关键词: 树脂包膜尿素, 水稻, 产量, 氮肥利用率

Abstract: Field plot experiment was conducted to investigate the effects of application of controlledrelease polyolefin coated urea on yield and nitrogen utilization rate of rice. The results showed that application of controlled release polyolefin coated urea could increase yield and nitrogen utilization rate of rice significantly. The highest yield and economic benefit of rice was the treatment with amount of 70% controlled release polyolefin coated urea and 30% urea applied which was added up to 180kg/ha nitrogen as base fertilizer, the yield increased by 5.6%~30.5% than other treatments. While the highest nitrogen utilization rate of rice was the treatment with amount of 60% controlled release polyolefin coated urea as base fertilizer and 40% urea applied as top dressing which was add up to 126kg/ha nitrogen, the yield of which was not lower than urea applied. Therefore application of controlled release polyolefin coated urea could decrease the amount of nitrogen fertilizer, ensuring the yield of rice, and protecting the environment.

Key words: Controlled release polyolefin coated urea, Rice, Yield output, Nitrogen utilization rate