CAJ | 학술논문

对山西省高平市不同沼气肥有机质、养分和重金属含量进行比较分析,结果表明：沼气肥的 pH 值均呈碱性。鸡粪沼液中有机质、全 N、 P、 K 含量均高于猪粪沼液,秸秆沼液中有机质和全 K 含量高于鸡粪和猪粪沼液。沼渣富含有机质,且秸秆沼渣有机质含量均高于猪粪沼渣。猪粪沼渣全 N 含量高于全 P 和全 K,而秸秆沼渣全 K 含量高于全 N 和全 P；两类沼渣中有效 P 含量占全 P 的比重最大。3种沼液的中、微量元素均以 Cl 含量最高,且超过农田灌溉水质标准(GB5084-2005)； Ca 和 Mg 含量次之, Cu 含量最低。6个沼渣的中、微量元素均以 Ca、 Fe 含量较高；3个猪粪沼渣均以 Cl 含量较少,而3个秸秆沼渣均以 Mn、 Cu 含量较低。1号猪粪沼渣 As含量超过有机肥料标准(NY525-2012)。由此可见,部分沼液和沼渣可能存在有害物质过高的问题,从而影响其农用的价值和效果,存在潜在的生态环境风险。同时,应加强相关标准的制定和完善,以确保沼气肥的安全、高效农业利用。
대산서성고평시불동소기비유궤질、양분화중금속함량진행비교분석,결과표명：소기비적 pH 치균정감성。계분소액중유궤질、전 N、 P、 K 함량균고우저분소액,갈간소액중유궤질화전 K 함량고우계분화저분소액。소사부함유궤질,차갈간소사유궤질함량균고우저분소사。저분소사전 N 함량고우전 P 화전 K,이갈간소사전 K 함량고우전 N 화전 P；량류소사중유효 P 함량점전 P 적비중최대。3충소액적중、미량원소균이 Cl 함량최고,차초과농전관개수질표준(GB5084-2005)； Ca 화 Mg 함량차지, Cu 함량최저。6개소사적중、미량원소균이 Ca、 Fe 함량교고；3개저분소사균이 Cl 함량교소,이3개갈간소사균이 Mn、 Cu 함량교저。1호저분소사 As함량초과유궤비료표준(NY525-2012)。유차가견,부분소액화소사가능존재유해물질과고적문제,종이영향기농용적개치화효과,존재잠재적생태배경풍험。동시,응가강상관표준적제정화완선,이학보소기비적안전、고효농업이용。
The nutrient and heavy metal contents of biogas fertilizers from different biogas digester in the Gaoping city of Shanxi province were compared and analyzed. The results indicated that the pH of biogas fertilizers were all alkalinity. The organic matter, total N, total P, and total K contents in biogas slurry of chicken manure were higher than that in biogas slurry of pig manure and the organic matter and total K contents in biogas slurry of straw were higher than that in biogas slurry of chicken ma-nure and pig manure. Biogas residue was rich in organic matter and the organic matter in biogas residue of straw was higher than that in biogas residue of pig manure. The total N was higher than total P and total K in biogas residue of pig manure and the total K was higher than total N and total P in biogas residue of straw. The ratio of available P to total P was the highest in the two kinds of biogas residue. The Cl concentration was the highest among the medium and trace elements and exceeded the farmland irrigation water quality standards (GB 5084 - 2005), then followed by Ca and Mg, and Cu content was lowest in the three kinds of biogas slurry. The Ca and Fe contents were higher among the medium and trace elements in the 6 biogas resi-dues, and the Cl content was lower in the 3 biogas residues of pig manure, but the Mn and Cu contents were lower in the 3 biogas residues of straw. The As content exceed organic fertilizers standards (NY 525 - 2012) in the pig manure biogas resi-due of No. 1. Thus it could be seen that part of biogas slurry and residue might exist excessive harmful substances and that could affect its value and effect of agro - application and there was potential ecological environment risk. At the same time, the formulation and improvement of relevant standards should be strengthened for the safe and efficient agro - application of biogas fertilizer.