一、品种选择品种可选择日本的“二十日大根”和“四十日大根”。这两个品种的肉质根均为圆形,直径2～3厘米,充分膨大的单根重15～20克(商品成熟要求单根重10～12克),根皮红色,肉为白色,株高20～25厘米,适应性强,不耐热,适宜早春、秋季露地和冬季保护地栽培。两者主要区别为:前者喜温和气 First, the variety of varieties can choose Japan’s “20 days ” and “40 days ”. The fleshy roots of these two varieties are all round, with a diameter of 2 to 3 cm. The fully expanded single root weighs 15 to 20 grams (the single root weight of the product is required to be 10 to 12 grams), and the root bark is red and the meat is white. High 20 ~ 25 cm, adaptable, heat-resistant, suitable for early spring, autumn and winter protected areas of open field cultivation. The main difference between the two is: the former likes mild gas