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不同类型小麦干物质积累动态呈“S”型曲线。中粒型品种干物质积累量低于小粒型和大粒型品种。中粒型和大粒型品种叶片干物质积累峰值在抽穗期 ,茎鞘干物质积累峰值在灌浆期 ;小粒型品种叶和茎鞘的干物质积累峰值均出现在灌浆期。不同类型品种叶片干物质的转运率和移动率表现为 :大粒型 >小粒型 >中粒型 ;茎鞘物质转运率和移动率表现为 :中粒型 >大粒型 >小粒型 ;子粒重量来源于开花前养分积累的比例表现为 :大粒型 >中粒型>小粒型。大粒型品种在干物质积累和转运方面有明显的优势。小粒型品种限制产量的主要因素是茎鞘物质输出量较少 ,大量光合产物滞留在茎鞘中。灌浆至成熟期的CGR与产量的相关达显著水平。
The dynamic changes of dry matter accumulation of different types of wheat showed “S” curve. Medium grain varieties had lower dry matter accumulation than small grains and large grains. The peak value of dry matter accumulation in leaves of mid-grain type and large grain-type cultivars was at the heading stage and the dry matter accumulation peak of stem-sheath was at the filling stage. The dry matter accumulation peak of the leaves and stem-sheaths of the small grain-type cultivars all appeared in the filling stage. The leaf dry matter translocation rate and translocation rate of different types of cultivars were as follows: large grain type> small grain type> medium grain type; the translocation rate and mobility of stems and sheaths were as follows: medium grain size> large grain size> small grain size; The percentage of nutrient accumulation before flowering is as follows: large grain type> medium grain type> small grain type. Large grain varieties have obvious advantages in dry matter accumulation and translocation. The main factor restricting the yield of small-sized varieties is that the output of stem-sheath materials is small, and a large amount of photosynthetic products remain in the stem-sheath. The correlation between grain-filling and maturity CGR and yield reached a significant level.