title: [Effects of exogenous tetracycline on rape soil enzyme activity and rape quality].
abstract: This paper studied the effects of applying different concentration (0, 0.30, 0.60, and 0.90 mg x kg(-1)) tetracycline on the soil enzyme activities and rape quality. The results showed that soil urease activity after applied 0.30, 0.60, and 0.90 mg x kg(-1) of tetracycline and soil suerase activity after applied 0.90 mg x kg(-1) of tetracycline were inhibited in the whole cultivating period, while the soil sucrase activity after applied 0.30 and 0.60 mg x kg(-1) of tetracycline showed a trend of activation-inhibition-activation. Soil proteinase activity showed a trend of inhibition-activation, and the extent and duration of the inhibition and activation had significant positive correlations with tetracycline concentration (r = 0.950 * *). Soil catalase activity showed activation first and turned to irregular then. The action duration of tetracycline on the activities of soil urease, catalase, sucrase and proteinase were 7 weeks, 6-8 weeks, 7 weeks, and 6-7 weeks, respectively. At harvest time, the soluble sugar contents in rape leaves after applying 0.30, 0.60, and 0.90 mg x kg(-1) of tetracycline decreased dramatically by 91.99%, 87.92%, 90.12%, while the soluble protein content increased by 26.47%, 28.13%, and 23.22%, respectively, compared to the control.
authors: College of Resources and Environment, Shandong Agricultural University, Tai' an 271018, Shandong, China. liujiqiang-007@163.com
authors: Ji-Qiang
authors: JQ
authors: Liu
authors: Yu-Ping
authors: YP
authors: Zhuge
authors: Li-Na
authors: LN
authors: Cui
mesh_terms: D029741:Brassica rapa / Q000737:chemistry / Q000187:drug effects*; D002374:Catalase / Q000378:metabolism; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000633:toxicity*; D013752:Tetracycline / Q000633:toxicity*; D014510:Urease / Q000378:metabolism*
chemical_list: D012987:Soil; D012989:Soil Pollutants; D002374:Catalase; D014510:Urease; D013752:Tetracycline