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在无产阶级文化大革命的推动下,几年来,我省广大山区进行水稻单季改双季的耕作制度大改革,促进了粮食的持续增产,涌现出一批粮食亩产跨《纲要》、超千斤的县、社、队。但由于气候反常,经验不够,历年常发生几十万亩到一百多万亩双季稻冷害。一九七六年春寒、秋寒并发,加上“四人帮”的干扰破坏,全省早稻烂秧损失稻种达六千七百多万斤,晚稻不抽穗或抽穗不勾头一百五十多万亩,损失很大。从几年来冷害的情况看:春季气候最不稳定,平均二年就有一年出现严重倒春寒,发生大面积烂秧死苗;但水稻以孕穗期和开花期对低温最敏感,早稻孕穗期如遇上梅雨季节阴寒,晚稻齐穗开花期如遇上寒流,日平均气温降到20℃连续三日以上,即严重危害花粉发育
Under the impetus of the Great Proletarian Cultural Revolution, over the past few years, the vast mountainous areas in our province have carried out major reforms in the farming system of single season and double seasons in rice so as to promote a steady increase in grain output. County, community, team. However, due to the anomalous climate and lack of experience, hundreds of thousands of mu of perennial rice crops often experience chilling damage to more than one million mu of double crop rice. In the spring of 1976, the autumn cold combined with the “gang of four” interference and destruction, the province’s early rice rotten seedlings lost more than 6700000 kilograms of rice, late rice is not heading or heading is not hooked one hundred and five More than 100,000 mu, a great loss. According to the situation of cold damage in recent years, the spring climate is the most unstable with a severe reverse spring cold one year on average in two years. Large-area rotten seedlings die in large quantities. However, rice is most sensitive to low temperature at booting and flowering stages, Cold rainy season on the plum blossom, late rice Qi flowering in case of cold flow, the average daily temperature dropped to 20 ℃ for more than three days, that is seriously endangering pollen development