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大白菜是我国最重要的秋菜之一。在北京地区较好的田块亩产荒菜可达2万斤左右,一般上市的商品白菜撕去叶梢叶耳,晾晒2—3天后,其损耗率为15—20%。如将包头青、拧心青等大型品种的不包心外叶及叶柄全部去掉,计算其净球重,仅占荒菜重的50—53%。管理好的丰产田块,球重也仅占荒菜重的55—60%。对于结球性能较好的小青口品种,其净球重可超过60%。市场上根据白菜结球的好坏分为一、二、三级及等外菜四类。一般上市的一级菜约占30%左右,二级菜占40%,三级菜占25%,等外菜占5%。因此,如何在不断提高白菜
Chinese cabbage is one of the most important autumn vegetables in China. Field plots in Beijing better mu shortage of food up to 2 million pounds, the general market for the removal of cabbage leaf tip leaves, drying 2-3 days after the loss rate of 15-20%. Such as the Baotou green, screw heart and other large varieties of non-heart-shaped outer leaves and petioles are removed, calculate the net ball weight, accounting for only 50-53% of wild vegetables weight. Good management of high yield plots, the ball weight is only accounted for 55-60% of wild vegetables. For the small ball Qingkou mouth better performance, its net weight can be more than 60%. According to the market on the cabbage is good or bad divided into one, two, three and other food outside the four categories. Generally listed about a dish of about 30%, two dishes accounted for 40%, three dishes accounted for 25%, and other dishes accounted for 5%. Therefore, how to continuously improve cabbage