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一、问题的提出研究农田土壤水分变化规律和特点对鉴定农作物水分供应,拟定灌溉方案和了解农田水分收支等均有很大的实际意义。但是,目前系统的实测土壤水分资料还很不够,测定方法也多较复杂且精确度低,短期内难于在气象站普及,一些测定土壤水分的先进技术尚在研究试用,因而找出精确可行的计算方法,特别是利用气象站现有观测资料提出一种简便的计算方法更属必要。本文仅就这个问题做一初步探讨。
First, the problem raised The study of farmland soil moisture variation and characteristics of the identification of crop moisture supply, the development of irrigation programs and understanding of farmland water budget are of great practical significance. However, the current system of measured soil moisture data is still not enough, the determination of the method is more complex and less accurate, short-term difficult to popularize in the weather station, some of the advanced technology for determination of soil moisture is still under study, so to find out the precise and feasible Calculation methods, especially the use of existing observations of weather stations to propose a simple calculation method is more necessary. This article only to do a preliminary discussion of this issue.