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2012~2013年在新疆高产春玉米区奇台和伊犁新源,以中单909为试材,每隔10d为1期,探究播期对高产(≥15 000kg/hm2)春玉米生长发育及产量的影响。结果表明,在4月8日~5月10日期间,早播利于高产。随着播期的推迟,玉米从拔节-吐丝天数、吐丝-成熟天数、全生育期(GDD)、收获穗数、穗粒数、千粒重、经济系数、干物质转运量(DMT)、干物质转运率(DMTE)、干物质转运对子粒的贡献率(CAVG)均呈下降趋势,导致产量降低。
From 2012 to 2013, Qizai and Yili new sources of high-yielding spring maize in Xinjiang were studied with Zhongdan 909 as test material, with a period of 10 days. The effects of sowing date on the growth and yield of high-yielding spring maize (≥15 000kg / hm2) Impact. The results showed that during the period of April 8 to May 10, the early sowing was beneficial to high yield. With the postponement of sowing date, the dry weight of corn increased from jointing-silking days, silking-maturing days, whole growth period (GDD), harvesting panicles, grains per spike, 1000-grain weight, economic coefficient, DMT DMTE, and CAVG of dry matter translocation all showed a decreasing trend, which led to the decrease of yield.