Use immediately after being released from the pool. The biogas fertilizer has strong reducing ability. If it is applied immediately after it is discharged, it will compete with the crops for oxygen in the soil and affect the germination and root development of the seeds, resulting in the yellowing and withering of the crop leaves. Therefore, the biogas manure comes out of the tank, and generally can be used after being stored in the storage tank for 5-7 days. The biogas residue and the phosphate fertilizer are mixed in a ratio of 10:1 for 5-7 days, and the effect is better.

Second bogey is not directly against the water. Biogas fertilizers are applied directly to the crops without diluting them, especially if they are used to top-up seedlings, which can cause burning of the crops. When the biogas fertilizer is topdressing, it is first mixed with water, and the general amount of water is half of the amount of biogas slurry.

Three bogey top soil applicators. The application of biogas fertilizer to dry land crops should adopt acupuncture and furrows, and cover soil. Apply to the paddy field and spread it evenly on the field surface before planting. Then plow the plow to the ground floor.

Four avoid excessive application. The amount of biogas fertilizer used can not be too large, and generally less than the use of ordinary pig manure. If it is applied in large quantities blindly, it will lead to crop lengthiness and shade between rows, resulting in reduced production.

Five bogey and plant ash, lime and other alkaline fertilizers mixed application. Ashes, limes, etc., have strong alkalinity. Mixing them with biogas fertilizers will cause loss of nitrogen and thus reduce fertilizer efficiency.

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