【摘要】 通过设计不同品种和不同栽培措施试验形成不同产量小麦群体,分析小麦不同群体物质生产与产量及产量结构关系。结果表明,增加群体总生物产量、提高经济系数,可以提高经济产量。拔节前群体干物质积累量与穗数和成穗率呈显著或极显著正相关,拔节至开花期干物质积累与群体总结实粒数呈正相关,孕穗期干物质积累量的多少显著影响可孕花数的高低,开花后干物质积累量与产量呈极显著正相关,提出了小麦不同产量水平群体干物质积累量指标。更多还原

【Abstract】 The differences of dry matter accumulation and grain yield formation among different yields caused by different varieties and cultivation measures were studied from 1994 to 1999 in Yangzhou. Ears per hectare and earing percentage were significantly correlated with dry matter amount accumulated before elongation stage. The number of grains in population was positively corrected with dry matter accumulated from elongation stage to anthesis. The biomass at booting stage affected the number of fertile florets. Grain yield was very significantly correlated with dry matter accumulated after anthesis. The indices of dry matter accumulation at different growth stage for different grain yield were discussed.更多还原