The use of plastic sun greenhouses for the cultivation of strawberries in the deep winter season can make strawberries appear before and after the Spring Festival. The economic benefits are considerable. The cultivation techniques are as follows:
First, the construction of solar greenhouses Currently, the use of "a slope of a slope" or "string-style" solar greenhouses for production. The method of construction is the same as that of a greenhouse for cultivated vegetables.
II. Rational breeding of strawberry seedlings for deep winter cultivation In the solar greenhouse, the whole winter will bring about the cultivation of strawberries. In addition to selecting the fine varieties, the main one is the breeding of robust seedlings for planting in the solar greenhouse. There are two ways to raise seedlings. One is to choose a good strawberry variety. Before the end of March, the selected seedlings will be planted in open field with a density of 2,000 plants per acre. By mid-August, more than 15 plantlets will grow per plant. The other is to raise the seedlings in the production field. After the strawberry harvest is completed, the seedlings will be planted in about the first half of June. The method is to go one line at a time to go one line; then the rest of the line, a strain to go to a plant; and timely cultivator eradication, topdressing water, promote stems of the pumping and robust. Using the above two methods, after a large number of stolons grow out, the stolons should be pulled out in time to the surrounding of the mother plant, press the soil on the 3rd and 4th section to promote hair roots, and when the stolons grow to 3-4 pieces of compound leaves, Cut off with the mother plant, so that they become independent seedlings.
Third, timely planting and colonization 20 days before and after planting, in the greenhouse planting zone watering stumbling, and then Mushi quality farmyard fertilizer 5000 kg, superphosphate 100 kg, potassium sulfate 15 kg, 250 kg of fermented cake fat. Spread the fertilizer evenly on the ground and plunge it twice, with a depth of 20 to 30 cm.
Before and after the beginning of autumn, choose a cloudy day or planting in the afternoon. It is better to transplant with soil. It is better not to bury the roots above the depth of transplanting and not to expose the roots.
When the planting pattern of the north and the south is adopted, the total width of each plant is 80 centimeters, and each plant is planted with two rows of plants, each planting spacing is 20 x 40 centimeters, and 8,000 planted acres.
IV. Management techniques after planting
1. Reasonably regulate the temperature and humidity from the shed to the initial stage of flowering. Keep the room temperature at 25-30C during the day and 12-15°C at night, and not lower than 5°C. During the fruiting period, control the temperature at 22-25°C during the day of fruit enlargement. About °C; mature period of the daytime temperature of 20-24 °C, about 5C at night. In general, it is necessary to pour a large amount of water before freezing. With the principle of irrigating the mash, the water requirement of the fruiting of the strawberry can be basically satisfied. Into the winter, if you need watering, you must under the film dark irrigation.
2. Timely cover the greenhouse film or plastic film temperature within the shed does not exceed 35 °C, when the outside temperature drops to 0C, cover the mulch, and mulch film, so that the seedlings placed on the mulch film under the film to create a dark ditch .
3. Thinning and thinning fruit to improve fruit setting rate The standard for fruit thinning is to leave 10 young fruit for strong seedlings and 7 young fruit for weak seedlings.
4. The scientific top-dressing top dressing should grasp the principle of “diet small mealsâ€. Each time after each acre, 15 kg of ammonium nitrate and superphosphate should be applied, and 15 kg of nitrogen, phosphorus, and potassium compound fertilizer should be used. From the top of the flower buds, once in 20 days, turn the fertilizer on and then pour water. In addition to the above top dressings, plant regulators and carbon dioxide fertilization can also be used.
Recommended reading: Strawberry seedlings: http://?Client_ID=24374&Edition_ID=1&mid=11769
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