In recent years, tobacco farmers in Henan, Shandong, and other tobacco-growing areas have interplanted sweet potatoes in tobacco land and processed sweet potatoes into starch, vermicelli, vermicelli, etc. The benefit has increased by 1 to 2 times. First, the advantages of tobacco and potato interplanting 1. High economic efficiency. The three-dimensional planting of tobacco can fully utilize land and climate resources. Due to the flat planting of tobacco, it can only be planted once a year. The utilization time of land, light energy and space is four months, and there are eight months when it can not be used and idle, leaving precious land and light resources wasted. Using three-dimensional planting of tobacco, not only tobacco income, but also a variety of food more than one quarter, due to the three-dimensional planting of tobacco planting more than flat tobacco, the efficiency is good, the enthusiasm of farmers to grow tobacco. 2. It can solve the contradiction between heavy tobacco leaves. “Smoke is not heavyâ€, that is, the tobacco fields that were harvested in the same year. You cannot grow tobacco the next year. You must wait at least 3 years before replanting. Otherwise, lighter people will reduce the quality and output of tobacco leaves, resulting in serious losses resulting in certain difficulties for the establishment of tobacco leaf bases and efficient leaf demonstration areas. After the three-dimensional planting of tobacco plants, the root colonies that remain in the soil from the tobacco leaves can be suppressed by the sweet potato, which can greatly reduce the occurrence of tobacco leaf diseases and enable the tobacco leaves to be planted in a field year after year. Second, the key cultivation techniques of tobacco and potato intercropping are both hi light, thermophilic, and hi potassium crops. The interplanting of the two is easy to produce the dispute between light, heat, and fertilizer. Therefore, the management strategy is to ensure the high quality and high yield of tobacco leaf first, followed by the high yield and quality of sweet potato. 1. Deepen the plough layer, increase the amount of fertilizer, and apply potassium fertilizer. The root system of tobacco is huge, and the amount of potassium needed is large. Therefore, it is necessary to deepen the plough layer and plunge about 30 centimeters deep in winter. Increase the amount of fertilizer, under normal circumstances, on the basis of the single fertilizer index of tobacco, and then increase a certain amount of fertilizer, the first concentration of 3,000 kg of high-quality crude fertilizer, 40 kg of special fertilizer for tobacco leaf, and then additional sweet potato fertilizer 30 ~ 40 kg or about 15 kg of potassium sulfate, 30 kg of superphosphate. 2. High ridge cultivation, mulching. Tobacco mulching cultivation with high ridges is not only conducive to the early occurrence of tobacco leaves, but also is very beneficial to the expansion of sweet potato roots and drainage in the rainy season. The ridge distance is about 1 meter, the ridge height is about 30 centimeters, and the ridge width is about 60 centimeters. 3. Strictly control the transplanting time of sweet potatoes. Under normal circumstances, 30 to 40 days after transplanting tobacco (15 to 25 May) is the best time for planting sweet potato. Otherwise, planting too early to compete with the tobacco nutrients, too late, first, the short sweet potato growth period and reduced production, the second is the delay of the sweet potato fertilizer required to delay the loss of maturity of the tobacco leaves to reduce fertility, control the role of late maturity of lust. 4. Use the best sweet potato seeding mode. Sweet potato was selected from medium and short vines, high yield and high quality varieties; tobacco leaves were selected for dwarf, early maturity, drought resistance and disease resistance; tobacco leaves were planted in the middle of a ridge in each row of ridges with a plant spacing of 50 cm and 1330 plants per acre. The sweet potato was planted on both sides of the ridge and in the middle of the tobacco plant. The smoke was triangular and the plant spacing was the same as that of tobacco, with 2660 plants per acre. Some sweet potato in the tobacco planted in the tobacco leaves, so that although the sweet potato tuber is larger, but the sweet potato density is too low, the result is not high yield. 5. Timely topping. Sweet potato vines grow to 30 cm long when the removal of the heart (unfolded leaves), until the branch grows to about 50 cm, hit the top of the group (splendid branches do not expand the leaves). The second is to catch fertilizer early. Sweet potato growth during the branching period is too slow, you can apply a small amount of available nitrogen fertilizer, but not excessive, late. The third is appropriate control. When the sweet potato is ridged and covered, if the stems and leaves grow vigorously, the leaves are dark green, the petiole is too long (more than 2 times the width of the leaves), and the shoot tip is excessively elongated, it should be controlled with 75 grams of 50% paclobutrazol per mu and 50 kg of water. Foliar spraying of sweet potatoes, but to strictly control the spraying of tobacco plants, every 7 to 10 days before spraying again. Fourth, pay attention to pest control, drought prevention, and drainage work in the middle and late stages. 6627 7 troops
Size
Because of different growing environment and conditions of itself, the fruit will be different types of shapes and sizes, usually we deliver the size 220/280/320/350 and so on, but can also supply other sizes.
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