Application of Biogas Fertilizer on Vegetables in Six Methods
January 19 10:21:48, 2021
Soaking with biogas slurry: Biogas slurry can increase the seed germination rate, promote rooting, and improve the resistance of the seedlings. Specific operations are as follows: Vegetable Seeds Before soaking, the seeds are dried thoroughly, then the seeds are put into a good permeability gauze bag, and after the bags are tightly closed, they are put into a natural growth pool that has been used for more than 50 days and diluted 10 times. in. Formulated nutritious soil: The biogas residue has comprehensive nutrition and can be fully used for the preparation of nutritious soil for vegetable nursery. For the preparation of nutritious soil with biogas residue, the biogas residue with good maturity and fine texture should be used. The amount of biogas residues should occupy 20-30% of the total amount of the mixture, and then incorporate 50-60% of Daetu soil and 5-10% of sawdust. 0.1-0.2% of urea and potassium dihydrogen phosphate can be. The nutrient soil seedlings formulated with the biogas residue can effectively prevent and cure vegetable blight, blight and damping-off diseases and can also control underground pests. Biogas residue as base fertilizer: biogas fertilizer is divided into upper and middle 3 layers, and the bottom layer is biogas residue fertilizer, containing nitrogen, organic matter, humic acid substances and available phosphorus, potassium and other trace elements after mineralization. It is a good vegetable crop. Base fertilizer. Biogas slurry is used as top dressing: the upper liquid in biogas fertilizer is liquid fertilizer with high nitrogen content, which is easy to absorb and use for vegetable crops. It is suitable for top-dressing; the middle layer of biogas fertilizer is paste, with rich available nitrogen, phosphorus and organic matter. Humus, with high fertility, are suitable for top-dressing in the mid-growth of vegetable crops. Usually combined with irrigation, direct application of biogas slurry to furrows or ridges, the effect will be better. Biogas slurry foliar spray: The enrichment of ionic nutrients in the biogas slurry is used for foliar spraying of vegetables, which has high utilization rate and can timely supply the nutrients for vegetable growth. Foliar spraying should use aerobic treatment for 1 day and filter the precipitated biogas slurry, using a reasonable concentration ratio. When the vegetable seedlings are sprayed with biogas slurry, they should be diluted 10-20 times. In the middle and later stages, the foliar spray should be diluted 5-10 times. Generally, the biogas slurry is 45-50 kilograms per mu of vegetables. It is usually sprayed after the dew is dry in the morning and sprayed in the evening in the summer. It should not be applied at noon or in the rain. Do not apply biogas fertilizer 1 week before the vegetables are on the market. Biogas Fertilization with Carbon Dioxide: Combustion of biogas in greenhouses can provide carbon dioxide for vegetables, thereby increasing crop yields and quality. In greenhouse vegetable production, the application of carbon dioxide in the early stage of vegetable production is better, and the application concentration should be determined according to the type of vegetables, light intensity and greenhouse temperature. Vegetables such as cucumbers, tomatoes, celery, and legumes need to have higher concentrations of carbon dioxide during vegetative growth. Higher concentrations of carbon dioxide should be used when there is strong light, high temperatures, and large leaf area coefficients. Conversely, lower concentrations are used.