高分子缓释化肥的缓释性能研究

对一种含氮、磷、钾三种营养元素的高分子型缓释化肥—MSF,分别在去离子水及土壤溶液中进行了养分释放规律的研究.实验结果显示:在120天内,MSF在去离子水中失重不到40%,氮、磷、钾三种营养元素也只分别溶出了30%,28%和38%;而在土壤溶液中,在120天内,MSF失重接近100%,氮,磷,钾三种营养元素基本完全转化为小分子物质溶入土壤溶液中.实验结果表明:(1)MSF初期溶出率较低,能显著的减少淋溶损失.(2)MSF能在土壤溶液中完全降解,养分的可利用率高.(3)MSF水解反应缓慢,性能较为稳定,便于存放和使用.

Slow-release Property of a Macromolecular Slow-release Fertilizer

The slow-release property of a macromolecular slow-release fertilizer(containing N,P,K)—MSF in de-ionized water and soil solution was studied.Experimental results showed that in 120 days,the weight loss of MSF is less than 40 %,and the nutrient elements of N,P,K are dissolved only 30 %,28 % and 38 % respectively in de-ionized water.But in soil solution at the same time period,the weight loss of MSF is nearly 100 %,and the nutrient elements of N,P,K are almost completely transferred into small molecules dissolved into soil solution.Experimental results indicated that:(1) Preliminary solubility of MSF is low,which can significantly reduce leached damage.(2) MSF is degraded completely in soil solution,utilization ratio of nutrient elements is high.(3) Hydrolytic reaction of MSF is low,so it is convenient to use and store the fertilizer.