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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。
The grain filling characteristics of maize mulched in dry land in autumn were mainly increased with LAI and increased with biomass. From the 5th to 10th day after flowering, the stage of grain formation was formed, the stage of grain filling intensity increased sharply from 35 to 40 days, and the stage of dehydration of grain was from 45 to 55 days. Autumn-covered maize showed higher conversion rate and larger amount of movement, with a higher ratio of grain to leaf (cm2). In the “source-treasury” organ assimilation synthesis and translocation, the conversion rate of each organ was in autumn-covered maize stem> leaf> corn cob> husk leaf> sheath and open field corn stem> leaf> husk leaf> cob> sheath . The leaves are the main source organs for the synthesis of assimilation products. The stems and sheaths have multiple transfer functions, while the husk leaves and cob shoots show a transit characteristic.