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从调查得知,寒露风是桂平县晚稻生产的主要灾害性天气。随着迟熟高产品种“包选二号”种植面积的扩大,历年晚稻丰、欠年产量波动很明显。如1971年总产比1970年增五千万斤,但1976年总产比1975年减七千多万斤,1970、1978年减产幅度也较大。沙坡公社种“包选二号”占总面积80%,1978年10月中旬遇寒露风天气,其中新安12队有36亩,平均亩产仅25斤,类似情况不少,都与寒露风有关。可见,摸清寒露风危害规律,为晚稻品种选育方向、搭配和合理布局,掌握生产季节,充分合理利用农业气候资源,保证晚稻稳产高产提供气候依据,是十分必要的。
From the investigation, cold dew winds are the main disastrous weather for the production of late rice in Guiping County. With the expansion of late maturing and high-yielding variety “Bao Xuan No.2”, the output of late rice harvests over the years has been very volatile. For example, in 1971, the total output was increased by 50 million kilograms compared with 1970. However, the total output in 1976 dropped more than 70 million kilograms from that in 1975, and the rate of decrease in production was also greater in 1970 and 1978. Shapo commune species “package selected two” accounted for 80% of the total area, in mid-October 1978 cold weather, of which 12 teams Xin’an 36 acres, the average yield of only 25 pounds, a lot of similar situations, both with the dew related. It can be seen that it is necessary to find out the hazard law of cold and dew wind and provide the climate basis for breeding direction, collocation and rational distribution of late rice varieties, grasping the production season, making full and rational use of agroclimatic resources and ensuring stable and high yield of late rice.