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前言田间土壤含水量应用烘干法测定,计算工作量很大,已有的一些电算程序,尚存在一定的局限性,也缺乏误差判别标准。本文提出了一种误差判别标准,介绍一种新的计算程序,能以准确快速地计算土壤剖面不同测点、不同时刻的含水量、土壤储水量及时段内的变化量、变化率。(一)计算方法与程序设计1、计算方法用烘干法测定和计算土壤含水量时,一般在～个测点取1～3个土样,分别测算含水量,然后用(1)式求出平均值。(?)=(1/m)(?)ω_i(1)式中(?)——测点平均土壤含水量(占干土重%);ω_i——土样含水量(占干土重%);m——采样数目,有1、2、3三种情况。
Preface The field soil moisture content measured by drying method, the calculation workload is large, some of the existing computer programs, there are still some limitations, but also the lack of error criteria. This paper presents an error criterion, introduces a new calculation program that can accurately and quickly calculate the soil moisture content, soil water storage and the amount of change and rate of change in different time points of soil measuring points. (1) Calculation method and program design 1. Calculation method When the soil moisture content is determined and calculated by the drying method, generally 1 ~ 3 soil samples are taken at ~ a measuring point, and the water content is calculated separately, and then (1) The average. (?) = (1 / m) (?) Ω_i (1) where (?) - average soil moisture content of the measuring point (accounting for dry soil weight%); ω_i-- soil water content ); m - the number of samples, there are three cases 1,2,3.