A Suggested Fractionation of Inorganic Phosphorus at Various Types of Slope Soil Under Different Restoration Modes

摘要

. This paper selected various types of slope soil under different restoration modes of Xiangjiaba hydropower construction to study the fractionation of inorganic phosphorus. The results showed that the content of inorganic phosphorus was lower. In seven different types of slop soil, the content of total inorganic phosphorus was between 254.43 mg·kg~(-1) and 992.98 mg·kg~(-1), and accounted for between 22.60% and 47.12%. The content of soil total inorganic phosphorus and the raito of Water-soluble phosphorus, Al-P to total phosphorus increased as the content of soil total P increase, but the ratio of soil O-P, Ca-P to total phosphorus decreased. The Water-soluble phosphorus and Al-P in Vegetation-growing concrete gunning were the highest, the O-P in Natural secondary forests were the highest and Ca-P in External-soil spray seeding were the highest among all the types of slope soil.