Sweet potato cultivation methods include straight insertion, oblique insertion, horizontal insertion, fishing hook insertion, bottom inserting, and improved horizontal insertion. The planting method has a direct effect on the rooting survival of potato seedlings, the formation and expansion of potato tubers. The main reason is that the temperature, humidity and gas conditions of different soil layers in the yam are different, generally 8 to 10 cm deep from the topsoil. It is most suitable for potato formation. In this range, the temperature, air and moisture of the soil are relatively coordinated, and the temperature difference between day and night is large, which is beneficial to the formation and expansion of the roots. Therefore, under the premise of ensuring survival, it is necessary to plant as much as possible, so that all the sections of the potato seedlings are in the soil layer with loose soil, good ventilation and large temperature difference between day and night. The most widely used method in Guangdong is the oblique interpolation method, followed by horizontal interpolation (including improved horizontal interpolation) and direct interpolation.
1, oblique insertion method.
The number of potato seedlings is 3 to 4, which is deep and shallow. The number of potatoes per plant is moderate, generally more than straight insertion, less than horizontal shallow insertion, and the upper node potato is larger than the lower node. The oblique insertion method of potato seedlings has strong adaptability to adverse environmental conditions, especially the survival rate of drought-resistant seedlings is higher than that of horizontal shallow insertion, and it is easy to plant, save labor, and the yield is relatively stable. With other measures, it is still available. Large area and high yield.
2, horizontal interpolation (including improved horizontal insertion).
The potato seedlings are placed in 4 to 5 sections of the soil, and they are distributed about 5 cm away from the ramen. The nodes are suitable for potato, and the number of potatoes is large, and the size of the potato is relatively uniform. After planting, the water is protected by seedlings. After growing, it grows rapidly, early branching, early potato, and the potato pieces are swollen fast. Because it is more labor-intensive when planting, this method is generally used when high-yield potato fields are used.
3, direct insertion method.
The potato seedlings are inserted deep into the soil layer, and only one or two nodes are distributed in the soil layer suitable for potato formation. Therefore, the number of potatoes per plant is generally small, and the potato chips are concentrated in the upper node. This method of planting is mostly suitable for drought-free and non-irrigated conditions, which is conducive to drought-resistant, sturdy and sturdy seedling survival, and stable yield.
No matter what method is used for planting, it is necessary to keep the soil moist for 3 to 5 days after planting, to ensure survival, and to achieve the purpose of Miaoquan, Miaoqi and Miaozhuang.
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