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一九八○年,福州地区春收大小麦遭到了较强的低温袭击。从一月三十一日至二月十日,最低日温多数低于4℃,其中二月五至十日,最低日温为2.9～3.9℃,八日还下了小雪,主要由于遭受冷害,福州市这一年大小麦平均亩产只达116斤,比前一年减70斤。为寻求合理运用气候规律,防御小麦霜冻害、低温冷害的措施,本文试图利用自然低温来鉴定小麦冷害引起不育的敏感期和温度指标,进而探讨防御冷害的对策。一、小麦冷害的症状用不实率来表示冷害的程度,不实率为穗中每个小穗两边空壳小花占小穗两边总小
In 1980, the spring harvest wheat in Fuzhou was hit hard by the cold. From January 31 to February 10, the lowest day temperature was mostly below 4 ℃. Among them, the lowest day temperature was 2.9 to 3.9 ℃ from February 5 to February 10, with snow also falling on the 8th due to chilling injury This year, the average annual output of wheat in Fuzhou reached only 116 kg per mu, down 70 kg from the previous year. In order to seek the measures of applying the climatic rule reasonably and preventing wheat frost damage and chilling damage, this paper attempts to identify the sensitive period and temperature index of infertility caused by chilling injury of wheat by using natural low temperature, and then discuss the countermeasures to prevent chilling damage. First, the symptoms of cold chilling injury with cold rate to represent the extent of chilling damage, not real rate for each spikelet on both sides of the shell flowers on both sides of spikelets on both sides of the total small