中国水稻科学

中国水稻科学 ›› 2012, Vol. 26 ›› Issue (2): 189-196.DOI: 10.3969/j.issn.10017216.2012.02.008

• 研究报告 • 上一篇    下一篇

不同施氮量和栽插密度下三角形强化栽培杂交稻抗倒伏性与群体质量的关系

孙永健1,2, 陈宇1,2 ,孙园园1,3  ,徐徽1,2,许远明4,刘树金1,2,马均1,2,*   

  1. 1四川农业大学 水稻研究所，  四川 温江 611130； 2农业部西南作物生理生态与耕作重点实验室 四川 温江 611130； 3四川省 农业气象中心，  四川 成都 610071；4眉山市东坡区农业局，  四川 眉山  620032；
  • 收稿日期:2011-07-25 修回日期:2012-01-04 出版日期:2012-03-10 发布日期:2012-03-10
  • 通讯作者: 马均1,2,*
  • 基金资助:

    国家科技支撑计划资助项目(2011BAD16B05)；中国气象局西南区域气象中心2010年区域重大项目(20107)；四川省教育厅资助科研项目(10ZA047)； 四川省育种攻关专项（2006YZgg28) 。

Relationship Between Culm Lodging Resistance and  Population Quality of Hybrids    under  TrianglePlanted System of Rice Intensification  at  Different Nitrogen Application Rates and Planting Densities

SUN Yongjian 1,2, CHEN Yu 1,2, SUN Yuanyuan 1,3, XU Hui 1,2, XU Yuanming 4, LIU Shujin 1,2, MA Jun 1,2,*   

  1. 1 Rice Research Institute, Sichuan Agricultural University, Wenjiang 611130, China; 2  Key Laboratory of Crop Physiology, Ecology, and Cultivation   Southwest, Ministry of Agriculture,Wenjiang 611130, China 3 Agrometeorological Center of Sichuan Meteorological Bureau, Chengdu 610071, China; 4 Dongpo Agricultural Bureau, Meishan 620032, China;
  • Received:2011-07-25 Revised:2012-01-04 Online:2012-03-10 Published:2012-03-10
  • Contact: MA Jun1,2,*

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被引次数

85

摘要： 以杂交水稻组合Ⅱ优498为材料，在三角形强化栽培(TSRI)条件下，研究了施氮量和栽插密度对水稻群体质量及抗倒伏能力的影响，并探讨了主要群体质量指标与茎秆抗倒伏性及产量间的关系。结果表明，TSRI下，施氮量及栽插密度对水稻产量、群体质量以及茎秆基部各节间抗倒伏能力均存在显著的调控作用。施氮量为150 kg/hm2与栽插规格40 cm×40 cm配合可提高结实期叶面积指数(LAI)、群体透光率，协调茎秆基部各节间弯曲力矩与抗折弯矩，缓和高产栽培的穗粒矛盾，显著提高籽粒产量；而施氮量增加至225 kg/hm2，应适当降低栽插密度，来缓解群体质量指标的恶化，降低倒伏指数，栽插规格50 cm×50 cm为宜。相关性分析表明，不同施氮量和栽插密度下水稻群体质量指标与茎秆基部各节间抗倒伏能力显著或极显著相关；结合产量表现，尤以齐穗期、齐穗后30 d中部的群体透光率以及齐穗后30 d的根系伤流量对水稻产量及抗倒伏性影响显著。

关键词: 水稻, 三角形强化栽培, 施氮量, 栽插密度, 抗倒伏性

Abstract: The effects of nitrogen (N) application rate and planting density on population quality and culm lodging resistance of rice were investigated with hybrid rice combination Ⅱyou 498 as material under triangleplanted system of rice intensification (TSRI), and correlation of population quality with culm lodging resistance and  grain yield was analyzed. There was an obvious regulatory effect of N application rate and planting density on grain yield, population quality, and lodging resistance of rice culm under TSRI. Compared with other treatments, 150 kg/hm2 N application rate coupled with the suitable planting density (40 cm × 40 cm) improved leaf area index (LAI) and light transmission rate in rice population, coordinated bending moment and breaking resistance of basal internodes, alleviated contradiction of panicle and grain, and increased grain yield. At the nitrogen application rate of 225 kg/hm2, planting density should be reduced  to alleviate deterioration of population quality index and decreased lodging index. The suitable planting density was 50 cm × 50 cm. Correlation analysis indicated population quality was significantly  correlated with internode lodging resistance and yield. Middle part light transmission rate in rice population at full heading and 30 days after full heading, and amount of sap flow of rice root at 30 days after full heading   might be indicators for grain yield and culm lodging resistance.

Key words: rice, triangleplanted system of rice intensification (TSRI), N application rate, planting density, lodging resistance

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