1977～1979年,作者在杂交稻高产栽培过程中,研究了高产群体的干物质生产与分配。高产田谷粒产量与干物质产量密切相关。水稻生长前期总光合势的迅速增加,导致干物质生产与积累表现优势,净同化率的优势前期明显,后期消失。适期早栽、冠层结构良好,干物质产量较高。改善栽培条件,有利提高经济系数。增加单蘖的干物质和单位叶面积的干重,有利于建成高产群体。杂交稻高产栽培关键在于合理利用营养优势,提高光能利用率、协调器官之间和生育期间的生长。最高茎蘖数不超过35万/亩,最高叶面积指数保持在7.5～8左右为好。 From 1977 to 1979, the authors studied the production and distribution of dry matter in high-yielding populations during the high-yielding cultivation of hybrid rice. High yield grain yield and dry matter yield are closely related. The rapid increase of total photosynthetic potential during the early growth stage of rice led to the superiority of dry matter production and accumulation. The advantage of net assimilation rate was obvious in the early stage and disappeared in the later stage. Early planting early, canopy structure is good, higher dry matter production. Improve the cultivation conditions, favorable to improve the economic coefficient. Increasing the dry weight of single tiller and the dry weight of leaf area per unit is conducive to the construction of high yield population. The key to high-yielding hybrid rice lies in the rational use of nutritional advantages, improve the utilization of light energy, coordination between organs and growth during growth. The maximum number of stems and tillers not more than 350,000 / mu, the highest leaf area index remained at around 7.5 to 8 as well.