Winter cultivation technology of greenhouse

It is also known as vegetable tincture. The flower moss and tender leaves of the vegetable heart are edible parts. The quality is crisp and tender, the flavor is good, and the nutrition is rich. The cultivation techniques are as follows:

First, cultivate strong seedlings:

1. Variety selection: Select the late-maturing variety Willow Leaf Chixin, which has strong cold resistance and has both main and side moss.

2. Seeding: The greenhouse seedlings are selected in early October. The nutritional soil is prepared by mixing 1200 kg of fertile field soil with 800 kg of decomposed ring fertilizer, adding 3 kg of diammonium, and spreading it on a 20-meter 2 seedbed for use. After leveling the seedbed, pour foot water, cover the film, and bake for 3 to 5 days to increase the temperature of the boil. The seed volume per acre is 50g. Dry seeds are broadcast directly. After sowing, they are covered with fine soil 1cm.

3. Seedling separation: After the emergence, remove the small arch shed on the seedling bed to reduce the humidity. Before the seedling separation, perform appropriate ventilation to strengthen the low-temperature exercise of the seedlings. About 15 days before seedling preparation, prepare seedlings (the method is the same as the seedbed), seedling selection should be performed on a clear day, and the seedling should be 10cm square.

4. Seedling stage management: Temperature management in the seedling stage should be carried out in stages: in order to promote rapid emergence during the germination stage, the day temperature should be maintained at 25-30 ° C, and the night temperature should not be lower than 15 ° C. Maintain the temperature at 20-25 ° C and night temperature of about 15 ° C. Slowly lower the temperature after watering the seedlings slowly. During the day, maintain 15-20 ° C and the night temperature is above 10 ° C. The seedbed is watered once 4 to 5 days before planting, and seedlings can be dug and stored the next day.

2. Planting: Before the planting, sufficient base fertilizer should be applied, 5000 kg of high-quality rotten fertilizing fertilizer and 30 kg of phosphorus and potassium compound fertilizer should be applied per acre, 20-30 days after sowing, and 5-6 pieces of real leaves can be planted. The planting density is 18 × 22cm. Shed to raise the ground temperature.

3. Field management after planting:

1. Water and fertilizer management: On the basis of the water for planting, slow watering of seedlings should be irrigated again 7 to 8 days after planting, and weeding and weeding is needed to promote the growth of roots. After the seedlings are slowed down, the water should be properly controlled before the buds emerge In the period of vegetable growth and harvest, it is necessary to increase the number of waterings to maintain soil moisture. During the entire growth period of cabbage, topdressing is performed 1-2 times, and urea is applied at 10 ~ 15kg per mu.

2. Temperature management: The production of cabbage is protected. Temperature management is very important. The slow seedling period after planting is maintained at 20-25 ° C during the day and 15-20 ° C at night. The temperature is maintained at 18-22 ° C, and the night temperature is 12-18 ° C. From the bud to the harvest period, the daily temperature is required to be maintained at 15-20 ° C, and the night temperature is 10-15 ° C. During production, the temperature of the straw mat uncovering and the length of the vent should be adjusted according to the temperature requirements for the development of the cabbage.

4. Harvesting: The standard for picking cabbage is: "Qikou flower" is harvested, that is, the height of the calyx is about the same height as the apex of the outer leaf, when the bud is about to open.

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