第一主成分综合反映了区内土壤盐渍化程度，第二和第三主成分联合反映了土壤的碱性特征。
The first principal component can denote the degree of soil salinity, and the second and third principal component can denote the degree of soil alkalinity.
在碱性条件下，油脂会产生皂化反映，生成甘油以及脂酸盐，甘油以及脂酸盐的水溶性都对比好。
Under alkaline conditions, oil produces glycerol saponification, generating and Palmitic acid glycerol and fatty acid salt, salt water soluble contrast is better.
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