Cultivation Techniques of Brassica oleracea

1. Timely sowing Timely sowing is one of the important technical measures for spring cabbage cultivation. If sowing is too early, the growth of seedlings is large, and the continuous low temperature in early spring causes the seedlings to pass through the vernalization stage prematurely, and it is prone to cause early bolting. On the contrary, sowing Too late to delay the maturation period and affect economic efficiency. Generally, in the middle and late February to mid-March in Hangzhou, the planting seedlings are planted in protected areas, and the seeds are sowed. The seedbeds are irrigated before sowing. The seeding rate is about 25g per acre field.

2. Seedling management In order to cultivate strong seedlings, temperature management at the seedling stage is very important. After sowing, the temperature is controlled at 20-25°C during the day and around 10°C at night. If low temperatures are encountered, straw curtains need to be covered at night and the temperature after the seedlings are equalized. It can be reduced appropriately, and it should be ventilated timely on sunny or rainy days. After the emergence of seedlings, pest control and pest control were promptly performed, and the diamondback moth was sprayed and sprayed with Haizheng to control the occurrence of cabbage damping-off. The criteria for strong seedlings are dark green leaves, thick and large leaves, thick stalks, short internodes, well-developed root systems, and disease-free seedlings.

3. Colonization According to the climatic conditions in Hangzhou, it is generally planted in Daejeon in the middle and early April, with seedlings having 6 to 7 leaves. The base fertilizer should be applied 10 days before planting, and the N, P, and K ternary compound fertilizer should be applied per acre. Kilograms, 35 kg of phosphate fertilizer, combined with open trenches and soil covering after fertilization, 1.2 meters wide with ditch, plant spacing 4050 cm, seedling 3000-3200 per mu.

4. In order to improve the survival rate of seedlings, the field management should be watered in time after planting, and the gutters should be drained during the growth period to keep the roots developing well. Timely use Haizheng to control the damage of cabbage caterpillars. During the period of rosette, timely dressing is required to prompt the ball to expand rapidly, and fertilization is stopped one month after the rosette period.

5, harvesting is generally in mid-June, when the ball is fully grown, tight, the ball can be harvested when the weight of 1.5-2, can also be based on market conditions, if the vegetable price is low at this time, can be delayed Harvested.

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