我省是典型的双季稻区。据1984—1986年统计,早、晚稻的播种面积分别占全年水稻播种面积的47.84%和52.16%,总产分别占全年总产的51.03%和48.97%,所以早晚稻的生产水平如何,直接影响到全年稻谷产量。一、早晚稻亩产发展概况解放37年来(1949年至1986年)水稻的年亩产量是22年增,10年减,5年平(增减2.5公斤以内,下同),其中:早稻是23年增,11年减,3年平;晚稻是20年增,10年减,7年平。早晚稻亩产的变化可以分为三个时期。 My province is a typical double cropping rice area. According to the statistics of 1984-1986, the sown area of ​​early and late rice accounted for 47.84% and 52.16% of the annual rice sown area respectively, accounting for 51.03% and 48.97% of the total annual output respectively. Therefore, the production level of morning and evening rice, Directly affect the annual paddy output. First, the morning and evening paddy mu yield development Liberation 37 years (1949 to 1986) annual output of rice is 22 years, 10 years, 5 years (increase or decrease 2.5 kg, the same below), of which: early rice is 23 years increase, 11 years decrease, 3 years flat; late rice is 20 years increase, 10 years decrease, 7 years flat. Morning and evening rice yield changes can be divided into three periods.