Hesui Red Heart Sweet Potato Origin Heshun Village, Fengtang Town, Chao'an County has a long history. Since the Ming Dynasty has been cultivated for several hundred years, it is a typical regional variety. This species is a long vine, heart purple red leaves, heart-shaped leaves, stems and vines, more resistant to pests and diseases, adaptability. The fragrant chunks are soft, delicate, sweet, smooth, cooked, and not rotten, and they have good taste quality. Due to the long-term use of vines to breed, the varieties are degraded, resulting in low yield and instability, and the quality is declining. This has hindered the development of sweet potato production in Hexin. In recent years, this species has been screened and purified. According to different purposes, the selection of thin, bright red meat suitable for post-processing type of potato and two varieties of good potato, high yield and high quality fresh type, so that this regional variety of production and quality has been greatly improved . Then introduce its high-quality and high-quality cultivation techniques as follows: 1 Fine selection The loose soil environment is conducive to the growth of sweet potatoes. Sandy loam soil with convenient drainage and irrigation should be selected, and the former is best for rice. Due to the practice of paddy-upland rotation, the disease and insect pests are generally less, and the concentration of soil salt can be reduced, which is more suitable for the stable growth of sweet potato, and provides basic conditions for high yield and quality. 2 Cultivate strong seedlings The pre-plant breeding with the excellent strains that have been bred from the rejuvenation and rejuvenation is needed to provide the seedlings needed for field cultivation, and the plants for late-planting should be nursed before the end of May. Seedlings are planted in multiple rows (usually 5-6 rows) to cultivate strong and robust seedlings, which will lay a good foundation for high-quality cultivation. 3 Moderately sparse Practice has proved that moderately diluted planting can significantly increase the rate of large potatoes, thereby increasing the commodity price of potatoes. The average plant spacing is 115-120cm25-28cm, that is, planting 2000-2500 potato seedlings per acre. According to the results of the actual survey, the large potato field (with a weight of 200 grams or more) that uses the sparse planting technology accounts for more than 90.5% of the total potato production, which greatly improves the economic benefits. 4 straw cover Straw cover, the first is the reuse of resources; the second is to increase the survival rate of sweet potato, ensure seedlings and strong seedlings; third is to inhibit the growth of weeds, free from cultivator weeding, saving labor; Fourth, play a moisturizing and drought-proof effect. The specific approach is: After the sweet potato is planted, it covers the rice straw horizontally. After covering 2-3 nights, the above-ground parts of the potato seedlings are carefully planted and the rice straw remains on the yam. 5 Picking Branches The species is long-grassed, with few branches in the early stage and fast growth. Topping can effectively control its growth rate, reduce the occurrence of lateral roots of potato vines, promote early branching, and change vines into clustered three-dimensional potato vines, increase the utilization of light energy, and also improve the microclimate in the field. Picking up the heart should be carried out in the early stages of the growth of sweet potato. Generally, the first picking is started 15 days after planting and then every 10 days or so until the expansion of the tuber. 6 Fertilization Management Sweet potato is a root crop, and base fertilizer is suitable for organic fertilizer such as ash and peanut cake. The amount of application depends on the fertility of the soil. The application method uses deep strips and applies peony after application. Top dressing uses pre-control, in-promotion and after-supply techniques. Good fertile soil with good soil quality should not be fertilized within 60 days after planting. The use of nitrogenous fertilizer should be controlled 45 days before planting. The degree of "pre-control" is that the vine is light green. When the tubers begin to enter the period of enlargement, combined with the removal of weeds (the straw is generally not advocated cultivator) to re-apply medium-term fertilizer, high-quality compound fertilizer 15kg can be applied per acre. After the autumn potato enters the winter, it should be considered as its growth condition (if the reddening occurs prematurely), the vine leaf fertilizer should be thinly applied, and the application of potassium sulfate or potassium nitrate should be 7~10kg to increase the accumulation of photosynthate and improve the quality of the tuber. 7 Water Management In the autumn potato planting in Guangdong, the growth period in the normal years before planting to the beginning of winter is in a period of high temperature and high humidity, and rainfall is sufficient. During the rainy season, waterlogging should be taken into consideration to reduce soil moisture content in the field and create favorable conditions for early tubers. After entering the winter, less precipitation and a drier climate, attention should be paid to late water management. If the vine leaves appear slightly wilting phenomenon, it is necessary to timely infuse the horse water, that is, irrigation and row, in order to facilitate its normal growth, so as to achieve high yield and quality. 8 Pest control Although sweet potatoes are prone to grow long, the prevention and control of pests and diseases cannot be ignored. The main insect pests are sweet potato, wild leeches, potato weevils, aphids, and sweet potato leaf worms. They can use 8% of dichlorvos-emulsifiable concentrate or 2,000 times of 20% of good Dongyin cream. The main diseases are scab, stalk rot, rickets and so on. The potato seedlings can be soaked with 70% thiophanate-methyl 500-fold solution or 80% dexamethasone 300-500-fold solution for 10-15 minutes prior to planting to kill pathogens on the surface. In the early stage of disease, Daejeon can use 70% thiophanate-methyl 800-fold spray, spray once every 7 days, or use a 75% difenofluid 500 times solution, at least 3 times. 9 timely harvest When the potato vines come out of the red, they enter the growth stagnation period and pay attention to timely harvest. It is generally harvested before frost to ensure that the sweet potato is not affected. When harvesting, the entire plant should be dug, and after removing the small sweet potato, the dried sweet potato, and the mixed root, a few plants can be bundled into small bundles, gently moved and gently placed to minimize the damage to the peel. 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