Sweet potato high-yield new technology

First, nursery. Choose Xiangyang, the deep and fertile soil of the leeward soil layer is used as a seedbed, and the soil is finely ground. The potato seed is generally flat, and the potato surface is slightly lower than the soil surface and is consistent to achieve Qi Miao. After emergence, wait for the sunny day to uncover the two agricultural membranes to cool down, and at night must cover the agricultural film and play a role in heat preservation. After the seedlings, the film is released in time, watering and topdressing, mainly based on farmyard manure. Spraying a new high-fat film to prevent moisture evaporation, heat preservation and freezing, and isolation of pests and diseases. When the temperature is stable above 20 degrees Celsius, the film is removed and the film is removed.

Second, reasonable close planting, timely planting. Xiaoman to the summer solstice is the best season for planting red dragonfly. Plant sweet potato seedlings on sunny days, first watering, then planting. According to the ridge width, the planting density is reasonably densely planted, reaching 3,000 to 3,500 plants per mu. Then spray a new high-fat film, which can effectively prevent the moisture on the ground from evaporating, the moisture of the seedlings is not transpiration, isolate pests and diseases, quickly adapt to the new environment, and grow healthily.

Third, fertilizer management. Sweet potato is a potash crop, especially in the case of a large amount of nitrogen fertilizer, so as not to cause excessive growth of red vine, affecting yield and starch content. Note: Fertilization must be mastered, preferably 15-20 days after planting. At the same time spraying new high-fat film can prevent the infection of pathogens, improve the ability to resist natural disasters, increase the intensity of photosynthesis, and protect the growth of seedlings. During the expansion period of the potato tubers, the fruit is fermented, and the nutrient transport conduit of the underground fruit is thickened, the fruit is swollen and the fruit is smooth, the fruit is smooth, the fruit is strong, and the quality is high.

Fourth, vine management. Sweet potato is a long vine crop with suitable fertilizer and water conditions. The vine can grow to 4-5 meters. If it is not controlled, it will seriously affect the yield. The specific method is: timely cultivating the alfalfa soil and implementing the short-cut method, and spraying the foliar fertilizer, can transform the vegetative growth of the plant into reproductive nutrition, inhibit the main shoots from mad, and promote flower bud differentiation. Note that the whole red vine can not be cut off. After each short cut, the vine is lifted and placed in the original position. The vine is not allowed to completely turn the vine, avoiding disturbing the foliar coefficient, which is conducive to photosynthesis and promote high yield.

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