1 Cultivated technical measures 1.1 Variety selection Four Nine Dragonflies 1.2 Seedlings retained 1.2.1 White seedlings must be carefully selected four times a year. The first time after the harvest, the primary selection will be conducted in mid-July, and it will be ready. Marking; the second time when the harvest was done in autumn and winter marks; the third time combined with the winter plowing Baitian management timely digging male plants, miscellaneous, gray pupae, male puppet piers and do not meet the characteristics of the characteristics of puppet pier; The fourth time in the spring to dig the seedlings, according to the seedlings, the color of the seedlings is eliminated and the color is particularly tender green. 1.2.2 White seedlings should be selected in the same year with a neat plant shape, high pregnancies, high pterygium hypertrophy, low scab site, no male fleas and ash, and low tiller nodes, and a mature mating seedling. 1.2.3 The growth of alfalfa and white seedlings is not overwhelming. The height of the seedlings is relatively short, the pale yellow-green leaves, and the heights of the leaves of the clasping stems are not much different. However, the last 1-2 leaves are significantly shortened, and each leaf is “white and blueâ€. Focus on tightly. 1.3 Site Conditions The soil is loose and fertile, rich in organic matter, low-lying, with good drainage and irrigation conditions. It requires timely plowing within the year, smashing after the spring, and timely smashing the fields and avoid continuous cropping. 1.4 Applying basal fertilization and reasonable dense planting and culturing. The strong white sucking fertility requires 667m2 of decomposed organic fertilizer 2000-2500kg, ammonium bicarbonate, phosphate fertilizer of 5kg or the corresponding compound fertilizer as the base fertilizer, and 35cm irrigation after soil preparation. Planting seasons for spring and summer are usually planted in spring and summer. They can be planted from the end of March to the beginning of April for summer hoeing, or they can be planted in mid-June to carry out autumn hoe management. The planting density is based on the row spacing of 9060 cm, and every 667 m2 of 1200 mounds, each pier has 4-5 tilling seedlings. 1.5 Field Management 1.5.1 Summer Stork Management After the autumn plover is harvested, the plants enter the off-eye period, and by mid-to-late December, the slush cuts off the dead leaves of the above-ground stubbles, cleans the pastoral land, and destroys them in a concentrated way to reduce the overwintering of insect populations and germs. Base number. Excavate the puppets and ash plant to keep the field flat and moist without cracking. 1.5.1.1 Fertilization 1 Basal fertilizer: After mulching, 667m2 of mulching membrane is used to rot the bar fertilizer or human excrement 1000kg and potassium chloride 15kg. Or quality ternary compound fertilizer 25-30kg, potassium chloride 15kg. 2 dressing: 4-5 times throughout the period. The first time when the seedlings grow 10-20cm, 667m2 high-quality compound fertilizer 20-25kg; every 15-20 days after the second top dressing, 667m2 high quality compound fertilizer 20-25kg, potassium chloride 10kg; after the plant growth as the The strengths and strengths are applied 1-2 times every 10-15 days, each time using 10-15kg compound fertilizer. Stop dressing top dressing about one week before pregnancy, or delay pregnancy or infertility. After 50% of the plants are pregnant and weighed, applying 667m2 of 25-30kg of ammonium bicarbonate and 15kg of superphosphate can promote sturdiness and significantly increase yield. 1.5.1.2 Tianshui Management After applying the basal fertilizer in Putian, it can be filled with water. Except for the slightly higher water level during the pregnancy, the shallow water in other periods promotes tillering and keeps the water level at 3-5cm. 1.5.1.3 Fixed seedlings for thinning seedlings: When the seedling height is 20-30cm, the seedlings will be planted with sparse seedlings. The seedlings with weak seedlings, diseased seedlings, and dense parts will be sparsely sorted. Individual dense seedlings that are too dense may be pressed in the mud. The roots are scattered so that the tillers are spread out. Finally, 14-16 roots of dense and strong seedlings are planted on each pier. 1.5.1.4 Putian: On the one hand, Putian, on the one hand, removes weeds in the field, reduces pest infestation, on the other hand loosens the soil, improves soil permeability, accelerates fertilizer decomposition, and cuts old roots to promote new root germination. It is conducive to the robust growth of plants. Usually in the height of 20-30cm began to paddy fields, once every 7 days, 2-3 times in a row. Tear off the hard blocks. 1.5.1.5 Earthing: The purpose of earthing is to block the direct sunlight on the earthworms and improve the quality and yield of earthworm meat. This is a major innovation in the cultivation measures of the summer hoe in the province of Huangyan. When the pupa plant began to conceive, that is, the stems of the plants became flat and began to inflate at the junction with the water surface. The earth is to be divided into several stages. Each pier sees a strain of a pupa, and it will continue to grow the soil as it continues to expand. The height of earth can not exceed the leaf pillow (eyes). Because of the pregnancies, it is necessary to harvest and cultivate soil. 1.5.2 Qiugao Field Management 1.5.2.1 Fertilization: Normally top dressing three times in the whole period. The first time was a live tree fertilizer, and urea 10kg and compound fertilizer 20kg were applied after planting. The second time was tillering manure, and 667m2 of 667m2 rotted bar fertilizer 750-1000kg or compound fertilizer 30 days after the first fertilization was applied 20 days before the first fertilization, which promoted the early autumn tiller and the underground stems grew robustly, and laid the foundation for the high yield in summer. The third time is pregnant fertilizing manure, which is generally applied at a rate of about 30% at the time of puppet gestation and 667m2 of compound fertilizer at 20-25kg. 1.5.2.2 Putian and stripping leaves: The seedlings will survive for about half a month after colonization, and once after survival, they will be soaked once every 10-15 days before the seal line is closed, and they will be required to reach the fields without weeds. In combination with Putian, yellow leaves, old leaves, and diseased leaves must be stripped in time, and the dried sections should be cut to increase ventilation and light transmission, reduce pests and diseases, and facilitate delivery. Pay attention to make up for shortages in time and make sure you have enough feet. 1.5.2.3 Water slurry management: Keep 3-5cm shallow water in the early stage of delivery, deepen it to more than 10cm in the later period, restrain ineffective delivery, and promote pregnancies. During the gestation period, 15-20cm of deep water is poured to promote the expansion of white peony and improve quality. During the harvest period, keep 3-5cm of shallow water to raise roots. 1.5.2.4 Remove impurities: In the pre-harvest period and harvest period, remove the plants with low sputum, ash and pods. The formed vacancies timely made up some seedlings from other piers. 2 Diseases and pests control 2.1 Disease prevention: The main diseases of loquat white include rust, leaf spot and sheath blight. Its prevention and control measures: 2.1.1 Rational rotation control for agricultural control; control of nitrogen fertilizer application, reasonable application of phosphorus and potassium fertilizers; timely removal of old leaves, yellow leaves, diseased leaves, and concentrated burning. 2.1.2 Chemical control 2.1.2.1 When the seedling height is 10-20cm, use 50% carbendazim WP 600 times solution or 70% mancozeb WP 400 times solution for preventive spray once. 2.1.2.2 In the initial stage of disease, the corresponding agent is sprayed once every 7-10 days and sprayed continuously for 2-3 times. Spraying requires a good atomization effect. It is advisable to condense small drops of water just on the leaf surface without flowing. Pay attention to the use of pesticides during pregnancy and pregnancy. "Rust" can be selected from the following agents: 40% Fuxing Emulsion 8000-10000 times; or 15% Triadimefon WP 1000 times; or 25% Diuretic Oil 3000 times; or 12% Diclazuril 2000 -3000 times liquid. The following agents can be used for "flax spot": 40% of Inopur net 600 times; or 50% of acetaminophen wettable powder 600 times; or 50% of carbendazim wettable powder 600 times. "Sheath blight" can be sprayed with 5% Jinggangmycin aqueous solution 800-1000 times. 2.2 Treasure control: Common pests are common maggots, stem borers, leafhoppers, and white waterflies. Its prevention and control measures: 2.2.1 Agricultural control 2.2.1.1 Before the film is covered in winter, stubbles are cut off for the winter and the fields are cleaned up and burned. To reduce the number of overwhelming insects base. 2.2.1.2 Remove field weeds and field weeds, and pull yellow leaves in time to reduce spawning sites and amounts of pests. 2.2.2 Chemical control 2.2.2.1 After cutting off the wintering stubs and cleaning the garden, immediately spray the roots and the ground with 20% triazophos EC 600 times to reduce the number of overwintering pests. 2.2.2.2 During the egg incubation period, the following agents were used to spray: 20% triazophos EC 600 times; or 27% Gaotu Ke EC 700-1000 times; or 80% Kraft 800-800 times. 3 Harvest 3.1 Summer Harvest: Normally end of May and end of May, harvest time is about one month. When the heart of the pupa plant is shortened, the base expands into a tower shape, and the leaf pillows of the left and right outer leaves of the left and right sides can be harvested when they shrink to the same level. Found that the male fleas, ashes and short-cuts should be promptly removed. Xia Yu 667m2 production up to 2500kg or more. 3.2 Autumn Harvest: Harvesting is generally started in mid-October. After the fattening of the meat, when the leaf sheath is slightly cracked, it must be timely harvested. Qiujiao is a high-grade pregnant pregnancies that cannot be easily harvested in time to age and lose food value. 667m2 production up to 750kg or more. Attachment: The greenhouse cultivation technology points: Through the use of greenhouse precocious cultivation, alfalfa can be harvested in advance by the end of March to early April. The benefit is very good. This is the innovation of Huangyan tenant in our province. The cultivation of double-season white sheds mainly uses bamboo sheds. In the early stage, there was one more management of mulching and temperature increase. Others were cultivated in the same manner as conventional methods. The bamboo sheds are 5.5m wide with pillars in the middle and the length is determined by plots. In the shed, there are 6 rows of 2,400 piers per 667m2. In mid-December, after the planting of the Qingtian field, a shelter film was formed to prevent frost. Usually when the weather is moderate, two ventilation is required; when the weather is fine, the temperature in the shed should exceed 32°C, and the film and two ventilation holes should be removed. In the case of continuous rainy weather, the ventilation should be strengthened to enhance the seedlings and reduce the rate of pregnancy. After the general clearing, all the films were removed. China Agricultural Network Editor