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对汕优63、献优63、IR661、扬稻4号。苏协粳1号。盐粳2号等6个品种不同生育期的干物质产量，叶面积系数，比叶面积。产量等研究表明：（1）不同类型水稻品种严量存在差异，杂交稻最高、常规籼稻次之、常规粳稻最低，生物产量是造成产量差异的主要原因；（2）干物质生产速度呈单峰有顶曲线，孕穗期出现最大值，品种间趋势一致，但不同类型水稻品种间，干物质生产速度差异较大，杂交稻最大、常规籼稻次之、常规粳稻最小；（3）不同类型水稻品种叶面积系数与干物质生产速度呈线性正相关，相关系数均达显著或极显著水平，并就不同类型水稻品种的栽培策略进行了探讨。
Shanyou 63, Xiangyou 63, IR661, Yangdao 4. Soviet Union on the 1st japonica. Yanjing 2 and other 6 varieties at different growth stages of dry matter production, leaf area coefficient, specific leaf area. Yield and other studies have shown that: (1) There are significant differences in the types of rice varieties of different types, the highest hybrid rice, conventional indica followed, the lowest conventional japonica rice, biological yield is the main reason for yield differences; (2) dry matter production rate was single peak Top curve and maximum at booting stage, but the trends among different varieties were the same. However, there was significant difference in the production rate of dry matter between different types of rice varieties, the hybrid rice was the largest, followed by conventional indica rice and conventional japonica rice. (3) There was a linear positive correlation between leaf area coefficient and dry matter production rate, and the correlation coefficient reached significant or extremely significant level. The cultivation strategies of different types of rice varieties were also discussed.