论文部分内容阅读
1988～1989年在河南省夏玉米不同生态类型区的9个试点上,利用豫玉2号和豫玉5号两个杂交种,开展了夏玉米亩产650～700kg 的群体生态生理指标研究。结果表明:豫玉2号、豫玉5号从播种至成熟需积温2568±108℃。亩产达到650～700kg 时,全生育期耗水320M~3左右,需日照时数603±49h,最大叶面积指数为4.92～5.20,光合势总量为174981～176338m~2·d,成熟时生物产量应达到1383～1492kg/亩,经济系数为0.44～0.48,全生育期平均光合生产率为8.1～9.1g/m~2·d。本文还对该产量水平条件下两个玉米杂交种不同生育阶段的生态生理指标作了定量描述。
From 1988 to 1989, 9 ecotypes of summer maize from different ecotypes in Henan Province were used to study the population ecophysiological parameters of 650-700 kg per mu of summer maize by using two hybrids, Yuyu 2 and Yuyu 5. The results showed that Yuyu 2 and Yuyu 5 accumulated temperature from 2568 ± 108 ℃ from sowing to maturity. When the yield per mu reaches 650-700kg, the water consumption during the whole growing period is about 320M ~ 3, the sunshine duration is 603 ± 49h, the maximum leaf area index is 4.92 ~ 5.20 and the total photosynthetic potential is 174981 ~ 176338m ~ 2 · d. The biological yield should reach 1383 ~ 1492kg / mu, the economic coefficient is 0.44 ~ 0.48, and the average photosynthetic productivity in the whole growth period is 8.1 ~ 9.1g / m ~ 2 · d. The ecophysiological indexes of two maize hybrids at different growth stages under this yield level were also described quantitatively.