【摘要】 土柱淋溶模拟实验研究不同种类磷肥施用对磷素淋失的影响.结果表明,施用等磷量的过磷酸钙(SSP)、钙镁磷肥(CMP)、磷铵(AP),土柱淋出液的TP、DTP浓度、累积淋失量和净损失量均表现为AP>SSP>CMP,施用3种磷肥均提高了各层土壤Olsen-P含量,Olsen-P增加量的大小顺序是AP>SSP>CMP.因此,酸性菜园在磷肥品种选择上应采用钙镁磷肥,除可以减少磷素淋失外,还可改良土壤pH,提供蔬菜生长所需的钙、镁营养.更多还原

【Abstract】 An indoor simulating experiment was conducted with repacked soil columns for studying the effect of different phosphate fertilizers application on phosphorus leaching in vegetable soils.Results showed that the concentration and total amount of TP and DTP in the leachates of soil columns fertilized calcium super-phosphate(SSP),calcium magnesium phosphate(CMP) or ammonium phosphate(AP) in the same amount of phosphorus were in an order: AP>SSP>CMP.The effects of different phosphorus fertilizers application on increasing the content of Olsen-P in every layers of soil was in the following order: AP>SSP>CMP.It was suggested that calcium magnesium phosphate should be used in acidic vegetable soils to reduce phosphorus leaching,improve soil pH and provide calcium,magnesium nutrition which vegetable needs.更多还原