Biogas Fertilizer Preparation Biogas slurry and biogas residue are extracted from biogas digesters after 2 months of normal fermentation. The biogas slurry can be directly irrigated with water, and the biogas residue needs to be piled up for 2 to 3 days before being used. The biogas slurry must be fully filtered through the gauze in order to spray fertilizer, so it is better not to block the nozzle.
Operation method 1. Biogas residue as base fertilizer. After harvesting the fruit, 3000-5000 kg of biogas residue is spread per acre before the soil is frozen, and an appropriate amount of fertilizer may also be mixed. Extending the hole between the rows and deep-swapping, the scaffolding can be applied in the whole garden and then buried in about 20 centimeters; it can also be applied in a way that is 50 centimeters away from the plant, with a ditch depth of 40 to 50 centimeters and a width of 30 to 40 centimeters. After the application, the soil is leveled. 2. Biogas slurry irrigation fertilization. It can be applied 3 to 5 times a year, with a large amount in the medium term. Precipitating Fertilizer: After unearthed in early spring and before sprouting, 1000 kg of biogas slurry per acre is applied in combination with watering irrigation. Flowering fertilizer: About 7 days before flowering, 1000 kg of biogas slurry is applied per acre combined with watering irrigation. Promoting fruit fertilizer: Before the young fruit is enlarged, combine 1500 kg of biogas slurry per mu with irrigation. Inflated big fertilizer: During the swell of berries, 1500 kg of biogas slurry per acre is applied in combination with watering irrigation. Promoting the coloring period: the early stage of berry coloring, combined with watering irrigation application of biogas slurry 1000 kg per mu. 3. Biogas slurry spraying. Before flowering and fruit expansion, the ratio of biogas slurry and water was sprayed in a ratio of 1:2, once every 10 days, and sprayed 3 to 5 times.
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