不同基因型水稻氮效率与生育后期根系性状关系研究

以两优培九、扬稻6号、珍汕97B、香晚、猫牙、丝苗、Ceys和IR4共8个水稻品种为供试材料,在盆栽条件下,采用4个氮肥水平,研究了抽穗期与成熟期主要根系性状品种间的差异及其与产量、氮效率的关系.结果表明,品种间水稻氮素吸收总量、干物质积累量差异显著;不同品种间根系性状差异显著,抽穗期氮吸收效率高的品种其不定根干重及吸收面积较大;根系性状与干物质重、吸氮量和稻谷产量成正相关.氮素吸收效率高的品种在生育前期有较大的根于重与根表面积;而氮素利用效率高的品种表现为在生育中期与后期均有较高的根系活性,增加了生育后期的干物质及氮素的积累量与转运量,氮素籽粒生产效率较高....

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Published in广东农业科学 Vol. 42; no. 11; pp. 23 - 28
Main Author 王强 李炜 贺帆 曾建敏 孙昊 吴伟 廉云 王凯
Format Journal Article
LanguageChinese
Published 华中农业大学作物生理与栽培研究中心,湖北武汉430070 2015
广西农业科学院水稻研究所,广西南宁530007%华中农业大学作物生理与栽培研究中心,湖北武汉,430070
Subjects
品种
根系
氮效率
水稻
水稻
品种
氮效率
根系
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ISSN1004-874X

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Summary:以两优培九、扬稻6号、珍汕97B、香晚、猫牙、丝苗、Ceys和IR4共8个水稻品种为供试材料,在盆栽条件下,采用4个氮肥水平,研究了抽穗期与成熟期主要根系性状品种间的差异及其与产量、氮效率的关系.结果表明,品种间水稻氮素吸收总量、干物质积累量差异显著;不同品种间根系性状差异显著,抽穗期氮吸收效率高的品种其不定根干重及吸收面积较大;根系性状与干物质重、吸氮量和稻谷产量成正相关.氮素吸收效率高的品种在生育前期有较大的根于重与根表面积;而氮素利用效率高的品种表现为在生育中期与后期均有较高的根系活性,增加了生育后期的干物质及氮素的积累量与转运量,氮素籽粒生产效率较高.
Bibliography:44-1267/S
WANG Qiang, LI Wei, HE Fan, ZENG Jian-min, SUN Hao, WU Wei, LIAN Yun, WANG Kai （ 1. Crop Physiology and Production Center, Huazhong Agricultural University, Wuhan 430070, China; 2. Rice Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China ）
rice; variety; nitrogen use efficiency; root
Pot experiments were conducted with eight varieties of rice, including Liangyoupeijiu, Yangdao No.6, Zhenshan 97B, Xiangwan, Maoya, Simiao, Ceys and IR4 as materials under four nitrogen treatments. The differences of root traits at heading stage and physiology maturity stage were investigated, and the relationship between root characteristics and grain yield and nitrogen use efficiency were studied. Results showed that total nitrogen uptake and dry matter accumulation were significantly different among eight rice varieties at heading stage and physiology maturity stage. The root characteristics were significantly different among the varieties. The varieties with high total N-absorbed amount
ISSN:1004-874X