Sweet potatoes are highly adaptable crops and their requirements for soil are not strict. However, in order to obtain higher yields and better quality, good soil conditions and farming management measures are still required. Therefore, the selection of sweet potato plots and ridges for soil preparation are also important links in the production of sweet potatoes.
First, the selection of sweet potato plots. Select the sweet potato plot as far as possible with the following conditions: 1, with a certain depth of plough layer, which is a certain amount of living soil. It is generally required that the depth of the plough layer is 25-30 cm or more. Deep plowing is conducive to containment and provides sufficient water, nutrients, and air growth conditions for sweet potato roots. 2, loose soil layer. Soil loosening is conducive to adequate oxygen in the root system and maintains the balance between plant respiration and assimilation photosynthesis. Plant robustness is the key to high yield. At the same time, the absorption capacity of potassium is increased, so that potassium and nitrogen are relatively high, which is conducive to the transport of nutrients to roots. 3, moderate soil fertility. If the fertility is too low, the phenomenon of poor growth of nutrient-deficient plants will occur in the sweet potato. Excessive fertility, especially excessive supply of nitrogen fertilizer, and unbalanced elements will result in the phenomenon that the above-ground part is prosperous and the underground economic output is too low. 4. Many kinds of sweet potato are in dry land, and there are few irrigation conditions. The required water is mainly natural precipitation. Therefore, the soil must have a certain water storage capacity. The sand-excessive land is weak in water and fertilizer, and it is easy to lose too much nutrients and affect the normal growth of sweet potatoes.
Second, sweet potato to do ridge. After the sweet potato plots are selected, they should be scientifically and rationally prepared for ridges. With the addition of organic fertilizers, soil fertility improvement, clay sand mixing, sandy soil mixing, and deep plowing, further improvement in ridges is the key to realizing the increase in production of sweet potatoes. 1, ridge direction. In dry land plots in mountainous and hilly areas, the direction of ridges should be parallel to the contour lines (vertical to the slope direction), that is, they should be made into horizontal ridges so as to ensure that the natural precipitation water is not lost. Flatter, more fluvial plots should be made as flat and large ridges as possible, and low-lying plots should be constructed so as to facilitate drainage. 2, potato ridge specifications. Ridge ridge height 30 cm, ridge width ridge distance 1 meter; small ridge ridge height 25 cm, ridge width ridge distance 75-80 cm, each ridge planted a row.
In short, a reasonable choice of land and scientific ridges is a key link in the production of sweet potatoes.
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