钾钙肥中钾的缓释性研究  

Slowly-Releasing Property Study on Potassium in Potassium-Calcium Fertilizer

作　　者：江鸥[1] 朱云勤[1] 陈文建[1] 孟铁宏[1] 李令[1] 

机构地区：[1]贵州大学化学与化工学院,贵州贵阳550025

出　　处：《化肥设计》2009年第3期56-58,共3页Chemical Fertilizer Design

基　　金：贵州省科技成果重点推广计划项目;黔科合成字(2006)5005

摘　　要：对钾钙肥中有效氧化钾含量高是否影响钾钙肥的缓释性进行了研究;以水和2%柠檬酸液为浸取液,测定了氧化钾随时间变化的溶出率,模拟植物吸收养分实验,测定了氧化钾的累积溶出率;通过实验数据进行了统计回归分析;参照Trenkel提出的缓释肥标准验证了钾钙肥中钾的缓释性效果;研究了不同底面积及不同溶剂量对缓释性的影响。结果表明:钾在水中的溶出率小于在柠檬酸溶液中的溶出率;在模拟植物吸收养分的情况下,钾完全符合缓释标准;钾钙肥中的钾具有很好的缓释性。Study has been made on that whether the high content of effective potassium oxide in the potassium-calcium fertilizer had influence on the slowly-releasing property of potassium-calcium fertilizer; taking the water and 2% citric acid as maceration extraction liquid, measure the out-dissolving rate of potassium oxide varying with time, experiment was made in simulating plant absorbing the nutrient, measure accumulative out-dissolving rate of potassium oxide ; through experimental data statistical regression analysis was made; referring to slowly-releasing standard presented by Trenkel the slowly-releasing property effect of potassium in the potassium-calcium fertilizer has been proved; author has studied the influence of different bottom area and different solvent quantity on slowly-releasing property. Result indicates that the out-dissolving rate of potassium in water is smaller than in citric acid solution ; under condition of simulating the plant absorbing nutrient potassium satisfies completely the slowly-releasing fertilizer standard ; the potassium in potassium-calcium fertilizer has a good slowly-releasing property.

关 键 词：钾钙肥 缓释性 氧化钾 溶出率 

分 类 号：TQ449.1[化学工程—化学肥料工业]