杂交水稻双本插高产原因研究  

Reasons for Obtaining High Yield by Double-plant Transplanting CuIture in Hybrid Rice

作　　者：赵正武[1] 张甲[1] 雷树凡 

机构地区：[1]四川省万县市农业科学研究所

出　　处：《杂交水稻》1996年第4期20-22,共3页Hybrid Rice

基　　金：四川省农牧厅栽培攻关项目

摘　　要：从分蘖消长、成穗率、穗长分布，茎秆粗细、穗粒结构等方面探讨了杂交水稻双本插增产原因。结果表明，双本插本田分蘖较少，分蘖成穗率达８２．２４％；穗长分布倾向大穗，群体穗型质量好，茎秆粗（倒２节）在０．４ｃｍ以上的数量占９１．６％，且茎租每增加０．１ｃｍ，每穗总粒数增加３０．１５粒，实粒数增加３３．２３粒，结实事８５．１８％。The yield increasing reasons of double-plant transplanting culture were studied and analyzedon the basis of the characters of growth and decline of tillers,panicle bearing tiller rate,distribution of pani-cle length,thickness of stem,structure of panicle and grain. The results showed that,compared with single- plant transplanting culture,the double- plant transplanting culture had fewer tillers and a shorter periodof ineffective tillering,with a high panicle bearing tiller rate(82.23%)and large panicles;it also had athicker stem (The percentage of stems with thickness more than 0.4 cm in terms of the second reciprocalnode was 91.6%,and with an increase of 0.1 cm in stem thickness,the spikelets and fiIled spikelets perpanicle will increase by 30.15 and 33.23,respectively);its seed setting rate was as high as 85.18%。

关 键 词：杂交水稻 双本插 穗长 茎粗 穗粒结构 高产 栽培 

分 类 号：S511.04[农业科学—作物学]