“新优７５２”是一个优质超高产杂交水稻组合，目前正在大面积推广。本试验对该组合进行了干物质积累与分配特性测定研究，结果表明：“新优７５２”与“汕优６３”相比，叶面积系数，净光合生产率均较大，干物质生产量多；抽穗后干物质的输出率及运转率高；单位面积颖花数多，千粒重大，库容量大。这些因素为“新优７５２”比“汕优６３”显著增产创造了充分的条件和物质基础。 “New gifted 752” is a high-yielding hybrid rice combination of high quality, is currently being widely promoted. The results showed that: “Xinyou 752” had higher leaf area coefficient and net photosynthetic rate and higher dry matter production than “Shanyou 63”; After heading, the output rate and operation rate of dry matter are high; the number of spikelets per unit area is large, the grain size is large, and the storage capacity is large. These factors created sufficient conditions and material basis for “Xinyou 752” to significantly increase output of “Shanyou 63”.