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研究了麦优４号等杂种小麦品种（组合）不同密度和不同施氮量处理的干物质积累特性。结果表明杂种小麦生育前期和花后有明显的光合优势，光合产物积累量高，成熟期茎鞘干物重占总干重的比例高；杂种小麦花前光合产物输出量和输出率特别是茎鞘干物质输出率低于常规小麦；降低群体密度和增加施氮量能增加杂种小麦干物质积累量，提高光合产物向籽粒的输送效率
The dry matter accumulation characteristics of hybrid rice variety “Mayou 4” with different densities and nitrogen rates were studied. The results showed that hybrid wheat had obvious photosynthetic advantages in early growth and after anthesis, high accumulation of photosynthetic products and high dry matter weight in stem and sheath at mature stage. The output and output of pre-anthesis photosynthetic products of hybrid wheat, especially stem and sheath Dry matter output rate was lower than conventional wheat; to reduce the population density and increase the amount of nitrogen application can increase the dry matter accumulation of hybrid wheat and improve the delivery efficiency of photosynthate to grain