Six indica hybrid rice varieties were tested to study physiological characteristics of dry matter accumulation, distribution and transport, and population growth rate of indica hybrid rice varieties for breeding and cultivation of super-high yield hybrid rice varieties. The results showed that: 1)the leaf area index of six tested rice varieties was minimum at jointing stage and maximum at booting stage except Qyou 6,and the leaf area index of six tested rice varieties decreased after booting stage; 2) the dry matter accumulation of Qyoumahui 1 was maximum during the early growth period and the dry matter accumulation of six tested rice varieties except Xiangyou 109 reached maximum during the later growth period; 3) the dry matter distribution proportion in grains of six tested rice varieties was Qyou 6 (64. 64%)＞Zhongyou 608 (63. 55%)＞ⅡYou 838(62. 98%)＞Qmayouhui 1 (62. 85%)＞Xiangyou 109 (62. 56%)＞Tyou 300 (61. 54%), and the real yield of six tested rice varieties was ⅡYou 838＞ Qmayouhui l＞Zhongyou 608＞Xiangyou 109＞Tyou 300＞Qyou 6. The setting rate of ⅡYou 838 was significantly higher than the other five tested rice varieties, and the yield of ⅡYou 838 reached 12 353. 20 kg/km2 ,significantly higher than Xiangyou 109, Tyou 300 and Qyou 6, but not obviously higher than Qmayouhui 1 and Zhongyou 608.%为探讨不同籼型杂交水稻干物质积累、分配及产量形成特性,以实现水稻超高产栽培和培育超高产水稻新品种,试验以6个籼型杂交水稻品种为材料,对籼型杂交水稻干物质积累、分配、转运和群体生长率等生理特性进行研究.结果表明:1)拔节期叶面积指数最低,孕穗期除Q优6号外,其余各品种均达最高,随后各品种叶面积指数降低.2)生育前期Q优麻恢1号干物质积累最高,生育后期除湘优109外,其余各品种均达最高.3)6种籼稻在成熟期各器官的干物质分配比例均以籽粒的最大,依次分别为Q优6号(64.64％)＞中优608(63.55％)＞Ⅱ优838(62.98％)＞Q优麻恢1号(62.85％)＞湘优109(62.56％)＞T优300(61.54％),其实收产量大小顺序为Ⅱ优838＞Q优麻恢1号＞中优608＞湘优109＞T优300＞Q优6号；其中Ⅱ优838产量最高,为12 353.20 kg/km2,显著高于湘优109、T优300和Q优6号,但与Q优麻恢1号和中优608差异不显著.
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