早稻种子包衣肥的缓释性能研究

Slow-release Properties of Early-rice Seed-coating Fertilizer

为了探明早稻种子包衣肥的缓释性能,对用其制备的包肥种子中养分N、P、K的初期释放率、微分释放率和累积释放率进行了测定。研究结果显示:包衣肥中养分的初期释放率<40%,其中N的初期释放率最快,K次之,P释放得最慢;N、P、K的微分释放率显示包衣肥中养分能够均匀释放,能够满足早稻生长前期对养分的需求,提高肥料利用率,表明早稻种衣肥的缓释性能良好。

In order to explore the slow- release properties of early rice seed- coating fertilizer, the initialrelease rate, differential release rate and cumulative release rate of N, P and K in early rice seed- coatingfertilizer were determined. The results showed that the initial release rate of early rice seed-coating fertilizernutrients were less than 40%, the initial release rate of N was the fastest, then was that of K, and the releaserate of P was the slowest. The differential release rates of N, P and K showed that the nutrients of early riceseed-coating fertilizer released evenly, which could meet the early growth demand of early-rice for nutrientsand improve fertilizer use efficiency, so that the slow-release properties of early rice seed-coating fertilizerwere good.