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土壤颗粒分析,是测定土壤固体组成中的各种粒径土粒的百分含量,全国第二次土壤普查决定采用简易比重法进行测定分析.分散的各级粒径的土粒,在不同的温度下,以不同的速度在悬液中下沉,悬液的密度也随土粒的下沉而减少.因此,可在不同的温度下,根据土粒的沉降时间.用土壤比重计测出所需小于某粒径土粒的含量,再经过必要的校正计算,即可求得小于某粒径土粒的含量(%).求得测定结果后,再按卡庆斯基质地分类法查找土壤质地名称.现将提高测定精确度的注意问题分述如下:
Soil particle analysis is the determination of soil solid composition of the various particle size of soil particle content, the second national soil survey decided to use the simple gravity method for the determination of analysis of scattered particle size at all levels of soil particles in different At different temperatures, the density of the suspension decreases with the sedimentation of the soil at different velocities, so it can be measured at different temperatures according to the sedimentation time of the soil. Less than the content of a certain particle size of soil particles, and then through the necessary correction calculation, can be obtained less than a particle size soil particle content (%). After the determination of the results, Soil texture name now will improve the measurement accuracy of the attention issues are as follows: