High-yielding cultivation techniques of cassava in spring

First, dig deeply to improve the soil. A month before planting cassava, turn the soil over and whiten the soil to make the soil fully weathered. When planting, 250 kilograms of phosphate fertilizer composting with livestock manure was applied per mu as base fertilizer. Second, select improved varieties. Varieties with more tubers, less toxicity and high yield must be selected. And select the stem thick node dense, disease-free, no damage to the middle and lower part of the stem as seed stem. Third, seedling treatment. Before planting, intercept 33 cm long seedlings, cut the lower end of the oblique mouth 3mi 6cm, in the shape of a duck bill. On both sides of the seed stem above the oblique mouth, the bark of the seed is cut every 2 nodes, and the cambium is cut off at 2-3 places. The width of the incision is 4 to 1 of the perimeter of the stem, and the length is 2 cm, which can make the oblique and detached cambium have more tubers. When planting, the method of controlling the growth of axillary buds was adopted, except for the axillary buds with three nodes at the top of the seed stem, the axillary buds in the other nodes were removed and inserted obliquely into horizontal ones, which could control the growth of an ideal and robust main culm plant. After planting, when the seedlings grow to 12ml 15cm, the first fertilization can be applied with 30 piculs of dilute dung water per mu. In addition to the proper application under the root of the seedling, it should be mainly applied around about 40 cm from the seedling to promote more rooting and fast extension. When the potato seedlings grow to 50 cm, the second fertilizer is applied, and the potato roots are spread along the topsoil tillage layer by applying fertilizer around 50 cm from the plant and 10 kg of urea is mixed with high-quality dung water 40 / 50 / 10 kg / mu. When the potato seedlings grow to 70 Mel 100 cm, choose to top at noon on a sunny day and remove 3 Mel 5 cm from the growing point. Then it was drenched with 60 piculs of manure and 12 kilograms of urea per mu to make it grow more branches. Fifth, loosen the soil and apply heavy fertilizer in autumn. After autumn, choose a sunny day, peel off the soil on one side of the base with a sharp hoe (be careful not to damage the root tuber) to expose the root tuber, let the soil be exposed for 5 hours, then mix 30 kg of ammonium bicarbonate with 100 kg of phosphate fertilizer for 12 hours, sprinkle it into the base of cassava, and then cultivate the soil. In this way, cassava can not shed leaves in late autumn, prolong the growth period, make cassava grow fast and long, smooth skin, good quality and high yield.