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土壤的持水特性决定于土壤物理性质及物理化学性质。田间持水量是土壤保持水分的一种基本特性,许多学者进行过广泛的研究。 本文主要根据长江流域一些地区的田间实测结果分析其与容重、机械组成的关系,并由统计方法得出田间持水量与容重相关的经验关系式。这些相关特性可以从土壤持水特性上得到解释。根据该关系式,已知土壤容重与土壤物理粘粒(<0.01毫米的粒径)含量百分率可以计算出田间持水量。 一、土壤田间持水量与土壤容重、机械组成的统计关系
Soil water holding capacity depends on the soil physical and physical and chemical properties. Field water holding capacity is one of the basic characteristics of soil water retention, many scholars have conducted extensive research. Based on field measurements in some areas of the Yangtze River basin, this paper analyzes the relationship between bulk density and mechanical composition, and obtains empirical correlations between field water holding capacity and bulk density by statistical methods. These related properties can be explained from the soil water retention characteristics. According to the relationship, it is known that the soil water content can be calculated from the percentages of soil bulk density and soil physical clay (<0.01 mm particle size). First, the soil field capacity and soil bulk density, mechanical composition of the statistical relationship