关键词: 种质资源鉴定和评价, 种质资源鉴定和评价

Abstract: The slowed release fertilizer (SRF) test on rice was carried for screening the SRF formula of advisable local circumstances, reducing fertilizer amount and increasing economic benefit. The SRF (N:P2O5: K2O=24:8:10) was mixed with coated urea, phosphate and potassium fertilizer in according to the principle of balance fertilization. The effects of different amount of SRF on rice till dynamic development yield and N-absorption were studied. Results showed that the SRF possessed balancing and slow releasing nutrients, the number of productive tillers, grains per panicle and 1000-grain weight improved a lot, and the grain setting rate rose markedly. Comparing with the normal fertilization, T1 (the same amount of nitrogen treatment) rice yield increased 7.06%, T2 (the same input cost of fertilizer treatment) rice yield increased 0.66%. The SRF reduced nitrogen application rates by 20% under the same input cost of fertilizer treatment. The nitrogen use percent of SRF increased by 8.16% compared to the normal fertilization, the environmental profit was remarkable.