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我省双季连作晚稻在抽穗开花期常常遇到秋季南侵的冷空气袭击,以致晚稻不能正常开花,造成大量不实,有的甚至绝收,严重影响我省水稻的高产、稳产和双季稻面积的扩大。这种情况在中、高海拔地区尤为严重。群众习惯把它称之为“秋寒”或“寒露风”。为了探讨它对晚稻开花、结实的危害规律,鉴定开花、结实的寒害温度指标,以提供防御措施的依据,我们在田间自然气候条件下采用分期播种、移栽试验的方法的同时,在冷库中对正在抽穗开花的不同品种晚稻进行不同低温处理试验。
Two-season continuous cropping of late rice in our province often encounters the cold air attack during the autumn and southward invasion at the flowering and flowering stage. As a result, the late rice can not flowering normally, resulting in a large amount of false information. Some of them are even unmanaged, seriously affecting the yield, The expansion. This situation is particularly serious in middle and high altitude areas. The masses used to call it “autumn cold” or “cold dew wind”. In order to discuss its harmful effects on the flowering and fruiting of late rice, and to identify the temperature and temperature indicators of flowering and fruiting, and to provide the basis for defensive measures, we used the method of staged seeding and transplanting in the natural weather conditions of the field, Different varieties of heading rice is heading for flowering at different low temperature treatments.