一绪言我国北方城市在冬季里菜蔬的供应,除开少数是由南方运来外,主要是靠着温室与阳畦里菜蔬的栽培与窖藏的白菜。城市冬季菜蔬供应的两个大问题:温室西红柿的落花不孕,与窑藏白菜的脱帮(即落叶),都曾有人企图使用类似生长素药剂的喷射来防止前一个问题,防止西红柿的落花不孕用2,4二氯苯酚代乙酸(简称2,4-D)这颠药剂已收到显著的成效,广泛地在 First, the supply of vegetables in winter in northern China’s cities, except for a few shipped from the south, mainly by lettuce and greenhouses cultivation and storage of cabbage cabbage. There are two major problems in winter vegetable supply in cities: falling flowers and infertility in greenhouses and desoldering (or deciduous) leaves of cabbage in kilns. Attempts have been made to prevent the previous problem by using sprays similar to auxin to prevent the falling of tomatoes 2,4-D Dichlorophenol Acetic Acid (2,4-D) for infertility This topical agent has received significant results broadly in