1, selection of land: benefits selected sandy loam. Loam, loquat and clay soils should not be planted. Plowing depth should be about 30 cm.
2. Fertilizer: The principle is to use phosphorus and potash fertilizer as the main principle, supplemented by nitrogen fertilizer. It is recommended to use 1000-2000 kg of farmyard fertilizer per mu, 100 kg of organic compound fertilizer (including organic fertilizer such as soybean meal), and 5-10 kg of potassium sulfate. When used centrally, it can effectively control underground pests.
3. Select seedlings: Select strong, disease-free seedlings of seedlings, seedlings about 15 cm long.
4, planting specifications: single ridge before planting, ridge for ridge distance 80 cm, ridge height 20 cm -30 cm fat ridge. The plant spacing is determined by the geology. In the mountainous land, 2800 plants are planted in 3,000 acres, and the plant spacing is from 28 cm to 30 cm, and the planted land is 2500-2800 planted in flat land, with a plant spacing of 30 cm-33 cm.
5, sowing date: Spring potatoes from late April to late May is appropriate, summer potato (mushroom) can be delayed until mid-July. Cuttings in various places should be planted in due time, and production increases in different degrees.
6. Planting methods: Directly inserting method, the seedlings are deeply inserted into the vertical ground, and the seedlings expose 2 cm to 3 cm on the surface. This method has few single plants, but the potato mass is large and the yield is high. The “farmed seedlings for deep planting and shallow potato planting†of the farmland should be done in order to enlarge the nest and water the feet (a solution of avermectin in water) to extend the water consumption time and seal the nest.
7, weed control: for the provincial workers and improve the weeding effect, sweet potato planting, spraying acetochlor herbicide, 150 ml per mu, watered 75 kg, even spraying and try to avoid seedlings.
8. Field Management: Field management is divided into pre-, mid- and late periods.
8.1. Pre-stage: The sweet potato is grown in the pre-growth stage from the planting to the mulching. The early stage is mainly to promote growth, conditional can spray 0.3% potassium dihydrogen phosphate solution in the mild seedling stage. When the spring drought is severe and there are irrigation conditions, watering can be done in time from late May to mid-June, and watering should be done in a timely manner: Slow irrigation with fine water, but no water in half ditch, to prevent excessive water volume from causing soil compaction and ground temperature dramatically drop. If there is a tiger, it can be sprayed with avermectin pesticides.
8.2. Mid-term: Sweet potatoes are mid-season from ridge closure to reclamation. The period of high-yield fields is dominated by controlling the growth of stems and leaves, promoting the rapid expansion of tuberous roots; generally, fields need to promote the growth of stems and leaves, but also to promote root expansion. Field management should prevent flooding in a timely manner. The stems and leaves have the possibility of being leggy, and they must be promptly provided with vine-preventing measures. When a length of 1 meter is stretched, an appropriate amount of acetochlor solution can be sprayed. For non-grainy fields, the stems and leaves must not be overturned.
8.3. Late: Refers to sweet potatoes from back to harvest. This period of management is mainly to prevent premature aging stems and leaves, extend the life of the leaves, maintain appropriate green leaf area, improve the photosynthetic efficiency of the leaves, and promote stem and leaf nutrient transfer and accumulation in the roots of the block. The main measures can be top-dressing: leaf yellowing faster can spray 0.3% urea solution; on the ground more prosperous, can spray 0.3% potassium dihydrogen phosphate solution. After August, the weather should be properly watered and it should be drained in time if it is damaged.
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