土壤水分含量测定方法研究

Research in Measuring Method of Soil Water Content

土壤水分含量是影响作物生长的重要因素,也是判断农业环境干旱的重要指标。由农业生产实际情况可知,作物生长的水资源条件最终是反映在土壤水分条件的好坏上。因此,需要充分了解土壤水分的各种时间尺度的演变特征和空间的立体分布,而更为重要的是了解作物主要生产期和关键需水期的土壤水分状况。目前,已有数十种土壤含水量快速测量方法。为此,介绍了近几十年来国内外关于土壤水分含量的各种测定方法,通过查阅大量资料对原理及其优缺点进行了分析与比较,并对其前景进行了展望。其中,有些测量方法存在着许多缺点和弊端,所以寻求一种精度高、可靠性强、成本低、无破坏以及快速的土壤含水量测定技术的工作迫在眉睫。

The soil water content is an important factor effecting crop growth, and it is also a key target to judge agriculture environment drought. By the actual agriculture produced to know, the water resources condition of crop growth is finally reflection in the conditional quality of the soil water. For this, needed to full understand various evolvement characteristic of time dimensions and stereoscopic distribute of space of soil water, but the more important is to understands the soil water condition of mainly.produce data of farm crop and key needed water period. So, to understand soil water content has become the focus which agriculture herding produce pay attention to increasingly in time, at the same time, how fast, valid, accurate measuring soil water content is the hot issue of researcher. Now, there are amount of soil water content to measuring the method quickly. This paper introduced the national and international various measuring method concerning soil water content in the last several decades. We read a great of data as to it＇s principle and its advantage and disadvantage carried on analysis and compare, and as to it＇s the foreground carried on an outlook. But some of measuring method exist a lot of weakness and irregularity. So it is the most urgent to look for a kind of measuring technical work of soil water content which the accuracy is high, the credibility is strong and the cost is low.