控释肥膜壳对土壤酶活性及微生物量碳氮磷的影响

Effects of Controlled-Release Fertilizer Residual Coating on Enzyme and Microbial Biomass Carbon Nitrogen Phosphorus

选用硫膜和树脂膜两种肥料膜壳,每种设置3个浓度梯度,研究了控释肥膜壳对土壤酶活性及微生物量碳氮磷的影响。结果表明,施用硫膜和树脂膜一定程度上对土壤生物学性质产生了影响。膜壳对土壤酶活性的影响主要表现在对脲酶和过氧化氢酶活性上,而对土壤磷酸酶活性影响不大。成熟期施用硫膜和树脂膜处理显著提高了土壤脲酶活性,这与结荚期有所不同,说明硫膜能提高花生成熟期土壤脲酶活性。树脂膜和硫膜处理均以中等量(2 g/kg)处理时微生物量碳和氮含量最大,施用控释肥残膜处理显著降低了微生物量磷含量。

Sulfur film and resin film were used in this study, and each membrane shell was set by three concent.ration gradients. We studied the effects of the membrane shell on soil enzyme activities and microbial biomass carbon nitrogen and phosphorus. The results showed that application of sulfur film and resin film caused a certain extent effect on soil biological properties and the membrane shell caused a significantly effect on the urease and catalase activities, and little effect on soil phosphatase activity. At maturity stage, the sulfur mem- brane treatments significantly increased soil urease activity, which was different from the podding stage. was biggest of microbial biomass carbon and nitrogen content when the aoplication rate was moderate There （2g/kg）. In addition, application of sulfur film and resin film significantly reduced the microbial biomass phosphorus content.