摘要
近代土壤水分运动的研究已引入土壤(S)—植物(P)—大气(A)连续系统的观点和以力学、分子动力学和热力学原理为基础的能量概念。遵循这些观点,以内蒙古林学院教学苗圃内北京杨(Populus beijingensis Hsu)苗木群体与其环境所构成的SPAC系统为对象,根据均质非饱和土壤的一维流动基本方程,考虑植物蒸腾和土壤表面蒸发过程,在确定了一些参数和函数关系的基础上,用BASIC语言编制程序在ALPHA计算机上模拟了该系统中土壤水分的运动。研究结果表明,预测与实测数据吻合较好,相对误差多在5％以下,其中最大的也不超过8％。
According to the equation of one-dimational flow through unsaturated homogenous soil and the consideration of plant transpiration and soil surface evaporation, a mathematical model has been developed using the ALPHA computer to simulate the soil water movement in the population of Populus beijingensis seedlings. Results indicate that the predictive data are nearly in accordance with the determinative, their relative errors generally under 5%, the maximum of them under 8% too.
出处
《林业科学》
EI
CAS
CSCD
北大核心
1989年第2期151-156,共6页
Scientia Silvae Sinicae
关键词
杨
苗木群体
土壤
非饱和
一维流
One-dimational flow
Unsaturated homogenous soil
