First, soak the seeds with biogas slurry and soak the seeds thoroughly before drying. Then put them into a gauze bag and tie them tightly. Put them into the biogas slurry that has been used for more than 50 days and diluted 10 times in the biogas digester. In the case of 15-18°C. , melon seeds soaked 2 ~ 4 hours is appropriate, solanaceous seeds soak 4 ~ 6 hours is appropriate. After soaking, remove the seed bag and wash it with clean water. Spread the seeds and wait until the surface of the seeds has dried before germination. Seed soaking in biogas slurry can improve disease resistance, insect resistance and stress resistance.
Second, the use of biogas slurry for disease prevention
1. Select a biogas digester with a gas production period of 30 days or more, and extract the second layer of supernatant below the scum layer from the discharge port. The biogas slurry was filtered and clarified with gauze, and the whole plant was sprayed regularly after the emergence of the vegetables. The concentration should be determined according to the concentration of the feed solution, the growth period and the season. When the feed liquid concentration is 10%, 3 to 4 parts of water per biogas slurry during the seedling and other seasons, and 2 to 3 parts of water for each part during the adult and other seasons. The time is preferably before 10 o'clock in the morning or after 3 o'clock in the afternoon, and it is usually sprayed in 7 to 10 days. Biogas slurry can also be mixed with other pesticides and chemical fertilizers to enhance the nourishing and disease prevention effects.
2. Gully application or irrigating roots The same choice of biogas digesters with gas generation for more than 30 days is used to extract the second layer of supernatant below the scum layer from the discharge port. According to the needs of different vegetables, the characteristics of each fertilizer can be combined with watering along the ditch per acre topdressing 300 ~ 350 kg of biogas slurry. Solanaceous vegetables and melon vegetables can be irrigated with 3 to 4 portions of water for each biogas slurry. About 500 grams of fluid per plant will play a good role in controlling root diseases.
Third, the use of biogas slurry, biogas residue for fertilization
1. The biogas residue was used as base fertilizer for transplanting seedlings of the vegetables, and the base fertilizer was applied with the method of hole application. When transplanting seedlings, per acre is applied with 2000 kg of fermented biogas residue, and the planting hole is mixed with the garden soil excavated by opening a hole to be planted. For vegetables planted on-demand or in large areas, basal fertilizers are generally applied in the method of seeding. For melons, such as pumpkins, melons, cucumbers, tomatoes, etc., generally large-scale large-scale fertilizer method, 3000 kg of bioslag per mu, 35 kg of superphosphate, 100 kg of plant ash and appropriate amount of domestic garbage mixed into the hole, Cover a layer of garden soil about 5 to 10 centimeters thick. Immediately after planting, irrigate water and cover rice straw or straw.
2. Biogas slurry is usually topdressed with two methods of root pouring and foliar spraying. The quantity of biogas slurry poured into the root may be determined according to the variety of vegetables. The general dosage is 500-3000 kg per mu. The fertilization time should be sunny or late in the evening, and it should not be applied when it is raining or when the soil is too wet. The foliar sprayed biogas slurry must be gauze filtered before use. In the period of vegetable young leaves, the biogas slurry should be diluted 1 time with water, and the amount should be between 40 and 50 kilograms. The dew should be dry and dry, and it should be done in the evening in summer, and it should not be sprayed during noon or rain. Leaf vegetables can be fertilized in any growing season of vegetables, and biogas can also be sprayed in conjunction with disease prevention and extermination. The melons can be grown at budding stage, flowering stage and fruit enlargement stage, and 3% of potassium dihydrogen phosphate is added to the biogas slurry.
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