Study On Physiology And Spring Sowing Planting Techniques Of A New Chinese Cabbage Variety Weichunbai Ⅱ

This experiment was studied the physiology, adaptation and correlative planting techniques of Weichunbai Ⅱ Chinese Cabbage.The results of the adaptation research on Weichunbai Ⅱ Chinese Cabbage shows that: The grow period of Weichunbai Ⅱ is 62 days when planted in spring, the winter adaptability is strong. The weight of the single plant is 3.46kg, the weight of the single head is 2.6kg and the only vegetable rate is 72.6%. The yield of it per 667m2 is 5260kg. The fresh types of Weichunbai Ⅱ contain 5.12% dry material, 2.08% soluble sugar, 1.29% soluble protein, 560mg/kg Vitamin C, 1.15% crude fiber, 41% soft leaf rate. It is crisp, edible and good flavor. It can anti viral disease, frost mildew, soft rot and black spot disease. Therefore , the cultivating properties being above mentioned of Weichunbai Ⅱ is consonant with the variety that can be cultivated in WeiFang city, Weichunbai Ⅱ is fit for cultivating in spring in Weifang city.The results of the adaptive cultivating techniques on Weichunbai Ⅱ Chinese cabbage shows that:If cultivating Weichunbai Ⅱ in Weifang city, the main techniques being under mentioned can be mastered.1 .hi average year, Weichunbai II can be planted in the end of March or in the beginning of April, the average temperature rises to 13~15 degree. Also in the first 10 days of the March, growing seedlings can be carried on big house or the cold fiame grows seedlings. The temperature of the outside is not lower than 8~10°C at night. When planting field, usually in the mid-ten days of April. But if we meet the spring cold weather year, we should first see the temperatures and delay the sowing time.2.1t can be planted with ridging direct seeding, mulching plastic cover. .It can use a wild-narrow rowing spacing planting, the density is 2, 500 plant per 667 nr\3. It requires correct topdressing. During the production process of the Chinese cabbage, 10kg urea, 10kg calcium superphosphate and 15kg potassium chloride should be used per 667m2 each time with watering.4. Preventing the plant disease should be strengthened<> In principle, preventing is the first and is more important than curing. When the bun heart of the Spring Chinese Cabbage has reach 90% mature, prompt harvest should be done to guard against the nonessential losses. The late harvesting of the Chinese cabbage can affect the quality. The Chinese Cabbage that is planted growing seedlings can be harvested in the end of April or in the beginning of May. Also the Chinese Cabbage that is directly seed in soil can be harvested in the end of May or in the beginning of Jun.