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今年是自1949年以来小麦冻害減产的第5个年份,全市总产和单产均比1979年減产3成以上。不利的天气气候条件是造成減产的主要原因之一。今年在冬小麦生育期间虽然后期降水均匀,光照较好,对增加粒重有利,而且沒有大风雨带来的大面积倒伏。但是去年秋冬连续干旱及11月份的突然降温,使小麦抗寒能力降低。早春3—4月份的低溫光照不足又使小麦抽穗期延迟,灌浆期缩短,这些都对小麦产量带来很不利的影响。因此,总的来看,今年在小麦生育期间气象条件是弊大于利。
This year marks the fifth year since the wheat frost cut was made in 1949. The total output and yield of the whole city have been cut by more than 30% over 1979. Adverse weather conditions are one of the major causes of the decline. This year during the winter wheat growth although the latter part of precipitation, light better, to increase the weight of the grain, and no large-scale lodging brought by the wind and rain. However, successive autumn and winter last autumn and sudden cooling in November reduced the cold tolerance of wheat. Lack of low-temperature light in March-April in early spring delayed the heading stage of wheat and shortened the filling period, which all had a negative impact on wheat yield. Therefore, on the whole, the meteorological conditions during the wheat growth this year outweigh the benefits.