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土壤水分,又称土壤含水重或土壤湿度,它的变化直接左右着农作物的产量,测定土壤水分是进行灌溉试验的一项基本研究手段。长期以来我们一直采用恒温箱烘干法,但此法费时费力,还不能用来定点连续观测。因此近年来我国一些单位已研制出一些新的测定土壤水分的仪器有的经过鉴定已成批投入生产,并已用于科研和生产实践。这些仪器各有其适应场合和测定范围,各有优缺点。这里仅就我所了解到的情况,介绍几种。
Soil moisture, also known as soil moisture content or soil moisture content, its changes directly affect the crop yield, soil moisture measurement is a basic means of irrigation experiments. For a long time we have been using oven drying method, but this method is time-consuming and laborious, can not be used for continuous observation of fixed-point. Therefore, some units in our country have developed some new instruments for measuring soil moisture in recent years and have been put into mass production through appraisal and have been used in scientific research and production practice. Each of these instruments has its own application and measurement range, each with its own advantages and disadvantages. Here are just some of what I know.