目前京郊荷兰菜花采原种方法是:“成株搬大坨”即十月上旬将秋菜花结球好的标准成株起成大坨,重新栽在采种温室里。此法的主要缺点是:根系老化,伤根过多,叶面积蒸腾超出根系吸水,使一些叶片过早枯萎脱落,由于叶片面积大大减少,造成光合作 At present, the original method of planting flower seeds in the suburbs of Beijing is: “Growing large lumps into an adult plant”, that is, a standard plant made of autumn cauliflower in early October became a large lump and replanted in a greenhouse for seed production. The main drawbacks of this method are: root aging, excessive wounding, transpiration of leaf area beyond the root to absorb water, causing some leaves to wither and prematurely to wither and fall off. As the leaf area is greatly reduced, the light cooperation