胡麻,为我省坝上地区主要油料作物,全省种植面积达180万亩左右,也是我国胡麻重要产区之一。坝上地势高亢、气候冷凉、海拔高、纬度大、无霜期短,再加上目前缺乏早熟品种,常因早霜危害,使胡麻不能正常成熟,造成产量低而不稳。据多年统计,胡麻产量与早霜来的迟早成正相关,早霜来的越迟产量就越高,反之就越低。近几年冀中南试种胡麻成功,虽没有霜害,但容易遇到6月份以后的雨季,使胡麻徒长、倒伏,加上胡麻开花期长,很难正常成熟,减产十分严重,同时还影响夏播。为此,掌握好适时早收,可趋利避害。 Flax, the main fuel crops in the dam area of ​​our province, the province planted area of ​​180 acres, is one of the important producing areas of flax in our country. High terrain on the dam, cool climate, high altitude, latitude, frost-free period is short, coupled with the current lack of precocious varieties, often due to early frost damage, so flax can not be normal maturation, resulting in low and unstable output. According to statistics for many years, the yield of flax has a positive correlation with the sooner or later of early frost. The later the early frost comes, the higher the yield is, and vice versa. In recent years, Jizhongnan test flax success, although no frost damage, but prone to rainy season after June, making flax growth, lodging, coupled with flax blossom long period, it is difficult to normal maturity, production is very serious, but also affect the summer broadcast. To this end, a good grasp of early harvest, can be beneficial to avoid harm.