactory results.