1. Variety selection. Spring sowing Chinese cabbage should use low-temperature resistance, late bolting, early maturing, disease resistance, good early maturing varieties, common autumn and winter Chinese cabbage varieties are not suitable for spring off-season cultivation. 2. Suitable sowing. The sowing date of spring sowing Chinese cabbage is too early, the temperature is low and it is easy to pass the vernalization, and there is an unripe convulsions and there is a risk that the seedlings will be frozen. Late sowing, although not easy to twitch, but the late temperature is too high, it is difficult to form leaf ball, and serious pests and diseases. Should ensure that the average daily temperature during the growing season of spring sown cabbage is stable above 13°C, and sowing according to the cultivation facilities and varieties in advance or postponed. The mulching film covers the live broadcast and is sown in late March and early April, and harvested from the end of May to the beginning of June. 3. Colonization. The seedling age is about 40 days, when there are 6-7 leaves when the sunny planting. Do 1 meter wide rake, 2 lines per pod, plant spacing 40 cm, 3000 cultivars per mu. Before planting, the mulch was covered with a plastic film. After planting, the urine was excreted and the membrane hole was sealed with mud. 2 seed seeds sown in each hole broadcast, covered with plastic film after sowing, after 5 days or so, the seedlings will be broken and film will be released immediately, the plastic film breaks will be firmly pressed with soil, and the seedling will be seedling after 10 days and time. 4. Field management. The spring cabbage has a short growing season. After the planting, the management will be promoted and the promotion will be promoted. The basal fertilizer is applied before planting, and the urea or human excrement is applied in time according to the growth of the plant. In the early, middle and late stages of leaf ball growth, water and fertilizer management must be strengthened to promote the development of the spherules as soon as possible so that the rate of vegetative growth exceeds the rate of reproductive growth, and leaves can be successfully formed before the high temperature rainy season. However, do not apply human excreta during high temperatures so as to avoid the occurrence of diseases. Spring sowing cabbage watering principle is less pre-casting, later poured more. In the early period, the ground temperature is lower, less watering can avoid lowering the ground temperature, which is beneficial to the growth of Chinese cabbage roots; more watering later, fully supply the water needs of the Chinese cabbage, but the amount of watering should not be too large when watering. In order to avoid rot. Gelatin Size 1 Empty Capsule,Hpmc Empty Gelatin Capsules,Empty Capsules Size 1,Mixed Empty Pill Capsules Ningbo Jiangnan Capsule Co., Ltd. , https://www.jncapsule.com