【摘要】 进行积温对春玉米叶面积、生物量和产量影响试验,结果表明:积温与叶面积指数、生物量和产量之间存在密切的线性关系,积温每增加100℃.d,最大叶面积指数增加0.4,物量增加162 g/hm2,单产增加591 kg/hm2;积温每增加10%,玉米叶面积增加8%,最大生物量增加12.5%;气温升高1℃,玉米生物量增加243 g/m2,产量增加9.8%左右。反之,活动积温减少100℃.d左右,玉米单产减少8%～10%,将发生低温冷害。正常年份,当地适宜种中晚熟品种和正常偏晚播种。在水分条件比较适宜的条件下,气候变暖对提高玉米产量有利。更多还原

【Abstract】 Effect of accumulated temperature on maize LAI,biomass and yield was study.The relation between LAI,biomass and yield of maize and accumulated temperature was closer.If cumulative temperature increased by 100 ℃·d,the maximal LAI of maize would increase by about 0.4,the biomass would increase by about 162 g/m2,and the yield would increase by about 591 kg/hm2.If cumulative temperature increased by 10%,the LAI would increase by about 8%,biomass would increase by about 12.5%.If temperature risd 1 ℃,the biomass would increase by about 243 g/m2,yield would increase by about 9.8%.On the contrary,the accumulated temperature decreased by 100 ℃·d about in maize growing stage,the yield would decrease by about 8%～10%,then maize chilling injury would occur.In normal age,medium-late varieties of maize and little late sowing was suitable in the locality.Under suitable moisture,the climate warming is beneficial for increasing maize yield in Northeast China.更多还原