杂交水稻新组合特优649高产穗粒结构特点研究  

Study on characteristics of panicle and grain structure matched with high-yield for new hybrid rice combination "Teyou 649"

作　　者：李维科[1] 韦善富[1] 黄英美[1] 

机构地区：[1]广西农科院水稻研究所,南宁530007

出　　处：《广西农业科学》2006年第2期120-122,共3页Guangxi Agricultural Sciences

基　　金：广西科技攻关项目(02280029;05370071)

摘　　要：试验采用裂区设计，以肥料为主区，密度为副区。研究了杂交稻新组合特优649单产9t／hm^2以上穗粒结构的特点。结果表明，不同施肥、不同密度来源（即不同位次分蘖形成）的有效穗对产量的贡献大小有明显差异，贡献率表现为：低位一次分蘖穗〉二次分蘖穗〉主穗。其中低位一次分蘖穗的贡献最为突出，在62％～73％之间，二次分蘖穗占20％，主穗占15％左右。此外，随施肥和密度的增加，主穗对产量的贡献随之增大。The experiment utilized the split-plot design with fertilizers as main plots and plant density as subplots, to study the characteristics of panicle and grain structure matched with a yield of more than 9t/hm^2 for the new hybrid rice combination ＂Teyou 649＂. The results showed that there was obvious difference between productive panicles derived from different nodes in terms of contribution to the yield. The contribution rate of the panicles from different nodes derived tillers was like this; the panicles from lower node tillers 〉 the panicles from secondary tillers 〉 the main panicle. The percentage of the panicles from lower node tillers was the most with 62%- 73%, that of secondary tillers was 20% and the main panicle was 15%. Moreover, with fertilizer and planting density increasing, the contribution of the main panicle to the yield was increasing.

关 键 词：杂交水稻 特优649 穗粒结构特点 特征特性 

分 类 号：S511.01[农业科学—作物学]