西安市阿房区三民村蔬菜技术员萧俊,将大白菜种株不经过冬季贮藏,提早于冬至前后定植于大田。经过他连续五年的试验和58年我们在全区的推广,认为这种留种技术有下列优点:(1)冬至前后栽植大白菜种株,这时芽子尚未萌动,削头时不致损伤嫩芽。(2)提早产生新根,经过冬季锻练,增强了早春的抗寒 Xiao-Jun, a vegetable technician at Sanmin Village, A Fang District, Xi’an, planted the cabbage plants in the fields before and after the winter solstice. After five years of continuous testing and 58 years of our promotion in the whole region, we think that this technique of seed-keeping has the following advantages: (1) Before and after the winter solstice, cabbage plants are planted, and buds have not sprouted yet, Buds. (2) early generation of new roots, after winter training, enhance the early spring cold