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沼气渣肥是沼气池产生的作物秸杆残渣,它含有较全面的养分和丰富的有机质,其中还有一部分被转化成的腐植酸类物质,是
Biogas residue is biogas generated straw residue, which contains more comprehensive nutrients and rich organic matter, of which some are converted into humic substances, is