Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2019, Vol. 40 ›› Issue (12): 2489-2497.DOI: 10.3969/j.issn.1000-2561.2019.12.024

• Agricultural Product Processing, Preservation, Storage, Analysis and Detection • Previous Articles     Next Articles

Comparison of Dissolved Organic Matter from Biochar on Attenuating Biotoxicity of Oxytetracycline

GE Chengjun1,2,3,ZHAO Yuanyuan2,YU Huamei2,YUE Lin2,FU Yue2,MA Ruiyang2,CHENG Lei1,*()   

  1. 1. College of Life Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
    2. College of Ecology and Environment, Hainan University, Haikou, Hainan 570228, China
    3. Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China
  • Received:2019-01-05 Revised:2019-06-17 Online:2019-12-25 Published:2019-12-20
  • Contact: CHENG Lei


In order to explore and state the possibility effects of dissolved organic matter (DOM) on the biotoxicity of oxytetracycline (OTC), aqueous solution and soil culture incubation experiments were conducted to investigate the effects of DOM extracted from biochar, derived from the cassava residue at 350 ℃, 500 ℃, 650 ℃, on the pakchoi (Brassica rapa var. glabra) seed germination, root and bud elongation. Results showed that DOM350 and DOM500 had a promoting effect on seed germination rate of Brassica rapa var. glabra in hydroponic and soil culture condition, which was 3.33% and 10.00%, respectively. For DOM-OTC system, there was a significant correlation between DOM concentrations and bud elongation of pakchoi (B. rapa var. glabra) seeds (P<0.05). Furthermore, DOM had a synergistic effect with low concentration (<34.78 mg/kg) of OTC to promote root and bud extension of seeds, and antagonized the biotoxicity of OTC with high concentration (>94.09 mg/kg) of OTC. However, DOM alleviated the toxicity of OTC on root elongation rate, and had a highly significant effect on shoot elongation of seeds cultured in water (P<0.01), when DOC concentration at 10 mg/L.

Key words: dissolved organic matter, oxytetracycline, Brassica rapa var. glabra, biotoxicity, biochar

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