Sweet potato planting: what should we pay attention to when planting sweet potato in autumn?

What should we pay attention to when planting sweet potatoes in autumn? Please give guidance on planting sweet potatoes in autumn with reference to the following planting methods: select early-maturing, high-quality and high-yield varieties such as "Sushu 7", "Sushu 8", "Yusu 303", "Xushu 18" and "Yushi 263"; select pointed, flat-headed seedlings with thick and dense culms, moderate old and tender, rich pulp, disease-free, no degradation and no adventitious roots, and different varieties are planted separately. Early planting can prolong the field growth period and improve yield and quality. For example, in eastern Sichuan, the most suitable planting period is from late July to early August. In order to ensure maturity, it must not be postponed until after the Beginning of Autumn. It should be noted that many farmers are used to planting only when it rains after soil preparation, and some even do not plant until late August, which is a pity. Fertilization in light soil or sandy soil fields, open the main ditch, surround ditch and ridge ditch, so that the ditch system is unobstructed, the bottom of the ditch is straight, the rain stops the ditch is dry. The high efficient compound fertilizer 25Mel with N-P-K of 15-8-16 per mu was evenly spread and then leveled and ridged. Planting methods of sweet potato: there are two specifications of high ridge: one is 1.2m wide at the bottom of the ridge, 40cm high, 70cm wide, 3 rows of wrong nests are planted on each ridge with a distance of 33cm, 5000 plants per mu; the other is 1m wide, 33cm high, 60cm wide, double-row staggered nests per ridge, with a distance of 33cm, 4000 plants per mu, 30 cm apart, and 4400 plants per mu. It should also be noted that the density corresponds to the growth habits of the varieties. When planted in a sunny afternoon or cloudy day, choose a strong seedling with a tip that is not affected by drought aging. The seedling is 30ml 40cm long and has 10 unfoliated green leaves. The base of the seedling is preferably equipped with 3 buds of 5mi 10cm long. When planting, first open the nest with a small "gray knife" or "ash razor", and then disk the red mackerel seedlings into a ring shape, and then bury them into the soil with a depth of 10m and 13cm, with 7 nodes of 6m. The part that goes into the soil should be flat, and the cover soil is actually loose, exposing all the leaves and seedling tips, and immediately applying human and animal dung water to stabilize the trees. In case of soil drought, you can first open the pond to irrigate, harvest and then plant; in case of high temperature and strong light, straw can be used to cover day and night for 2-3 days, or only three leaves at the tip of the seedling will be exposed when planting, and the rest of the leaves can be buried in the soil to facilitate the survival of the whole seedling. The main points are: pointed ivy, flat planting, buried leaves and stable trees. Topdressing and raising seedlings of sweet potato: ploughing for 10 days after planting, filling ponds with human and animal manure water 20mur30 to ammonium bicarbonate 10kg or urea 5kg (preferably with 40% high efficiency compound fertilizer 7Mel 10kg); at the same time, 100kg plant ash 100kg / mu mixed with calcium superphosphate 2530kg was applied to the pond, not in the pond (only human and animal manure water was used to lift seedlings with high efficiency compound fertilizer) When rattan leaves seal ridges, 21.8% zinc sulfate 0.5 kg or compound zinc fertilizer 0.8 kg is sprayed with 50 kg water per mu; in the first ten days of October, 100 grams of potassium dihydrogen phosphate, 150 grams of urea and 50 kg water are sprayed 3 times per mu. Click to get more sweet potato planting techniques click to get more vegetable planting techniques