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我省地处东南沿海,属中亚热带,气候温和,雨量充沛,无霜期长,大于或等于10℃的生长期达228~264天,同期间的积温达4832.6~5687.4℃,适合双季连作稻的生长.自1957年大面积改制以来,已初步形成了麦(油,肥)-稻-稻的耕作制度,促进了粮食生产的发展.但是,由于季风的影响,在冬夏季风进退转变时,春秋两季常有冷害发生.在早稻生长期间的低温冷害,常造成烂芽、烂秧、死苗、发僵,个别年份5~6月的低温还可以造成早稻早、中热品种的颖花退化和不孕.连作晚稻的冷害,主要是抽穗开花期的低温,影响开花结实,造成翘稻头,以致严重减产.现仅就可造成连作晚稻发生冷害的秋季低温作如下分析.
The province is located in the southeastern coast of the province, is a sub-tropical, mild climate, abundant rainfall, frost-free period, greater than or equal to 10 ℃ of the growing period of 228 to 264 days, during the same period of up to 4832.6 ~ 5687.4 ℃ accumulated temperature, Growth Since the large-scale restructuring in 1957, wheat (oil, fertilizer) - rice - rice farming system has been initially formed and promoted the development of food production.But due to the monsoon, when the winter monsoon changed back and forth, Chilling injury often occurs in two seasons. Low temperature chilling injury during the growth of early rice often results in rotten buds, rotten seedlings, dead seedlings and stiff hair. The low temperature in May-June of individual years can also cause the spikelets of early and middle-aged varieties to degenerate And infertility.Cold damage of continuous cropping late rice is mainly the low temperature at flowering and flowering stage, which affects the flowering and fruiting, resulting in serious headache, resulting in serious production loss.