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1. The cultivation techniques for the establishment of Nanyou Fruits and Vegetables Planting in Jianye Jianyou are carried out through the combination of open-air and shed compound membranes. The entire growth period is divided into open-air cultivation management and protected land cultivation management, ie, from the beginning of October to the second year of each year. At the beginning of May, the cultivation and management of the local conventional winter-warm greenhouses is a protected land cultivation and management; at other times, it can be grown in the open air after the film is removed, and it is an open-air cultivation management. Planting time is from February to March each year. Planting spacing is 32 meters, 111 acres planted, take a ditch or dig planting hole, and deep-turn 60 cm; followed by high-quality soil fertilizer or circulatory fertilizer, generally Mushi 5000 kg, 100 kg mixed compound fertilizer. After planting, it should be fully watered and covered with plastic film. Second, fertilizer and water management planting The year should strengthen the shed indoor soil and water management. Grapefruit can be top-dressed one month after planting, and then top-dressing once every 1.5 to 2 months. Each time, topdressing 0.1–0.3 kg of urea or compound fertilizer is applied. The ageing grapefruit should be fertilized 3 to 5 times a year, ie a primary basal fertilizer and multiple top dressings. Basal fertilizer is generally applied after fruit harvesting. Each plant can be applied with 30-50 kg of organic fertilizer and 0.5-1 kg of calcium, magnesium and phosphorus. This application should account for 60% of the total annual fertilization. Protecting fruit fertilizer is applied from June to July, accounting for 10% of the whole year, and increasing the amount of phosphorus and potassium fertilizer. Flowering fertilizer was applied from September to October, accounting for 20% of the whole year. It was applied with NPK. Strong fruit fertilizer was applied from December to January of the second year, accounting for 10% of the whole year, and was dominated by potash fertilizer. Application methods in addition to the normal soil fertilization, but also pay attention to with multiple root dressing. Special attention should be paid to spray 400 times borax solution during flowering to promote pollination and fertilization and increase fruit setting rate. Spraying 0.3% urea and 0.2% potassium dihydrogen phosphate in young fruit can reduce fruit drop and promote fruit enlargement. During flower bud differentiation, spraying 0.2% potassium dihydrogen phosphate solution can promote nutrient conversion and make flower buds plump and full. Watering should be synchronized with fertilization. Grapefruit likes the moist environment, should maintain the relative moisture content of the soil in 60% - 80%, should master a small amount of times when irrigation. Third, pruning mainly uses natural open-shape or "V"-shaped pruning. The height of drying is generally about 50 cm, the number of main branches is 2-3, and the lateral branches are left in the dislocation distribution on both sides of the main branch, and are horizontal or curved. During pruning, different pruning methods such as short cutting, slow release, thinning, and retraction are adopted, so that the new branch can achieve the purpose of the result. In addition, fruiting branches should be renewed after the fruit is harvested. This promotes early plant flowering and lays the foundation for the next year's high yield. IV. Regulation of Temperature and Humidity Each year from the beginning of October to the beginning of the second year of May, it is artificially controlled to grow under the conditions of the greenhouse. It can be grown under open air conditions at other times. Therefore, it is essential that the temperature and humidity control under the cultivation conditions is reasonable. The temperature and humidity control of pomelo fruit moving northwards is: the fruit's daytime temperature is 28-32°C, nighttime is 10-15°C, relative humidity is 60%-80%, fruit's near-maturity period is 26-30°C, and nighttime is 8-13. °C, relative humidity 60%-80%; shoot growth during the day 17-22 °C, night> 5 °C, relative humidity <80%; flowering (April) during the day 22-25 °C, night> 12 °C, relative humidity 60 %about. V. Prevention and control of pests and diseases The principle of “prevention as the mainstay and comprehensive prevention and control†is adhered to, and on the basis of strengthening comprehensive management and improving the ability of tree resistance to diseases, biological agents and high-effective and low-residue pesticides shall be reasonably sprayed. In the cultivation observation, the main pests and diseases of grapefruit are powdery mildew, and the second is leaf miner. For powdery mildew, 5 Baume degree lime sulfur was sprayed before germination; 20% of rustin EC 3000 times or 30% of Fu Fu Ling 2000 times was applied during the growing season. For leaf miners, 1.8% of avermectin EC can be sprayed at 3000 times during the occurrence period. Picking and Harvesting Grapefruit is listed on the market from late December to February of next year. The picking period lasts up to 2 months. Its main maturation period is controlled around the Spring Festival. Due to the time-phased picking and picking and picking, the annual output of 1,000 kilograms per mu, 2200 kilograms per year per mu, and 4100 kilograms per year per mu can be achieved. (Shouguang Agricultural Bureau, Shandong 262700)