Effects of pig manure and oxytetracycline on microbial number and activity in soils with different fertility levels Influence of oxytetracycline exposure on antibiotic resistant bacteria and enzyme activities in wheat rhizosphere soil Effect of Oxytetracycline on the Morphology of Seedling with Witches‘ Broom and DNA Methylation Level of Paulownia tomentosa×P. fortunei Toxicological study of three veterinary drugs on Eisenia foetida MSAP analysis of DNA methylation in Arabidopsis (Arabidopsis thaliana) under Oxytetracycline Stress Isolation and distribution of oxytetracycline\|resistant entophytic bacteria in plant of wheat PERFORMANCE LIQUID CHROMATOGRAPGY