【摘要】 通过对75个品种两年542个小区的多点试验,研究了攀西地区优质稻产量构成因素的变异及其构成特点,结果表明:在水稻的产量构成因素中以穗数和穗粒数变异最大,千粒重变异最小,其中籼稻以穗粒数变异最大,粳稻则以穗数变异最大,籼稻结实率的变异大于粳稻。水稻产量与其构成因素之间的关系以及高产栽培的主攻目标因品种类型和产量水平而异,杂交籼稻应以攻大穗为主,粳稻应以攻穗数为主,常规籼稻在低水平下以攻穗数为主,在高产水平下以攻大穗为主。更多还原

【Abstract】 With 75 varieties and 542 experiment plots in different location in Panxi region,the variation of yield components of high-quality rice were studied.The results were as follows:Among all yield components,the variation of number of grains per panicle of Indica rice is the largest,while the variation of number of panicles of Japonica rice is the largest.The variation of grain weight of both Indica and Japonica rice is the lowest.The variation of filled grain percentage of Indica is larger than that of Japonica.The relationship between yield and its components and main target of high yielding varied with variety type and yield level.The main target of high yielding of hybrid Indica variety should be more grains per panicle,while that of Japonica variety should be more panicles.更多还原