广西超级杂交早稻单产11．62t／hm^2穗粒结构特点研究  

Characteristics of panicle-grain structure matched with the yield of 11.62t/hm^2 in early super hybrid rice of Guangxi

作　　者：李维科[1] 潘英华[1] 李振经[1] 于平福[2] 

机构地区：[1]广西农业科学院水稻研究所,南宁530007 [2]广西农业科学院科技情报研究所,南宁530007

出　　处：《广西农业科学》2009年第1期19-22,共4页Guangxi Agricultural Sciences

基　　金：广西区科技厅科学基金项目(0832016)

摘　　要：对超级杂交稻在田间的穗粒结构定点跟踪调查分析表明,不同密度来源的有效穗对产量的贡献大小有明显差异,各种来源有效穗对产量的贡献率大小顺序为:一次分蘖穗>二次分蘖穗>主穗>三次分蘖穗,其中一次分蘖穗的贡献最为突出,达55%以上;产量达到11.62t/hm2的穗粒结构指标为:每公顷抛栽25.68万穴,每穴有效穗13.9穗,每公顷有效穗356万,每穴粒重45.6g,主穗平均实粒数171.5粒/穗,一次分蘖穗平均实粒数130.5粒/穗,二次分蘖穗平均实粒数88粒/穗;全田平均每穗实粒数130粒,平均每穗粒重3.63g。The characteristics of panicle-grain structure in the demonstration field of super hybrid rice were investigated and analyzed, the results showed that there was obvious difference among effective panicles from different planting densities in terms of contribution to the yield. The order of the contribution rate of the panicles from different sources was： the panicles from primary tillers 〉 the panicles from secondary tillers 〉 the main panicle 〉 the third tillers. The contribution rate of the panicles from primary tillers was above 55%. The indexes of the panicle-grain structure matched with a yield of I 1.62t/hm2 was as follows： a planting density of 256,800 hills per hectare, 13.9 effective panicles per hill, 3.56 million effective panicles per hectare, 45.6 g of grain weight per hill, 171.5 grains per main panicle, 130.5 filled grains per panicle from primary tiller, 88 grains per panicle from secondary tiller, and an average of 130 grains per panicle and 3.63 g of grains weight per panicle.

关 键 词：超级杂交水稻 穗粒结构 栽培技术 

分 类 号：S511.01[农业科学—作物学]