丽水地区,原种植的老品种白菜型土种油菜,病害严重、产量低。推广新品种甘蓝型油菜以后,又普遍发生“花而不实”的问题。为了发展油菜生产,提高油菜产量,1974年冬,我们对甘蓝型油菜“花而不实”问题进行了田间试验,探讨病因和防治方法。试验结果证实了甘蓝型油菜“花而不实”是由于土壤缺乏微量元素硼所引起的营养生理性病害。施用 Lishui region, the original planted old varieties of cabbage soil rapeseed, serious disease, low yield. After the promotion of a new variety of Brassica napus, the problem of “blooming but not real” occurred again. In order to develop rapeseed production and improve rapeseed production, in the winter of 1974, we conducted field trials on the problem of “blossoming but not real” in Brassica napus, and discussed the causes and prevention methods. The results of the experiment confirmed that “Brackish flowering rape” is due to the nutrient-physiological diseases caused by the lack of trace elements boron in the soil. Application