黑龙港流域气象生态因子对夏玉米粒重的影响

连续９年定点试验研究表明，在黑龙港流域生态多下，灌浆时间长短对夏玉米粒重的作用大于灌浆速度；灌浆期间平均气温低、气温日较差大、降雨总量在２００ｍｍ左右，有利于延长灌浆时间，从而有利于提高夏玉米粒重，其中主要因子是平均气温。研究认为，在此区域热量资源能满足夏播中熟玉米灌浆期间光合作用脏持积累的生理要求。

The Effect of Ecoclimatical Factors on Grain Weight of Summer sowing Maize in Heilonggang River Valley

Studies of 9 year fixed site experiments show that under the ecoclimatical conditions of Heilonggang River valley, the effect of filling period on grain weight of summer maize is greater than the filling velocity, the suitable conditions for extending filling period are lower mean temperature, higher diurnal range of temperature, and about 200mm amount of precipitation. Among these factors, the mean temperature is more significant. It was considered that the quantity of heat of this valley is sufficient for summer sowing mid season hybrid strain.