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霜冻是银川灌区春季蔬菜、瓜类、果树花芽、油料作物及秋季晚秋作物的主要自然灾害之一。有的年份,由于春、秋霜冻,上述作物都遭受程度不同的危害,造成减产损失。如1971年5月5～6日的春霜冻,灵武县园艺场及区农科所等单位果园的苹果花芽冻死40～50％,造成当年水果大减产;1972年出现的秋霜冻,使一些地区正在灌浆的晚秋作物受到很大影响,一般损失10％左右。为了防御春、秋霜冻,有些地方每年都要烧掉大量柴草,而且效果也不理想。 1973年我站接受了试制防霜烟雾剂的任务,在自治区气象局及县农林局的指导、支持下,并得到有关单位的协助,初步试验成防霜烟雾剂和人工造雾。现简介如下:
Frost is one of the major natural disasters in spring vegetable, melon, fruit tree flower buds, oil crops and autumn and autumn crops in Yinchuan irrigation area. In some years, due to spring and autumn frost, the above crops have suffered from different degrees of harm, resulting in loss of production. Such as the May 5, 1971 spring frost, Lingwu horticultural field and District Agricultural Science and other units orchard apple flower freeze-dried 40 to 50%, resulting in a substantial reduction of fruit that year; the emergence of autumn frost in 1972, so that Late autumn crops that are being grouted in some areas are greatly affected, with a general loss of around 10%. In order to prevent spring and autumn frost, some places burn a lot of firewood every year, and the result is not satisfactory. In 1973, I accepted the task of trial preparation of anti-frost aerosol. With the guidance and support from the Meteorological Bureau of the Autonomous Region and the Bureau of Agriculture and Forestry, and with the help of the relevant units, I initially experimented into anti-frost aerosol and artificial fogging. The brief introduction is as follows: