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自1979年以来,黔南有12县1市开展了土壤普查,初步查清了土壤中氮磷钾的含量,现将三要素富缺原因综述如下。 一、母岩氮磷钾元素与土壤的关系 黔南的土壤普查结果表明(表1):一般情况是有什么样的岩石将会形成什么样的土壤,土壤中某一物质含量多少与成土母岩物质的成分呈因果关系。如土壤中的有机态磷含量约占全磷的10～50％,与土壤有机质含量有密切关系;而土壤中的无机态磷约占全磷的50～90％,则主要与成土母岩有密切关系。据地质勘探资料,含磷岩层在震旦系上统陡山组和寒武系下统牛蹄塘组、渣拉沟组
Since 1979, Qiannan has 12 counties and 1 cities to carry out soil census, initially identified the content of nitrogen, phosphorus and potassium in the soil, now summarized the reasons for the lack of three elements are as follows. First, the relationship between the parent rock nitrogen, phosphorus, potassium and soil Qiannan soil survey results (Table 1): The general situation is what kind of rock will form what kind of soil, the amount of a substance in the soil and soil formation The composition of the parent rock material has a causal relationship. For example, the content of organic phosphorus in soil accounts for about 10-50% of the total phosphorus, which is closely related to the content of organic matter in the soil. The content of inorganic phosphorus in the soil accounts for 50-90% of the total phosphorus, There is a close relationship. According to geological prospecting data, the phosphorous strata are distributed between the Sinian Upper Doushan Formation and the Lower Cambrian Niutitang Formation and the Resangao Formation