The effect of the perpendin and alpha-pyrenees is weaker than the volatile oil, and the maximum processing concentration group of paragaffin and alpha-pyrene, the seedling height, main root length, leaf area, biomass and pore density were 72.43% of the control, respectively. 85.45 per cent, 83.50 per cent, 75.53 per cent and 124.19 per cent, 74.10 per cent, 81.51 per cent, 84.56 per cent, 87.21 per cent and 110.45 per cent.
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