Cultivation techniques of spring potato-sweet potato + corn-vegetables in the dry land

Since 2000, in the Jingning Dong Autonomous County in the south of Zhejiang, the county has accumulatively planted 1,326 mu (1 mu = 667 square meters) of an efficient cultivation pattern of "spring potato-sweet potato + corn-vegetable" three harvests and four harvests in an area 600 meters above sea level. The same below, has achieved remarkable economic and social benefits. After 4 years of investigation and statistics on 853.5 acres of field plots, the average output value of spring potatoes is 3179.8 yuan per mu, net income is 2512 yuan; the average output value of sweet potato per mu is 4840.5 yuan, net income is 3730.4 yuan; the average output value of corn per mu is 960 yuan, net income 896 yuan; vegetable average output value of 2428 yuan per mu, net income of 2112 yuan, the average annual output value of 11408.3 yuan per mu, net income of 9250.4 yuan, input-output ratio of 1:4.28. The main cultivation techniques of this model are as follows. 1. Potatoes grown as a commodity in spring potato are required to be listed on the market, and it is necessary to promote the coverage of plastic film. Dongnong 303 and Kexin No. 4 shall be selected as the varieties. As a feed, it requires high yields and can be cultivated in the open air. The variety should be selected as Kexin No. 2. Cultivation can be used on double rows of ridges, 25 cm wide, 32 cm spacing, and about 4,000 per acre. Before sowing, each per acre applies 2500kg of corral fertilizer, 20kg of superphosphate, 10kg of potassium chloride or 1000kg of coke ash as base fertilizer, 5kg of urea or 500kg of decomposed human urine after emergence, plus water pouring. To promote early-onset trees, early closure ridge. 2. Cultivation Techniques for Sweet Potatoes and Maize (1) Cultivation Techniques for Sweet Potatoes As the products for processing French fries, potato cakes, etc., the local “60 days” or yellow sweet potato should be used; 56 or "Victory 100." For feed use, it is better to use a variety of fertilizers, high-quality, high-yielding varieties of Zhejiangshu 1 and local white sweet potatoes. In late March, hotbed mulching was used to cover strong seedlings. In late May, potato seedlings were cut and high-ridge cultivation was carried out. Line spacing 70 cm 25 cm, insert 3000 per acre, advocate oblique plug shallow pressure seedlings. In terms of fertilization technology, it is enough to make the base fertilizers, seedlings early, cracks fat, and fertilizers. The dosage per acre is 15 kg of pure nitrogen, 8 kg of phosphorus pentoxide and 15 kg of potassium oxide. In the fertilized materials, the total amount of farmyard manure accounts for 70%. After the survival, timely application of Miao Fei, prompting early-onset seedlings, early sealing ridge. In the middle and late August, when cracks appear in the ridge surface, cracking fertilizers are applied in time to prompt the rapid expansion of the roots. In the later stage of growth, 1~2 times extra-root top dressing is applied to prevent the premature decline of the plants and ensure high yields and harvests. (2) It is better to use Suyu No. 1, Xianjing No. 1 or sweet corn as the selling technique for the cultivation of corn. For the use of feed for the election Danyu 13, Zhejiang Dan 9 is appropriate. If the seedlings are transplanted and planted, about 25 days before the sweet potato cuttings, the seedlings will be sown, and the seedlings will be fed with nutrients to raise the survival rate. This will lay a good foundation for the high yield seedlings. If live broadcasting is used, corn can be sown after sweet potato cuttings. Corn and symbiosis with sweet potato, corn seedlings should be timely early application, field facilities, can be combined with topdressing sweet potato seedlings and application of corn seedling fertilizer, panicle fertilizer is a key top dressing of corn, to be re-applied. Maize seedling management focus is to preserve seedlings, prevent crowded seedlings, grasp fertilizer and water to promote control and balance growth. Attacking panicle fertilizer applies 50 kg ammonium bicarbonate or 25 kg urea per acre. Qiao Shi urea per acre 5 to 8 kg. Corn borer is a major pest in corn fields and it is necessary to do a good job in prevention and control. 3. Vegetable cultivation techniques Vegetables generally use radish, both as vegetables and as feed, in order to select a wide adaptability, high quality and high yield of Zhejiang University long radish is appropriate. After harvesting, sweet potato was applied with 1,500 kg of bar fertilizer and 500 kg of human waste as base fertilizer. About 4,500 holes were sown per acre and 6-8 seeds were sown per hole. After the seedlings, and time seedlings Dingmiao, when the seedlings do weak to stay strong, the first time after the seedlings left 3-4 seedlings per hole, the second seedlings after the seedlings per hole, 2 seedlings, after each time after the seedlings Shi Miaofei 500 kg of human waste. When the root of the tuber grows rapidly, timely application of phosphate fertilizer and potash fertilizer. Drought should be watered to keep the surface moist, timely control of pests and diseases, and pay attention to safe medication.

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