Discrepancy and its physiological mechanism of the ability of population automatic regulation in different yield potential early hybrid rice varieties

• Published in: Jiangxi nongye daxue xuebao = Acta agriculturae universitatis jiangxiensis Vol. 34; no. 5
• Main Authors: Chen Xiaorong, Jiangxi Agricultural University, Nanchang (China), College of Agronomy, Key Laboratory of Crop Physiology, Ecology, Genetics and Breeding, Ministry of Education, Key Laboratory of Crop Physiology, Ecology and Genetic Breeding of Jiangxi Province, Sun Jia, Jiangxi Agricultural University, Nanchang (China), College of Agronomy, Key Laboratory of Crop Physiology, Ecology, Genetics and Breeding, Ministry of Education, Key Laboratory of Crop Physiology, Ecology and Genetic Breeding of Jiangxi Province, Xiao Zijing, Jiangxi Agricultural University, Nanchang (China), College of Agronomy, Key Laboratory of Crop Physiology, Ecology, Genetics and Breeding, Ministry of Education, Key Laboratory of Crop Physiology, Ecology and Genetic Breeding of Jiangxi Province
• Format: Journal Article
• Language: Chinese
• Published: 01.10.2012
• Subjects: ARROZ; FISIOLOGIA; HIBRIDOS; http://www.fao.org/aos/agrovoc#c_3707; http://www.fao.org/aos/agrovoc#c_49881; http://www.fao.org/aos/agrovoc#c_6493; http://www.fao.org/aos/agrovoc#c_6599; HYBRIDE; HYBRIDS; PHYSIOLOGIE; PHYSIOLOGY; REGLAMENTACIONES; REGLEMENTATION; REGULATIONS; RICE; RIZ
• ISSN: 1000-2286

对比分析2个杂交早稻不同产量潜力品种不同密度下的分蘖、叶面积、干物质积累、叶绿素、根系伤流及内源激素含量动态, 产量及其构成的差异性,结果表明:超级稻品种淦鑫203单位面积产量变异系数为7.73%, 极差率为19.70%,平均为7 745.95 kg/hm2, 对照品种淦鑫206单位面积产量变异系数为9.22%, 极差率为24.10%, 平均为7 469.90 kg/hm2, 表明淦鑫203群体自动调节力明显强于CK品种淦鑫206, 调节性能是每穗总粒数与单株有效穗数、结实率和千粒质量间协调互动平衡之结果; 淦鑫203低密度和高密度下的单株茎蘖数均值差距较淦鑫206大, 升降更平缓; 淦鑫203相同密度处理下的单位面积干物质积累能力强于淦鑫206, 随生育期的波动性大于后者;相同密度下各生育阶段叶面积指数均为淦鑫203高于淦鑫206, 除完熟期外, 各生育阶段淦鑫203叶面积指数的变异系数和极差率小于淦鑫206, 且其随生育进程的升降更为平缓; 相同密度处理下淦鑫203齐穗期倒二叶叶绿素含量高于淦鑫206, 完熟期则低于后者, 淦鑫203叶绿素起降幅度高于淦鑫206; 淦鑫203抽穗后根系伤流量低与高密度间的差距明显小于淦鑫206, 但随生育推进下降更为平缓; 相同密度下淦鑫203各生育阶段倒二叶ABA含量高于淦鑫206, 但不同密度下随生育进程而上升的幅度小于淦鑫206; 相同密度下淦鑫203倒二叶ZR含量随生育进程而下降的幅度小于淦鑫206, 淦鑫203高密度处理在不同密度下的倒二叶ZR含量最高, 但下降幅度也最大, 淦鑫206则为低密度下最高, 下降幅度最小; 总体上, 相同密度下各生育阶段淦鑫203倒二叶IAA和GA3含量高于淦鑫206, 但不同密度处理下波动性高于淦鑫206。 The yields and their components, dynamic of the tillers, leaf area, dry matter accumulation, chlorophyll, root bleeding, and endogenous hormones of the two different yield potential early hybrid rice varieties under different density were analyzed, and the results wer