1, selection Try to choose a loam soil with deep, loose soil, well-drained, organic-rich soil. Should not choose soil viscosity, low waterlogging, poor fertility of the land. The best choice is corn borer, followed by soybean meal. It must be a herbicide land that has not been used for a long period of time such as chlorimuron-ethyl, Pusit, atrazine, etc. for 2 years. No matter which kind of cornice you choose, you must smash or shave the front rake after the autumn crop is harvested and remove it from the field. Use high-quality organic fertilizer 45t/hm2, use large machinery deep and deep 40cm or more, and then turn plough preparation from the large 85cm Ridge, and shaping standby. 2. Seed preparation Varieties Zhongshu 5 and Yanshu 4 were selected. Choose a healthy, virus-free seed potato with the characteristics of the variety. And take the principle of seed potato transfer. Prepare seedlings 1875-2250 kg/hm2. 3, seed potato selection and processing In early April, after planting the potatoes, they were selected one by one, and the diseased potatoes, frozen potatoes and sweet potatoes were removed. The healthy seed potatoes were moved to a warm room to break the dormancy and achieve the goal of quick and neat seedling emergence. The first is the "difficulty" treatment. The seed potatoes are piled in a room with a thickness of 50 cm above a temperature of 10° C. The sacks are laid on the underside of the potatoes and covered with straw mats or mats. When the potato sprouts grow to 0.5~1.0 cm, the seeds are dried. The second is drying. When the temperature is high and sunlight is abundant at noon, seed potatoes are planted on the sunny side of the sun for drying. The thickness is 10-20 cm. The effect is to kill germs, increase resistance, and accelerate germination. This section must strengthen management to avoid biting and freezing of livestock. The general drying time is about 5 days. On April 25-30, when the local temperature stability reaches 8-12 °C, the surface is thawed more than 30 cm, and it can be planted. Combined with further selection of cutting chips, the diseased potato and frozen potato are firmly removed. 4, fertilizer selection and application (1) Selection and application of organic fertilizer Organic fertilizer is the best fertilizer in potato cultivation. It can not only improve the physical properties of the soil, but also provide full price nutrients and beneficial microorganisms for the growth of potatoes. There are many types of organic fertilizers, such as human and animal manure, straw compost, grass and wood ash, and various organic manures, etc. The amount is 45t/hm2, combined with one-time application to the ridge body. (2) Selection and application of chemical fertilizers Based on the application of organic fertilizers, supplementing chemical fertilizers is very important for the growth of potatoes. In principle, it is necessary to strictly follow the soil testing and formulating fertilization plan, and determine the type and quantity of supplemental fertilizers according to the lack of supplementation and lack of supplements. Under normal circumstances: application of 45% potato special fertilizer (14-16-15) 600 kg/hm2, can also be applied diammonium phosphate 180 ~ 225 kg/hm2, high nitrogen compound fertilizer 75 kg/hm2, 50% potassium sulfate 105 ~ 120 kg/hm2. Mixing sowing is evenly applied between the seeding blocks or laterally below. 5, planting Before and after the planting time on May 1st, the tillage layer can be sown at 8 to 12 °C. The sowing method is to use a potato planter, fertilize, sow and cover soil to complete one-off, so as to ensure the quality of protection. The planting density should be determined according to the characteristics of the cultivars. In principle, early-maturing varieties should be maintained at about 63,000 plants/hm2, and medium-late-maturing plants should be about 60,000 plants/hm2. The depth of sowing is 8~10 cm. After sowing, see the lyrics for repression on the same day or suppression on the next day. 6, field management (1) Weeding One is to close the grass. After planting seedlings, metolachlor EC and oxathione were used to dispense the liquids evenly and evenly sprayed on the ridges, which effectively prevented annual weeds and part of annual broadleaf weeds. The second is post-emergence weeding. Post-emergence weeding can use acridine, high-efficiency herb, hard-grass herb, or emperor potato and other herbicides to control grass weeds. Different pesticides should be used strictly in accordance with the instructions. (2) Cultivated Combined with chemical weeding, we should do a good job of artificially controlling broad-leaved weeds and cultivators such as cultivators. For the first time, more than 90% of potato emerged, it was necessary to dig deeper, mainly to increase the temperature of weeding; the second time in the period of plant development, the fine spade shovel was used to eliminate weeds; the third was in the potato. In the early flowering period, shallow shovels should be used so as not to hurt the stem borer. (3) Fertilization Combined high-nitrogen compound fertilizer 150 ~ 225 kg/hm2, potassium sulfate 75 kg/hm2. Combined with spraying potassium dihydrogen phosphate once at the initial stage of potato flowering; initial stage of potato expansion (flowering period). Swelling prime 1 times. 7. Pest control (1) Early blight and late blight First use 58% metalaxyl manganese zinc 120 g seed dressing 50 kg, combined with the use of green agricultural biological fertilizer; followed by the addition of nitrogen fertilizer on the basis of the use of fungicides to achieve disease treatment, disease prevention, selection Silver mana, mancozeb, DuPont gem, manganese fluoride, etc., according to different content according to the instructions. The initial spraying was carried out in the group of trees, spraying once every 7-10 days, and spraying more than 10 times during the whole growing period. In the event of disease, remove the central diseased plant immediately and clear it out of the field, and spray the corresponding bactericide in time. At the same time as spraying fungicide, it can be mixed with part of foliar fertilizer and insecticide to reduce the workload. However, it should be noted that each of the fungicides cannot be used continuously and must be used alternately to prevent the generation of drug resistance by pathogens. (2) Insect pests The main insect pests of potato are 28 ladybugs and aphids. Twenty-eight star ladybirds eat potato leaves. Aphids not only suck the nutrient sap of potato leaves, but their secretions also affect photosynthesis. In addition, locusts can rapidly spread viral diseases and reduce the yield and quality of potatoes. Therefore, prevention must be carried out. In early July, the occurrence of insect pests in the field was closely observed. Once it had occurred and met the prevention and control targets, it was necessary to carry out chemical control, that is, spraying pesticides. The adult insects are applied until the larval hatching period and the larvae are eliminated before they are dispersed. Chemicals may be selected from organophosphorus insecticides such as 50% phoxim EC 1 000 times, or pyrethroid insecticides such as 20% fenvalerate EC, and organophosphorus and pyrethroids may also be used, eg 10 % Chrysanthemum Emulsion 3 000 times, the above drugs should be alternately sprayed 1 or 2 times. The control of aphids can be controlled with 70% imidacloprid water dispersible granules 7500 times, or 5% avermectin EC 1200 times. 8, cut and harvest for sale About 10 days before harvest, the potato plants were cut with a guillotine or a threshing machine and cleaned out of the field. The advantage is that it not only can dry the surface soil, loosen the soil and facilitate harvesting, but also can stop the infection of the late blight pathogen to the tuber and increase the yield and quality of the potato. In mid-September, potato tuber enlargement will enter the mature period. At this time, it can be gradually sold according to market demand. It must be fully collected before the initial frost. Fibersol Fiber,Dietary Fiber,Bar Ingredients Shandong Bailong Chuangyuan Bio-tech Co.,Ltd. Qingdao Branch , https://www.qdblcycn.com