| 籼稻品种间氮素吸收利用的差异及其对产量的影响 |
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| 引用本文： | 张岳芳,王余龙,张传胜,董桂春,杨连新,黄建晔,陈培峰,龚克成.籼稻品种间氮素吸收利用的差异及其对产量的影响[J].江苏农业学报,2006,22(4):318-324. |
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| 作者姓名： | 张岳芳 王余龙 张传胜 董桂春 杨连新 黄建晔 陈培峰 龚克成 |
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| 作者单位： | 扬州大学江苏省作物遗传生理重点实验室,江苏,扬州,225009 |
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| 摘 要： | 2001~2002年,在群体水培条件下,以不同年代育成的籼稻代表品种国内88个和国外122个为材料,成熟期测定植株的干物重(包括根系)、全氮含量及产量,分析籼稻品种间成熟期氮素累积量、氮素干物质生产效率和氮素籽粒生产效率的差异及其对产量的影响。结果表明:成熟期氮素累积量、氮素籽粒生产效率和氮素干物质生产效率,品种间差异很大,均达到极显著水平,其中,氮素累积量的差异明显大于氮素籽粒生产效率,氮素籽粒生产效率的差异又明显大于氮素干物质生产效率。相关分析表明,成熟期氮素累积量、氮素籽粒生产效率与籼稻品种的产量水平关系密切,氮素干物质生产效率与籼稻品种的产量水平关系不密切。逐步多元回归分析表明,成熟期氮素累积量和氮素籽粒生产效率对籼稻品种的产量水平均有显著影响(R2=0.957~0.974),提高成熟期氮素累积量和氮素籽粒生产效率均可提高籼稻品种的产量水平。通径分析显示,籼稻成熟期氮素累积量对产量的直接影响比氮素籽粒生产效率大40%~70%。作者认为,籼稻品种的选育应在保持较高氮素累积量的基础上,重点改良提高氮素籽粒生产效率,有利于实现籼稻品种高产与高效的有机统一。
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| 关 键 词： | 籼型水稻 品种 氮素累积量 氮素干物质生产效率 氮素籽粒生产效率 产量 |
| 文章编号： | 1000-4440（2006）04-0318-07 |
| 收稿时间： | 2006-04-06 |
| 修稿时间： | 2006年4月6日 |
Differences of Nitrogen Absorption and Utilization and Their Influences on Grain Yield of Conventional Indica Rice Cultivars |
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| ZHANG Yue-fang,WANG Yu-long,ZHANG Chuan-sheng,DONG Gui-chun,YANG Lian-xin,HUANG Jian-ye,CHEN Pei-feng,GONG Ke-cheng.Differences of Nitrogen Absorption and Utilization and Their Influences on Grain Yield of Conventional Indica Rice Cultivars[J].Jiangsu Journal of Agricultural Sciences,2006,22(4):318-324. |
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| Authors: | ZHANG Yue-fang WANG Yu-long ZHANG Chuan-sheng DONG Gui-chun YANG Lian-xin HUANG Jian-ye CHEN Pei-feng GONG Ke-cheng |
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| Institution: | Key Lab of Crop Genetics and Physiology of Jiangsu Province , Yangzhou University , Yangzhou 225009 , China |
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| Abstract: | Dry matter weight(including root system),nitrogen(N) content and grain yield of eighty eight and one hundred twenty two solution-cultured conventional indica rice cultivars were measured at maturity in 2001 and 2002 to study the differences of N absorption and utilization and their influences on grain yield in the tested cultivars.Significant differences(P<0.01) in N accumulation,NUEg(N use efficiency for grain yield) and NUEp(N use efficiency for the plant) among cultivars were found at maturity.Difference among cultivars in N accumulation was larger than that of NUEg,and difference in NUEg was greater than that of NUEp.Grain yield of conventional indica rice cultivars was not closely related to NUEg but to N accumulation and NUEg.Polynomial stepwise regression analysis showed that grain yield was significantly influenced by N accumulation and NUEg at maturity(R~(2)=0.957-0.974) which indicated that higher yield level could be enhanced by improving N accumulation and NUEg of conventional indica rice cultivars.Through path analysis,it was also found that the effect of N accumulation on grain yield was more important than NUEg.The results mentioned above sugges ted that based on high N accumulation at maturity,it was important to improve NUEg to coordinately increase yields and profit. |
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| Keywords: | indica rice cultivar nitrogen accumulation nitrogen use efficiency for the plant nitrogen use efficiency for grain yield grain yield |
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