Effects of amino acid value-added phosphate fertilizer on phosphorus availability and enzyme activity in yellow cinnamon soil
In order to clarify the effects of amino acid value-added phosphate fertilizer on phosphorus availability and related enzyme activities in yellow cinnamon soil,the indoor soil culture method was adopted in this study.Five treatments were set up:no phosphate fertilizer(CK),ordinary phosphate fertilizer(P)and amino acid value-added phosphate fertil-izer with 0.5%amino acid(AP0.5),amino acid value-added phosphate fertilizer with 1.0%amino acid(AP1.0)and ami-no acid value-added phosphate fertilizer with 5.0%amino acid(AP5.0).Soil phosphorus availability and alkaline phospha-tase activity were measured in different soil layers and different incubation time.The results showed that the soil pH of AP0.5,AP1.0 and AP5.0 treatments was significantly lower than that of CK and P treatment in 0-20 cm soil layer from the 7th day of culture.From the 7th day of culture,the pH of 40-60 cm soil layer was significantly lower than that of CK,and reached the lowest value on the 60th day.The contents of available phosphorus and Ca-P in soil were significantly higher than those in CK.The promoting effect of amino acid value-added phosphate fertilizer on soil alkaline phosphatase activity in different soil layers was different.In general,the effect of amino acid value-added phosphate fertilizer with 5.0%amino acid addition was better.The results of this study provide a theoretical basis for the activation of phosphate fertilizer by small molecular substances.
万方数据
维普
