【摘要】 旱地秋覆膜玉米子粒灌浆特性主要表现在LAI增加,生物产量提高。花后5～10d为子粒形成阶段,35～40d为灌浆强度骤增阶段,45～55d为子粒失水成熟阶段。秋覆膜玉米表现出较高的转换率和较大的移动量,粒/叶(cm2)比值高。在“源─库”器官同化物合成与转运中,各器官转换率大小为秋覆膜玉米茎>叶>穗轴>苞叶>鞘,露地玉米为茎>叶>苞叶>穗轴>鞘。叶是合成同化产物的主要源器官,茎鞘具有多次转移功能,苞叶和穗轴表现出一次中转特性。更多还原

【Abstract】 It is mainly shown on the increase of LAI and improvement of biomass,dry-land autumn plastic covering maize filling characteristic.They are seed forming stage,filling stage and water losing stage in turn during5to10days,35to40days,and45to55days after flowering.The maize shows high transfer rate and large moving quantity.The seed quantity /leaf area ratio is high.During the“source—storeroom”composing and transfer of organ assimilation matter,on the autumn plastic covering maize,the transfer rate of different organs in turn is:stem>leaf>ear axis>bract>scabbard.On the no mulch maize,it is:stem>leaf>bract>ear axis>scabbard.Leaf is the main source organ of assimilation matter.Stem and scabbard have the function of transfer time after time.Bract and ear axis have the characteristic of transfer only once.更多还原