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小麦粒重年际间变幅相当大。如“23654”千粒重变化在32—47克之间。相差15克之多。稳定和提高粒重,对实现小麦稳产高产具有重要意义。为此,我们在1979年至1981年对23654、5022两个小麦品种分别做了灌浆速度的测定。三年的测定结果使我们初步认识了一些小麦籽粒灌浆的基本规律,并初步探索到几条提高粒重的措施。一、气象条件对小麦灌浆及粒重的影响1、气象条件与灌浆期长短:小麦开花后气温较低的年份,灌浆时间长,千粒重高,反之则低。根据我所三年测定,一般是日平均气温超过25℃,相对湿度低于60%,茎杆含水率低于50%,籽粒含水率低于30%,灌浆速度出现负值,小麦停止灌浆。
Wheat grain amplitude is quite large interannual. Such as “23654 ” 1000 grain weight change between 32-47 grams. A difference of 15 grams. Stabilizing and improving grain weight are of great significance to achieve stable and high yield of wheat. To this end, we measured the filling rate of 23654 and 5022 wheat varieties from 1979 to 1981 respectively. Three years of measurement results allow us to initially understand some of the basic rules of wheat grain filling and preliminary explore several measures to increase grain weight. First, the meteorological conditions of wheat grain filling and grain weight impact 1, meteorological conditions and filling period length: the temperature of wheat after blooming in the lower, filling a long time, one thousand high, otherwise low. According to my three years of determination, the average daily temperature is generally above 25 ℃, relative humidity below 60%, stem moisture content below 50%, grain moisture content below 30%, grain filling rate negative, wheat stop grouting.