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作物学报 ›› 2010, Vol. 36 ›› Issue (06): 1011-1021.doi: 10.3724/SP.J.1006.2010.01011

• 耕作栽培·生理生化 • 上一篇    下一篇

水稻氮高产高效与低产低效两类品种株型特征差异研究

张庆1,殷春渊1,张洪程1,2,*,魏海燕1,2,马群1,杭杰1,李敏1,李国业1   

  1. 1扬州大学江苏省作物遗传生理重点实验室;2农业部长江流域稻作技术创新中心,江苏扬州225009
  • 收稿日期:2009-10-21 修回日期:2010-02-08 出版日期:2010-06-12 网络出版日期:2010-04-14
  • 通讯作者: 张洪程, Tel: 051487979220
  • 基金资助:

    本研究由国家自然科学基金项目(30971732)和国家粮食丰产科技工程项目(2006BAD02A03)资助。

Differences of Plant-Type Characteristics between Rice Cultivars with High and Low Levels in Yield and Nitrogen Use Efficiency

ZHANG Qing,YIN Chun-Yuan,ZHANG Hong-Cheng*,WEI Hai-Yan,MA Qun,HANG Jie,LI Min,LI Guo-Ye   

  1. 1Key Laboratory of Crop Genetic and Physiology of Jiangsu Province,Yangzhou University;2Key Laboratory of Crop Physiology,Ecology and Cultivation in Middle and Lower Reaches of Yangtze River,Ministry of Agriculture Yangzhou 225009,China
  • Received:2009-10-21 Revised:2010-02-08 Published:2010-06-12 Published online:2010-04-14
  • Contact: ZHABG Hong-Chen,Tel:051487979220

摘要:

以氮利用高产高效型和低产低效型的12个粳稻品种的大田试验研究了225 kg hm-2纯氮水平下株型特征的类型间差异,以及株型特征、倒伏性状、产量和氮肥利用率的相互关系。结果表明,水稻上三叶的叶长、叶披垂度,氮高产高效型品种显著低于氮低产低效型,平均分别低9.29%、65.3%;上三叶的叶宽、群体LAI、有效LAI、高效LAI和比叶重,氮高产高效型平均分别比氮低产低效型高29.25%、8.27%、13.32%、6.66%和5.82%。相对于氮低产低效型品种,氮高产高效型品种植株茎秆节间配置合理,抗倒能力增强。水稻的产量、氮肥利用效率与植株上三叶的叶长、叶披垂度均呈显著或极显著负相关,与上三叶的叶宽、群体LAI、有效LAI、高效LAI和比叶重呈显著或极显著正相关,与抗折力、弯曲力矩和秆型指数呈显著或极显著正相关。尤其是剑叶、倒三叶的叶长和叶宽对氮素利用效率的作用较大。说明良好的株型结构是氮肥利用效率提高的前提。

关键词: 水稻, 株型特征, 氮效率, 产量

Abstract:

A field experiment with 225 kg ha-1 N fertilizer application was carried out in 2006 and 2007 on the farm of Yangzhou university, Jiangsu province, China. Using 12 rice genotypes (six N-efficient and six N-inefficient) selected from 120 rice cultivars grown in Yangzhou during 2004 and 2005 to investigate the relationship among the plant-type characteristics, N use efficiency and yield performance. The results showed that the top three leaves length and drop-angle of high yield and N-efficient rice genotypes were 9.29%, 65.3% lower than those of the low yield and N-inefficient ones, and the width of the top three leaves, population LAI, valid LAI, high valid LAI and LW/LA(leaves weight/leaves area) of the former of were 29.25%, 8.27%, 13.32%, 6.66%, and 5.82% higher than those of the latter on average respectively. The high yield and N-efficient genotypes had higher lodging resistance capability and more reasonable distribution for the length of internodes on stem than the low yield and N-inefficient ones. Yield and N use efficiency negatively correlated (significantly at P<0.05 or P<0.01) with the length and drop-angle of the top three leaves, while positively correlated(significantly at P<0.05 or P<0.01)with the width of the top three leaves, population LAI, valid LAI, high valid LAI, SLW, anti-broken strength, bender moment, and lodge index. Especially, the length and width of the flag and top 3rd leaves played an important role in the N use efficiency. It was indicated that good plant-type structure is a prerequisite for N use efficiency.

Key words: Rice, Plant-type characteristics, N use efficiency, Yield

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