高产优质水稻品种新稻22产量结构分析及高产栽培技术

摘要

对水稻品种新稻22产量构成因素的分析表明，4个产量构成因素对产量贡献的大小依次为结实率、每穗总粒数、有效穗、千粒重。产量9．0 t/hm2以上的合理穗粒结构为：有效穗数347．5万/hm2，每穗总粒数132．5粒，结实率90％，千粒重25 g左右。%Yield components of high-yielding hybrid rice Xindao 22 were researched and the results indicated that seed rates, grain number per panicle, effective panicles and 1000-grain weight contributed to yield. Appropriate spike-grain structure to get yield over 9.0 t/hm2 which effective panicles were 3.475 millon/hm2, grain number per panicle were 132.5, seed rates was 90%and 1000-grain weight was 25 g.