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本年度北京地区冬小麦生育期间农业气象条件有利有弊。冬暖,春季气温回升稳定,持续偏高,使小麦抽穗期比常年提前,且穗数也较多。但由于秋冷和3年连旱,影响苗齐,苗壮。灌浆期高温干旱使大部分麦田灌浆期缩短千粒重较常年低。一、出苗～停止生长:(9月下旬～11月下旬)秋冷秋旱致使冬前苗情为近几年最差的一年。但秋季降温平稳,又有利于冬前锻炼。从1979年至1981年7～9月份平均降水量仅为310毫米,相当于历年同期降水量的6成。可谓之历史上罕见的3年连旱,小麦播种时墒情不足,出苗不全。据1981年10月中旬各县区查苗
The agricultural meteorological conditions during the growth of winter wheat in Beijing this year have both advantages and disadvantages. Winter warm, spring temperatures rose stable, continuing high, so that the heading stage of wheat ahead of the perennial, and more spikes. However, due to autumn cold and even drought in 3 years, affecting seedlings Qi, Miao Zhuang. The high temperature and drought during the filling stage shortened the grain weight of most grain-filling stages by 1000 grain weight compared with that of normal years. First, the emergence of ~ to stop growing: (late September to late November) autumn and fall autumn drought caused the seedlings for the worst years in recent years. However, a steady fall in autumn, but also conducive to winter training. From 1979 to 1981, the average precipitation from July to September was only 310 mm, equivalent to 60% of the precipitation over the same period of previous years. Can be described as the history of rare 3 consecutive drought, lack of moisture when planting wheat, sprouting incomplete. According to mid-October 1981 check County seedlings