双季超级稻的干物质生产特性研究

Studies on the Characteristics of Dry Matter Production in Double Cropping Early and Late Super Rice

以10个超级早、晚稻品种为材料,研究了双季超级稻的干物质生产特性。结果表明,超级早、晚稻均具有明显的干物质生产优势,稻谷产量随生物产量的增加而提高,与抽穗后的干物质积累量呈显著或极显著正相关,而与抽穗前各阶段的干物质积累量相关不显著,与抽穗后的LAI也呈极显著正相关。早发度与成穗率和产量密切相关,可作为水稻由营养生长向生殖生长过渡期的群体质量指标。

Using ten early and late super rice varieties as the materials, the dry matter production characteristics of double cropping super rice were studied in field conditions. The results showed that early and late super rice had obvious superiority in dry matter production and accumulation, and the grain yield increased with the biomass. There was a significant or very significant positive correlation between the grain yield and the dry matter accumulation after heading, but there was not a correlation between the grain yield and the dry matter accumulation before heading. There was also a very significant positive correlation between the grain yield and the LAI after heading. The ratio of shoot dry weight to leaf area index in the first branch differentiation stage was closely related to the earbearing tiller rate and grain yield, so it can be used as a population quality indicator during the transition period from vegetative growth to reproductive growth.