With the rapid development of the market economy, farmers have begun to use the greenhouse to grow sweet potatoes in order to improve the efficiency of farming and give full play to the advantages of the market. The main cultivation techniques are as follows.
1. Choose excellent varieties. Choose a new sweet potato variety, Beijing Red, which is high-yield, high-quality and can meet market demand.
2. Cultivation of sweet potatoes in greenhouses should catch four mornings. That is, early breeding, early shed, early stage preparation, early planting. The efficiency of commodity sweet potato has a direct relationship with the listing sooner or later, and only the morning market can obtain higher benefits.
3. Nursery. The time is from March 15 to 20, and it is necessary to raise 4 m2 of seedling beds per 667 square meters, and 75 kg of seed potatoes. You can use the warm shed to raise the raft, or you can choose the plenum in the courtyard to buckle the cold shed. The method is: digging the soil layer 0.5m, laying 20cm of cattle and horse manure, after watering, laying 10cm of fine sand, placing seed potato, then covering 3cm fine sand, and covering with a thin film for heat preservation and moisturizing.
4. Planted in a greenhouse. The time is April 20, and the shed will be buckled 15 days before planting, and the ground temperature will be raised. For every 667 square meters, the farmer's fertilizer is 4000-5000kg, and the diammonium is 15kg. The whole site is made up, the table top is 50cm wide, the table height is 20cm, the large row spacing is 80cm, the small row spacing is 17cm, and the plant spacing is 20cm. 8,000 plants per 667 square meters.
5. Field management. Weeds should be removed in time, and water should be timely in the early stage of the formation of sweet potato roots and the expansion of potato chips.
6. Harvest time. Harvesting began in mid-August.
7. Yield and benefit. The average yield of fresh sweet potato is 0.57kg, the output per 667 square meters is 4500kg, the average market price is 1.60 yuan/kg, and the output value per 667 square meters is as high as 7,200 yuan. After deducting the skeleton, greenhouse film and iron wire for the construction of greenhouses, the investment is 1917 yuan. , the net income per 667 square meters is 5283 yuan. The efficiency of 667 square meters of greenhouse sweet potato is equivalent to 10 times that of corn.
Freeze-dried Half Of Vegetables
Freeze-dried Vegetables into powder will not affect its nutrition. Normally heat-sensitive substances are lost at high temperatures. For example: traditional high temperature drying technology. Freeze-drying technology and sun drying, drying, spray drying and so on are drying technologies, different drying methods have different effects on the quality of products. Freeze-drying method has less damage to the product. The traditional drying method is above 0℃, while the freeze-drying technology is simply understood to sublimate the moisture of fresh food under the vacuum and low temperature environment, and retain its original nutritional composition, appearance, size and other biological characteristics.
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