摘要
2001、2002年在群体水培条件下分别以88、122个国内外的籼稻代表品种为材料,测定植株的干物重、全氮含量、产量及其构成因素,采用组内最小平方和的动态聚类方法对供试品种成熟期的氮素累积量进行聚类,分析不同氮素累积量类型品种间产量及其构成因素的差异。结果表明:①供试品种成熟期氮素累积量差异很大,可聚类为A、B、C、D、E、F等6类,类型间的差异均达到显著水平;②氮素累积量为A、B、C、D、E、F类的品种,随着氮素累积量的增加,产量水平明显提高;③氮素累积量大的品种,表现为单位面积库容量大、每穗颖花数多、千粒重高、抽穗期叶面积系数大、生物产量高,穗数较多、单位叶面积籽粒产量较高,但其结实率和经济系数均较低。
88 and 122 conventional indica rice cuhivars were solution-cultured in 2001 and 2002, respectively. Dry matter weight, nitrogen content, yield and its components were measured. The tested rice cultivars were classified into 6 nitrogen accumulation types （i. e. A, B, C, D, E and F） based on their nitrogen accumulation at maturity by the MinSSw method, to analyze the differences of yield and its components. Results showed that： The average nitrogen accumulation of different types varied significantly, from 10.40 to 25.13 g·m^-2 in 2001 and from 8.53 to 33.31 g·m^-2 in 2002, respectively. The average yield of nitrogen accumulation type of A, B, C, D, E and F were significantly increased as nitrogen accumulation increased. Those cultivars with high nitrogen accumulation were characterized by the superiority in sink potential unit of area, spikelet number per panicle, 1000-grain weight, leaf area index at heading, biomass, panicle number per unit of area and grain yield per unit of leaf area, while seed setting rate and harvest index were lower.
出处
《扬州大学学报（农业与生命科学版）》
CAS
CSCD
北大核心
2006年第1期43-48,共6页
Journal of Yangzhou University：Agricultural and Life Science Edition
基金
国家自然科学基金资助项目(30270777)
