Digestate containing 10% --20% of the humic acids, humic acid substances generated using ammonium bicarbonate solution or aqueous ammonia and humic acids in the molecular structure of the acidic group, may increase the mass of active humic acid, and improve efficiency .
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The method of retting humic acid fertilizer is methane, the biogas digester withdrawn or soil with organic waste composting with a layer of waste (or mud) plus one 20--30 digestate cm thick, piled a compost heap great circle-shaped table, and then cover the surface of the soil and some tapped, retting 15--20 days Serve biogas rot fertilizer. If retting biogas per cubic meter of calcium, magnesium, phosphate, or phosphate rock 20--25 kg into the marsh rot phosphate. The fertilizer is suitable for use as a base fertilizer, and the application amount per acre is 1000 kg.
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According to the experiment of the Beijing Academy of Agricultural Sciences, the biogas rot phosphate fertilizer has a significant effect on increasing yield of wheat, corn, eggplant and green pepper. The yield of corn can be increased by 13.8% , and the yield of green pepper is increased by 15% .
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