Abstract:

Reasonable application of nitrogen fertilizer is the important measure for high yield cultivation of rice. In order to promote the popularization of Shuyou 217, the effects of different nitrogen amounts and urea types on yield and its components were studied in the double cropping area of rice and wheat in Chengdu Plain in 2016 and 2017. The results showed that the different nitrogen amounts, urea types and their interaction significantly affect the yield of Shuyou 217. The yield was not increased synchronously with the increasement of nitrogen fertilizer, and there were significant differences in yield of different types of urea, low nitrogen amounts of humic acid urea could also obtain higher yield. Therefore, in the production of Shuyou 217, the N-fertilizer management with humic acid urea and  pure nitrogen 8 kg/667 m2, base fertilizer ∶ tiller fertilizer ∶ panicle fertilizer were 6∶2∶2, could obtain better yield and environmental effect.

Key words: rice, nitrogen fertilizer amounts, urea types, yield, yield component

摘要：

合理施用氮肥是水稻高产栽培的重要措施。为促进蜀优217的推广，笔者于2016-2017年在成都平原稻麦两熟区开展了不同氮肥用量与尿素类型对其产量及其构成因素影响的研究，以集成蜀优217高产高效栽培技术。结果表明，不同氮肥用量、尿素类型及其互作均极显著影响蜀优217产量。水稻产量未能与氮肥施用量同步增加，不同类型尿素处理间水稻产量差异明显，施用腐植酸尿素在低氮水平也可以获得较高产量。因此，在蜀优217生产上，可选择腐植酸尿素，以纯氮8 kg/667 m2、底肥∶蘖肥∶穗肥=6∶2∶2的运筹方式，可获得较好的产量和环境效应。

关键词: 水稻, 氮肥用量, 尿素类型, 产量, 产量构成