Cultivation season
In all parts of Shandong, kale can be cultivated in spring and autumn. Spring hoe is planted in February-March, and the harvest period is from May to June; autumn raft can be sown in July-August, and harvesting period is from October to November.
2. Cultivate seedlings
The strong seedling of Chinese kale is a seedling with appropriate development, thick stems and large and thick leaves. The favorable environmental conditions for creating seedling growth are the basis for cultivating strong seedlings. In summer, nursery should adopt shading and cooling measures; when winter and spring are cold, plastic film can be used to cover seedlings, and fertilizer and water management can be strengthened to promote seedling growth. Seedling age 20 to 30 days, with 5 to 6 leaves, you can colonize.
3. Colonization
The condition of the soil is not strict, and all kinds of soil can be cultivated, but the fertile loam is ideal. The mustard spring planting should use sorghum and cover the mulch, and the autumn planting should be flat. Planting density, early maturity mustard (20 ~ 25) cm (30 ~ 35) cm is appropriate, medium and late maturity type is 30 ~ 33 cm square is appropriate.
4. Field management
After the plant is slowed down, the soil should be ploughed in time to promote the rapid growth of the root system. In the early stage of Chinese kale, it mainly promotes the growth of leaves, and provides sufficient nutrients for the differentiation and development of flower buds. When topdressing, it should supply sufficient nitrogen and appropriate amount of phosphorus and potassium. In the process of flower bud formation, in addition to supply foot In addition to the amount of nitrogen nutrition, phosphorus and potassium fertilizers must be added. Usually after slow seedling, 15-20 kg of urea per mu, and 10 kg of nitrogen, phosphorus and potassium compound fertilizer; after the plant is budded, the second top dressing is applied, and 10 kg of urea is applied to the mu, and the compound of nitrogen, phosphorus and potassium is combined. Fertilizer 15 ~ 20 kg; after the main harvest, and then apply a fertilizer, the amount of application refers to the second amount of fertilizer. The ability of kale to withstand drought and suffocation is poor, and water management is extremely important. In the blade growth period, it is advisable to see dryness. The flower bud formation period should keep the soil moist, and the relative humidity of the soil should be 80%-85%. Pay attention to drainage when it rains to prevent stains.
5. Harvest
The kale is a high-quality product with large stems, long internodes, and few leaves and tender leaves. In addition to harvesting the main scorpion, the side sill is also an important part of the production. In order to promote the occurrence of side squats, prolong the harvest period and increase the yield, the main flower buds should be harvested in time when they reach the same height as the leaves. Keep 4 to 5 green leaves when harvesting. After the main harvest, strengthen the management of fertilizer and water, and also harvest 3 to 5 side squats. The yield per mu can reach 1500-2500 kg.
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