近年我局所属农场油菜死苗相当严重。据调查,1975～76年共播种41,200亩,冻死无收的23,950亩,占播种面积58.2%。1976～77年播种33,280亩,其中生长较好、冻害较轻、亩保留苗万株以上的7,393亩,占播种面积22.2%;生长较差、冻害较重,亩保苗5,000株左右的6,677亩,占播种面积20.1%;冻害极重,收成很少或基本无收的19,210亩,占播种面积57.7%。如按1975年亩产142.5斤计 In recent years, our bureau belongs to farm rapeseed seedlings is quite serious. According to the survey, from 1975 to 2006, a total of 41,200 mu of seeding and 23,950 mu of frozen crops were collected, accounting for 58.2% of the sown area. From 1976 to 1977, sowing 33,280 mu, of which growth is better, less frost damage, mu reserves of more than Million million 7,393 acres, accounting for sown area of ​​22.2%; poor growth, severe frost damage, Mupu 5,000 5,000 or so 6,677 acres, Accounting for 20.1% of the sown area; 19,210 mu of land with extremely heavy damage, little or no harvest, accounting for 57.7% of the sown area. If by 1975 mu produce 142.5 kilograms