不同类型饲用玉米品种干物质的积累与运转规律研究

通过对两种类型饲用玉米品种干物质积累与运转规律的研究分析,结果表明:青贮型玉米科多8号偏重于营养生长,生物产量较高,拔节之前其生长中心为叶片,拔节之后其生长中心为茎秆,干物质积累量吐丝前大于吐丝后,比例为67∶33,形成生物学产量的关键时期在大口期至吐丝期,光合产物向子粒转移输出的主要器官是叶片;粮饲兼用型玉米陕单310偏重于生殖生长,拔节之前其生长中心为叶片,拔节至吐丝25d生长中心为茎秆,吐丝25d至成熟期生长中心为子粒,形成生物学产量和子粒产量的关键时期在灌浆期,光合产物向子粒转移的主要器官是叶片、茎秆和苞叶。

Laws of Dry Matter Accumulation and Transfer in Different Types of Silage Maize

Through research and analysis about laws of dry matter accumulation and transfer in two types of silage maize,the results showed: As to silage maize,it laid particular stress on nutrition growth with higher biological yield.While its growth focus was leaf before jointing,the focus became stalk after that.Amounts of dry matter accumulation before spinning were more than that of after spinning and ratio between them was 67:33.The key period of forming biological yield was from big bell-mouthed stage to spinning stage and the main organ transferring photosynthate to grains was leaf.As to maize of foodstuff and silage type,it laid particular stress on procreation growth.While its growth focus was leaf before jointing,the focus became stalk from jointing to 25 days after spinning and further became grain from 25 days after spinning to ripeness stage.The key period of forming biological and grain yield was grouting stage and the main organs transferring photosynthate to grains were leaf,stalk and bract.