白菜是我国北方广大地区冬春两季的主要蔬菜。宋代陆游曾有一首题目叫《菘》的诗:“雨送寒声满背蓬,如今真是荷锄翁。可怜遇事常迟钝,九月区区种晚菘。”菘即是白菜。白菜味美价廉,含有比较丰富的蛋白质、碳水化合物、脂肪和多种维生素以及钙、磷、铁等矿物质,这些都是人体必需的营养素。其中丙种 Chinese cabbage is a major vegetable in winter and spring in vast areas of northern China. There was a song in Lu Song of the Song Dynasty entitled “菘” poem: "Rain cold sound full of Pompon, now is really Hoe Weng. Cabbage is inexpensive, rich in protein, carbohydrates, fats and vitamins and calcium, phosphorus, iron and other minerals, which are essential nutrients for the body. Which species of c