作物学报2012，Vol.38Issue(6)：1097-1106,10.DOI:10.3724/SP.J.1006.2012.01097
三角形强化栽培模式下氮肥运筹对Ⅱ优498产量及氮肥利用的影响
Effects of Nitrogen Fertilizer Management on Yield and Nitrogen Use Efficiency of Eryou 498 in Triangle-Planted System of Rice Intensification
摘要
Abstract
Hybrid rice Eryou 498 was used to investigate the effects of nitrogen (N) fertilizer management on leaf area, photosyn-thetic rate in productive phase, and also dry-matter accumulation and its transportation in triangle-planted system of rice intensification (TSR1) with appropriate seedling age and density. At the same time, the effects of dry-matter accumulation before anthesis and its transportation and dry-matter accumulation after anthesis on yield formation were also explored a N fertilizer management which could both increase yield and reduce the N waste. The results showed that in TSRI N fertilizer management had significant effects on leaf area index (LAI) and photosynthetic rate except the LAI in waxy ripening stage; with the increase of N rate and postponing N application, net photosynthetic rate in flag leaf in full heading stage and waxy ripe stage increased significantly; LAI in productive phase exhibited a parabola mostly with the increase of N rate and postponing N application. In TSRI, N rate and ratio of application both enlarged total glumes to increase yield. At the same time, N rate enlarged 1000-grain weight and ratio of application improved seed-setting rate to increase yield respectively. In TSRI, dry-matter accumulation before anthesis, dry-matter of transportation, and transportation rate of dry-matter had significantly positive correlation with yield respectively. The treatment which N rate was 150 kg ha-1and panicle fertilizer was 30% of the whole N fertilizer enlarged dry-matter accumulation before anthesis and dry-matter of transportation significantly to reach maximum yield. It also improved N agronomy efficiency and N physiology efficiency significantly, so it was the best combination which could both increase yield and reduce the waste of N fertilizer to the maximum degree.关键词
水稻/三角形强化栽培/施氮量/氮肥运筹/氮肥利用率Key words
Rice/ Triangle-planted system of rice intensification (TSRI)/ N rate/ N fertilizer management/ N use efficiency引用本文复制引用
杨志远,胡蓉,孙永健,徐徽,许远明,马均..三角形强化栽培模式下氮肥运筹对Ⅱ优498产量及氮肥利用的影响[J].作物学报,2012,38(6):1097-1106,10.基金项目
本研究由国家粮食丰产科技工程项目(2011BAD16B05)资助. （2011BAD16B05）
