超高产组合新优752干物质积累与分配特性研究

“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。

Study on Dry Matter Accumulation and Distribution Properties of Superhigh-yield Combination-Xinyou 752

Xinyou 752, a hybrid rice combination with good quality and superhigh yield, is be spread on a large scale. In this experiment, the dry matter accumulation and distribution properties of Xinyou 752 and Shanyou 63 were studied. By contrast with the latter, the former has the following advantages: 1. Bigger leaf area index (LAI) as well as higher photosynthetic productivity and dry matter yield.2. Higher output percentage and transfering percentage of dry matter after heading. 3. More flowers per area unit, 1000-grain weight and storage capacity.And the factors above can act as the sufficient conditions and material basis for Xinyou 752 to have a significant yield increase over Shanyou 63.