High summer temperatures, dry weather, and reasonable maintenance of the biogas digesters can prevent or reduce problems in the biogas digesters and help extend the useful life of the plants. Attention should be paid to the following issues in terms of maintenance: Preventing exposure to empty pools Some places are used to removing large amounts of residue or residue from late rice before it is used as late rice fertilizer. If you do not pay attention to feeding in time, the digester will be empty and vulnerable to high temperature exposure. Therefore, it is not advisable to carry out large refueling during the high temperature and dry periods. If it is really necessary to refuel and take fertilizers, new fermentation raw materials and fashion materials must be prepared before the large refueling to shorten the empty pool time. If there is insufficient material allocation, then it must be Do not empty the biogas digester. Care should be taken to seal it and prevent it from being exposed to the sun. Biogas refueling is best carried out in the spring or in the fall. In the first half of the year, except in the April-May period, the southern region can prepare raw materials. In the second half of the year, raw materials should be prepared in September. Feeding should be conducted in October. Feeding should be carried out in the afternoon and should be on the same day. Complete the feeding and sealing of the pool to minimize exposure time. Do a good job of moisture conservation and conservation The rural biogas pools are generally built with cement. Cement is a kind of porous building material. In high-temperature dry weather, it will make the pores open, which will easily cause leakage of the pool wall. Therefore, we must pay attention to the long-term maintenance of the biogas digester to prevent the opening of the cement wall of the tank wall, and even burst. Therefore, in some places when constructing a biogas digester, the top is covered with a layer of about 25-30 centimeters, and some crops are planted on it, which is beneficial to keeping the pool moist and prolongs the service life of the digester. In order to prevent evaporation of water in the top of the digester pool in summer, the qualified users can also apply a layer of triadic soil (lime + yellow mud + sand) to the top of the digester pool, brush a layer of tar, spread a layer of coarse sand or coal residue, and then apply a Layer three soil. It is also possible to lay a layer of waste film on the top of the tank to prevent evaporation of moisture and protect it from moisture. Maintenance measures should be taken to safeguard Some users use the biogas digester for many years, combined with summer slag fertilization, the implementation of the tank body overhaul. A few years after the use of the biogas digester, some of the materials used for the masonry wall or the stuccoed cement will fall off, which will lead to water leakage and air leakage. If the wall of the pool is cleaned at this time, some sealing materials such as cement slurry can be brushed to improve the sealing performance. , But must pay attention to open the movable cover, pull out the gas pipe, so that the feed inlet, discharge port, air duct vent, or use a blower to blow the air in the pool, replace the pool of air. The staff under the pool should be tied with safety ropes and special care should be provided outside the pool. Third, sowing cover film corn mulching cultivation can be compared with open ground cultivation 10-15 days earlier. Choose seedless, non-invasive, plump seeds for sowing, with double rows per row, spacing 50-60 cm, plant spacing 25-30 cm, sowing 2-3 capsules per hole and then filling the holes. After sowing conditional chemical herbicides such as butachlor can be sprayed evenly on the surface, and then the plastic film can be laid flat on the ground, covered with fine soil around it, so as to achieve the effect of heat preservation, fertilizer conservation, and weed control. Fourth, field management 1. Put the seedling film in time: When the first leaf of the seedling is developed, put a 5-7 cm square hole in the plastic film at the seedling to put the seedling film, and then seal the film mouth with fine soil. . 2, timely check seedlings to fill the gap: after the seedlings, seedlings should be checked in a timely manner to fill the gap, find the lack of seedlings, seedlings can be used in advance nursery bags or seedlings nursery bags to ensure that seedling growth consistent. 3, appropriate time seedlings Dingmiao: Corn cultivation should stay single seedlings. Marrowlings should be early, can be carried out in the 3-leaf period, leaving 2 seedlings per hole. Dingling can be carried out in the 5-leaf stage, and the method of weakening and retaining the strength of the seedlings should be adopted, leaving 1 seedling per hole. 4, top dressing: The focus is to top-dressing panicle fertilizer, can be broken between the rows top dressing, after fertilization will be covered with fine soil membrane. At the same time, the ear can be used to apply fertilizer when silking, and it is best to use extra-root fertilizer to apply fertilizer. Each time, use 0.2% potassium dihydrogen phosphate to spray the leaves and spray 2-3 times successively. 5. Drought-proof drainage: Corn film cultivation, in the event of drought, can be drained from the sewer irrigation after the ramming of the soil, and rainy weather should clear the drainage ditch in time to exclude waterlogging. Maize heading and flowering are most sensitive to water requirements, and field capacity should be maintained at 70%-80% to achieve high yields. 6. Pest control: Focus on the prevention and control of corn borer, aphids and leaf spot. Prevention of corn borer, can be used in the large bell mouth with 3% Mi Leer 750-1000 grams of mixed soil sprinkled in the heart of the leaves, the head can be used 800-1000 times the dichlorvos droplet irrigation silk; locust 40% available dimethoate 1000 Double liquid spray control; large spot and blight can be controlled by 90% mancozeb 1000 times spray. It is prohibited to use pesticides with long residual effect such as Bataan and Dimethoate after heading, so as to ensure the quality and food safety of the green oysters. 5. Timely harvesting and recovery of residual film sweet corn should be harvested 20-25 days after pollination. Normal corn can be harvested at the ripening stage where the temporal lobe turns white and the grain hardens. After corn is harvested, it is necessary to recover the remaining film in time to reduce the impact on the crops and environment in the later seasons. Ningbo DOKEE Medical Technology Co., Ltd. , https://www.dokeemedical.com