勐海县属亚热带地区,光照、热量、雨量比较充足,有发展水稻生产的优越自然条件。在全县六十万亩耕地中,水稻面积占一半左右,而产量占全县粮食总产的78.7％。其中,一季中晚稻占全县水稻面积的83.2％,产量占81.3％。因此,一季中晚稻在全县粮食生产中占有举足轻重的地位。但是,多年以来,单产在250—400斤左右波动,障碍因素在哪里?能否有个较大的突破?我们于一九七九年十一月提出了开展中稻千亩丰产样板的计划经一九八○年贯彻执行中,实际种植1122亩,平均单产803.2斤,超过了原订700斤的指标。下面,我们就千亩样板赖以 Menghai County is a subtropical region, light, heat, rainfall more adequate, there is the development of superior natural conditions of rice production. In the county 600000 acres of arable land, the rice area accounts for about half, and the output of the county’s total grain output of 78.7%. Among them, a season of late rice accounted for 83.2% of the county’s rice area, the output accounted for 81.3%. Therefore, a quarter of late rice occupies a pivotal position in grain production in the whole county. However, over the years, yields have fluctuated around 250-400 pounds and where are the obstacles? Can there be a big breakthrough? In November 1979, In 1990, 1122 mu of land was actually planted, with an average yield of 803.2 kilos, exceeding the original target of 700 kilos. Below, we rely on the model acres