沸石对水溶性磷钾肥在设施土壤中迁移转化影响研究

摘要

In order to improve the nutrient efficiency , batch-experiments were conducted to preliminarily study the effects of native clinoptilolite on the unavailable process of water dissolvable phosphorus and potassium in greenhouse soil. Results show that with the clinoptilolite additions, the concentration of water-phosphorus almost no change and potassium in solution decreases, The available potassium and available phosphorus concentrations in the treatments with clinoptilolite addition increase in contrast with no-clinoptilolite addition at t he low and high level of monopotassium phosphorus. In greenhouse soil, clinoptilolite increases the available phosphorus concentration and decreases the probability of phosphorus pollution in soils with high application of phosphorus fertilizer or high phosphorus concentration. For potassium, native clinoptilolite can be as a sink, which maintains a good potassium concentration.%为了寻求提高水溶性磷钾肥利用率的途径，本文采用恒温振荡试验初步研究了天然沸石对水溶性磷、钾肥在设施土壤中迁移转化的影响。结果表明：与对照相比添加沸石对水溶性磷含量影响不明显，但显著降低了水溶性钾含量，同时增加了土壤速效磷和速效钾的含量。在富磷的设施土壤中添加沸石提高了速效磷含量，减缓了磷无效化的进程；沸石在设施土壤中作为钾库，可调节土壤钾素水平。