大白菜中后期田管周伯榆，黄美槐俗话说：“大白菜要增产，中后期管理是关键”．一、中期田管措施：当大白菜８—９片真叶，形成一个圆盘时，叫四棵．从圆棵到开始包心称莲座期．莲座期是大白菜生长中期阶段．此期，根系大量发生，根系和外叶生长迅速，生长量骤增，吸肥增... Chinese cabbage in the late field Zhou Bowu, Huang Mei Huai As the saying goes: “Chinese cabbage to increase production, the latter part of the management is the key.” First, the medium-term field control measures: When cabbage 8-9 true leaves, forming a disc, called four. From the beginning to the heart of the round lotus said rosette period. Rosette is the mid-stage of Chinese cabbage growth. This period, a large number of roots, roots and outer leaves grow rapidly, growth soared, sucking fertilizer by ...