Select the kind of supplies. Spring cabbage should be selected for a more winter, early care, high ball, heat-resistant, disease-resistant variety. Like number 3 of the cuisine。
The cabbage is a sprung crop, which can pass through spring after 10-15 days at 2-10°c and slowly at 10-15°c. Therefore, the choice of an appropriate planting period to ensure that the temperature of the seedling period is above 13°c is essential to avoid early moss and achieve high yield. The use of large sheds and small arch sheds allowed planting in mid-february, small arch sheds in early march and membrane displacement in early march; the use of large sheds allowed planting in late february and early march, and membrane displacement in mid-march and early april; and the use of small arch sheds allowed planting in late march and late april。
Fertilizing the whole place. The short, shallow-seated and fertilized nature of the spring cabbage requires the selection of deep and fertile sandy land to be grown, with large cabbage not subject to heavy stress, preferably in rotation with eggplant and cross-flower crops. Two to three times before planting, the fields were ground-breaking, with 3000 kg and 30 kg combined fertilisation of three dollars per 667 square metre before the last tillage。
Shrimp management. Because of the low temperature of the spring water, the choice should be made to have a good discharge, with low-ground fields, high-seas narrow compartments, membranes to cover cultivation, and bottom water to cover the membranes with minimum growth. This would facilitate the improvement of soil temperature and the acquisition of pre-maturity. Because of the short reproductive period of spring cabbage, the base fertilizer should be based on quick-impact fertilizers to meet the absorption of crops during the season. In general, 2000 kg of decomposition organic fertilizer, 40-50 kg of compound fertilizer and 50-60 kg of oil are used per acre。
Reasonable secret. Due to the short reproductive period of spring cabbage, the density is slightly higher than in the positive season, usually around 3,500 units per acre. After seedlings, 2-3 real leaf time seedlings and 5-6 real leaf seedlings. Re-utilized fertilization during the start-up period and during the lotus period in order to facilitate the rapid growth of the plant, usually 10 kg of urea per acre, with mixed application of decomposed human urine。
