Remediation of soil contaminated by atrazine with Pennisetum hydridum
Pot experiments were conducted in order to understand effects of atrazine on growth properties, soil microbial quantities of Pennisetum hydridum and degradation efficiency of atrazine with Pennisetum hydridum. The results indicated that degradation efficiency of atrazine increased significantly under planting Pennisetum hydridum with soil atrazine concentration <200 mg-kg'1 compared with the control. The maximum degradation efficiency reached to 29.64%. Height of Pennisetum hydridum with atrazine concentration ≤200 mg·kg-1 and biomass with atrazine concentration ≤50 mg·kg-1 were decreased significantly. While there was no obvious change in the root-shoot ratio with atrazine stress. With increase in concentrations of atrazine treatment, the quantities of bacteria, fungi and actinomyces in rhizosphere and non-rhizosphere soils showed a trend of increased at first and then decreased, reaching a peak at 100 mg·kg-1. Quantities of bacteria and actinomyces in rhizosphere soil were higher than in non-rhizosphere soil. No obvious difference of quantity of fungi was observed between rhizosphere and non-rhizosphere soils. It is suggested that planting Pennisetum hydridum not only be helpful to improve degradation efficiency of atrazine, but also related to quantity of soil microbial and growth of Pennisetum hydridum.
国家科技期刊平台
NSTL
万方数据
维普
