Good seed and high yield! Detailed explanation of planting techniques of Sweet Potato "Sweet Potato King"

Sweet potato is one of the better varieties of sweet potato, because sweet potato tastes very soft, waxy and sweet, and is loved by many people, so the demand for sweet potato is increasing. So what are the high-yield planting techniques of sweet potato?

I. planting time of sweet potato

Because the climate is different in each place, and there are many varieties of sweet potato, the planting time of sweet potato is different. It is generally planted from April to May in the north and from March to April and from September to October in the south. Choose to plant in the spring, but also because Rain Water is relatively abundant, which is more helpful for raising seedlings.

II. Field management of sweet potato

1. Management in the stage of rooting and slowing seedlings.

The stage of rooting and slow seedling is from the growth of new roots after planting to the beginning of root formation, which takes about one month. Sweet potato seedlings should be checked and replenished in time after planting to ensure the whole seedling, and in case of severe drought, slow seedling water should be poured in time in order to take root and survive. Generally, it should be watered once after planting, and then ploughed every 10-15 days to loosen the soil, raise the temperature, eliminate weeds, and timely spray new high-fat film to promote the rapid growth of the plant and facilitate the formation of roots.

2. stage management of branching and tuber setting.

With the increase of temperature 30-40 days after planting, the growth of stems and leaves accelerates, and the tuber roots continue to form and expand, and the management of water and fertilizer should be strengthened in time. In case of drought, 5 kg urea per mu can be applied, and soil moisture should be preserved by ploughing and loosening soil as early as possible after watering.

3. Management of stem and leaf growing tuber root expansion stage.

From the first half of July to the last ten days of August, the stem and leaves grow and the root expands, and the leaf area coefficient reaches the maximum. generally, in this period, it is necessary to promote both control and control. This period is in the rainy season, the temperature is high and the plant grows fast. in order to prevent overgrowth, 50PPM paclobutrazol solution plus Diguo Zhuangtiling can be sprayed evenly in the field, and the leaf surface is covered with liquid medicine without flow, which can promote fruit development and make sweet potato high quality and high yield. In this period, the root of the underground tuber expands rapidly, in case of summer drought, it needs to be watered, but the amount of water should not be too large. In order to promote the expansion of potato cubes, one bag of (12) grams per mu can be sprayed with 15 kg of water every 7 to 10 days, twice in a row.

4. management of stem and leaf decline and root expansion stage.

After the middle and late August, in the late growth stage of sweet potato, the stem and leaf grew slowly to stagnate; nutrients were transported to the root tuber, and the growth center was transferred from aboveground to underground. In management, the stem and leaf should be protected to maintain normal physiological function and promote the root tuber to expand rapidly. Management measures to ensure that the soil water content is 60% to 70% of the maximum capacity in the field. If the weather is dry for a long time and the soil is dry, the premature senescence of stems and leaves will affect the formation and accumulation of carbohydrates, resulting in a reduction in yield, so it is necessary to water small water in time. However, it is not suitable to water sweet potato within 20 days before harvest and planing. In case of autumn waterlogging, it is necessary to drain in time to prevent hard heart and rot. Sweet potato leaves enter the transplanting period before and after the End of Heat. In order to prevent premature senescence, prolong and enhance photosynthesis in leaves, and promote the hypertrophy of potato lumps, foliar fertilizer was sprayed with 30 kg of potassium dihydrogen phosphate to 40 kg of water and 800 times of new high-fat film every 15 days. if combined with the use of expander, the effect is better.

5. Take off the top

When the main stem of sweet potato grows to 50 cm, pick the terminal bud in fine weather in the morning, and continue to remove the terminal bud when the branch grows to 35 cm. This method can inhibit stem growth, avoid nutrient consumption, promote root block expansion, and increase yield by 20% to 30%.

6. Crack irrigation

When the sweet potato enters the root expansion stage, cracks will appear in the surface soil layer. At this time, 750 to 1000 kilograms of clear water manure per mu, 500 grams of potassium dihydrogen phosphate (can also use 5 kilograms of calcium superphosphate and 50 kilograms of plant ash, respectively soaked and filtered with water), mixed in manure, irrigated along the cracks in the morning or evening, filling the cracks with soil after irrigation, and spraying Diguo Zhuangtieling to prevent deformities and cracking fruits, the yield can be increased by 20% and 30%.

III. Harvest in time

The root tuber of sweet potato is asexual, and there is no obvious maturity standard and harvest time, but the time of harvest is closely related to the yield, seed retention, storage, processing and utilization of sweet potato and crop rotation. Early harvest will reduce the yield, and the harvest party will be affected by low temperature and cold injury. The harvest time of sweet potato usually begins to harvest when the temperature drops to 15 ℃. When the air temperature is above 10 ℃ or the ground temperature is above 12 ℃, the planing is finished before the dry frost, and generally before and after Cold Dew.