包膜缓释肥料养分释放速率评价方法的探讨

将巴氏滤液管置于直径２ｃｍ、高２０ｃｍ的圆柱状玻璃管中，制成一个封闭式的自动连续过滤系统，将肥料置于该系统中，使上端进水，下端收集滤液，检测各瞬间滤液中养分的浓度，即可得到时间与养分释放速率的相关曲线。Ｈａｕｋｅ描述的包膜缓释肥料养分释放的第二阶段可进一步划分为三个阶段，可望在短时间内完成定量检测包膜肥料质量。

Evaluation Method for Nutrient Release Rate of Coated Slow Release Fertilizer

The Ba-filtration solution tube is put upside in the cylindrical glass tube with 2 cm diam and 20 cm high consists of a sealed way successive leaching filtrating system.The fertilizer is placed in the device,water is input from the top of the device,the filtrating solution is collected at its bottom and measured at regular time.i.e. we can describe the related curve of nutrient release rate to time.The second stage of nutrient release(described by Hauke)can be further divided into three stages through this method.The quantitative analysis of quality of coated fertilizer can be finished in short time.