我县1975年开始试种杂交晚稻,到1986年,种植面积已达18.87万亩(约占水稻面积的50％),平均单产501.4公斤,高的田块达750公斤。1987年发展到25万亩。现就本县杂交晚稻高产栽培关键技术简述如下: 一、杂交组合的选择杂交晚稻一般都有籼稻的特性,对温度十分敏感——日平均温度低于23℃,就会影响其正常扬花。因此,栽培中必须严格掌握好播种期、秧龄期。移栽期,保证安全避过9月中下旬的 In 1975, the county began to test hybrid late rice. By 1986, the area planted reached 188700 mu (about 50% of the total rice area) with an average yield of 501.4 kg and a high plot of 750 kg. Developed in 1987 to 25 million mu. Now on the county hybrid late rice high yield cultivation of key technologies are as follows: First, the choice of hybrid combinations Late hybrid rice has indica characteristics generally sensitive to temperature - average daily temperature below 23 ℃, will affect its normal flowering. Therefore, the cultivation must be strictly controlled sowing, seedling age. Transplanting period, to ensure the safety of avoidance in late September