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作 者:胡克伟[1]
机构地区:[1]辽宁农业职业技术学院科技处,辽宁营口115009
出 处:《北方园艺》2014年第4期152-154,共3页Northern Horticulture
基 金:辽宁省高等学校优秀人才支持计划资助项目(LJQ2012103)
摘 要:以膨润土为试材,采用恒温振荡试验初步研究了天然膨润土对水溶性磷、钾肥在设施土壤中迁移转化的影响,以期提高水溶性磷钾肥利用率的途径。结果表明:与对照相比添加膨润土显著降低了水溶性磷和水溶性钾的含量,同时增加了土壤有效钾和速效磷的含量。在富磷的设施土壤中添加膨润土提高了有效磷含量,减缓了磷无效化的进程;膨润土在设施土壤中作为钾库,可调节土壤钾素水平。Taking native bentonite as test material, batch-experiments were conducted to preliminarily study the effect of native bentonite on the unavailable process of water dissolvable phosphorus and potassium in greenhouse soil in order to improve the nutrient efficiency. The results showed that with the bentonite additions, the concentration of waterphosphorus and water-potassium in solution decreased compared with the control, the available potassium and available phosphorus concentrations increased. In greenhouse soil. bentonite increased the available phosphorus concentration and decreased the probability of phosphorus pollution in greenhouse soils with high application of phosphorus fertilizer or high phosphorus concentration. For potassium, native bentonite could be as a sink, which maintained a good potassium concentration.
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