不同产量类型籼稻品种库容量构成特点的研究

2001～2002年，在群体水培条件下，以国内外20世纪30～90年代育成的88个籼稻代表品种(品系)为供试材料．采用组内最小平方和的动态聚类方法对产量进行聚类分析，研究不同产量类型籼稻品种库容量及其构成的基本特点。结果表明：高产品种的单位面积库容量显著高于中、低产品种，同时抽穗期的叶面积系数、干物质累积量和氮素累积量等指标．也显著高于中、低产品种；高产品种抽穗期的单位叶面积库容量、单位干物质库容量和单位氮素库容量等库容形成效率指标显著高于中、低产品种；抽穗期植株含氮率的变化趋势与抽穗期单位叶面积、单位干物质、单位氮素所形成的库容量的变化趋势一致。

Study on the Characteristics of Sink Potential Formation in Different Yield Types of Conventional Indica Rice Varieties

88 conventional indica rice varieties which were clustered into 3 yield types according to grain yield per area with the MinSS_w method were hydroponically cultured in 2001 and 2002 to investigate the characteristics of sink potential formation among different yield types. Results showed as follows: Sink potential per area, LAI at heading, dry matter and nitrogen accumulation at heading of high yield type varieties were significantly higher than that of middle or low yield type varieties, sink potential per leaf area, per dry matter and per nitrogen of high yield type varieties were also higher than that of middle or low yield type varieties; The change of nitrogen content at heading of different yield types was similar to that of sink potential per leaf, per dry matter and per nitrogen.