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 m...