甜高粱开花后干物质积累与分布的研究

甜高粱从开花期到成熟期间,穗部干物质积累总量的80％－85％的物质来自植株在此时期绿叶面积的光合作用。在同样的栽培条件下,甜高粱干物质积累量随穗部籽粒成熟状态而逐渐增加。其历程是,开花期低于乳熟期,乳熟期低于成熟期。单株干物质积累与分布呈S形曲线,穗部高于上茎,上茎低于中茎,中茎高于下茎。

A STUDY ON THE ACCUMULATION AND DISTRIBUTION OF DRY MATTER IN POST-FLOWERED SWEET SORGHUM

For sweet sorghum, from flowering to ripening period the 80% - 85% of the drymatter accumulation in the ear comes from the result of the photosynthesis of the samecultivating condition, the dry matter accumulation increase with the maturity of thegrains from flowering stage,milk stage to maturity stage.The process of dry matter accumulation and distribution for a single plant resembles a "S" and there are more drymatter in the ear than that in the upper stem and lower stem.