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Chinese Agricultural Science Bulletin ›› 2019, Vol. 35 ›› Issue (14): 94-100.doi: 10.11924/j.issn.1000-6850.casb18040140

Special Issue: 土壤重金属污染 畜牧兽医 园艺

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Application of Pig Manure Affects Growth of Vegetable, Residues of Antibiotics and Heavy Metals in Soil

  

  • Received:2018-04-28 Revised:2018-06-12 Accepted:2018-06-22 Online:2019-05-15 Published:2019-05-15

Abstract: To investigate the application effects of pig manure containing multiple antibiotics and heavy metal elements on soil and crops, a field experiment was carried out to study the after- one- year effects of decomposed pig manure and fresh pig manure on tetracycline antibiotics [tetracycline (TC), oxytetracycline (OTC), chlortetracycline (CTC)] residues, resistant bacteria and heavy metals (Cu, Cd, Ni, Pb, Zn and Cr) in soil. Their effects on soil physical and chemical properties and vegetable yield were also studied. The results showed that the yields of water cabbage, Chinese flowering cabbage, lettuce and green stem vegetable under fresh pig manure (FPM) treatments increased by 11.3%, 3.2%, 75.0% and 6.8% respectively compared with those under decomposed pig manure (CPM) treatments. After one year application of decomposed pig manure (CPM), the number of anti-OTC and anti-TC resistant bacteria in soil was 73.07% and 40.89% higher than that of FPM application, respectively, and the proportion of anti-OTC resistant bacteria to total bacteria was significantly higher than FPM application and CK (163.10% and 307.10%, respectively), the proportion of anti-CTC resistant bacteria to total bacteria was significantly higher than CK (52.3%). The content of TC, OTC, CTC and the total amount of tetracycline antibiotics in soil increased significantly by CPM and FPM. The content of Cd, Cu and Zn in soil of FPM treatments and CPM treatments increased by 52.7%, 33.7% and 29.8% (CPM), 8.7%, 24.1% and 16.9% (FPM), respectively. The content of Cd, Cu and Zn in soil was in order of CPM> FPM>CK. Long-term application of pig manure causes the risk of accumulation of tetracycline antibiotics and heavy metals in soil.