土壤2017，Vol.49Issue(4)：679-684,6.DOI:10.13758/j.cnki.tr.2017.04.006
水氮管理对优质杂交中稻旌优127产量及氮肥利用率的影响
Effects of Water and Nitrogen Management on Yield and Nitrogen Use Efficiency of Good Quality Hybrid Rice Jingyou 127
摘要
Abstract
In order to fully realize the yield potential of good quality rice and the efficient utilization of water and nitrogen (N) resources, we explored the effects of water management (W), N application level (N) and application method (D) as well as their interaction on rice yield, grain structure and N use efficiency by a field experiment with the good quality hybrid rice Jingyou127 as material. The results showed that the yield of Jingyou 127 was extremely significant effected by W, N and the interactions of W×N, W×D, N×D and W×N×D. The effect of D on yield was close to the significant level (P=0.0505), the yield of Jingyou127 was highest when 75% N as base fertilizer and 25% as panicle fertilizer in wet-shallow alternate irrigation. W, N, D and their interactions had different effects on grain structure. Path analysis showed that the effective panicles and spikelets per panicle were the main factors of the yield. Except D and W×N,the other factors and their interactions had significant effects on N agronomic efficiency. Under the wet-shallow alternate irrigation, N agronomic efficiency was significantly lower than that under conventional irrigation, and it significantly decreased with the increase of N application level at postponing N application treatment, but little difference under conventional N application treatment, which had the opposite effect. Except D, the other factors and their interactions had significant effects on the partial factor productivity of applied N. Under the wet-sallow alternate irrigation, the partial factor productivity of applied N was significantly higher than that under conventional irrigation, and it significantly decreased with the increased N application level. Wet-shallow alternate irrigation, 100 kg/hm2 N (75% as base fertilizer and 25% as panicle fertilizer) is the best model of water-nitrogen coupling management.关键词
优质稻/水氮管理/产量/氮肥利用率Key words
Good quality rice/Water and nitrogen managements/Yield/Nitrogen use efficiency分类
农业科技引用本文复制引用
张林,徐富贤,熊洪,蒋鹏,周兴兵,朱永川,刘茂,郭晓艺..水氮管理对优质杂交中稻旌优127产量及氮肥利用率的影响[J].土壤,2017,49(4):679-684,6.基金项目
国家粮食科技丰产工程项目(2013BAD07B13)、国家水稻产业体系项目(CARS-01)、四川省水稻育种攻关项目和四川省财政基因工程项目资助. （2013BAD07B13）
