摘要
利用根箱开展了树木修复过程中不同酸化剂处理土壤微生物生物量的动态响应研究。结果表明较高浓度的阿特拉津对土壤微生物具有毒害作用,土壤微生物生物量随时间推移呈总体下降趋势;单纯的树木修复并不能显著提高土壤微生物生物量,酸碱调节剂的施用改变了根际微域的土壤环境,对微生物数量及群落结构产生刺激作用。酸碱调节剂对土壤中微生物活性及其利用氮源的能力具有促进作用:升华硫能在一定程度上减缓土壤微生物生物量碳的降低,氢氧化钙对土壤中微生物活性的恢复具有积极的促进作用。
Hybrid poplar （Populus deltoidsxnigra, DN34） was taken as plant material to remediate soil by rhizobox with sublimed sulfur and calcium hydroxide as soil pH regulators. Results showed higher concentration of atrazine on soil with toxic effects for soil microbe, while soil microbial biomass carbon and soil microbial biomass nitrogen decreased during the whole time. Planting the poplar could not promote the amount of soil microbial biomass, the application of soil pH regulators changed the rhizo-environment of soil, soil microbial community structure and the number of microbe. The addition of soil pH regulators could promote the microbial activity of contaminated soil and the capability of using nitrogen source. Sublimed sulfur could reduce lower soil microbial biomass carbon, while calcium hydroxide could promote the microbial activity of contaminated soil.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2011年第12期105-109,共5页
Environmental Science & Technology
基金
国家自然科学基金(30700637)
中央公益型科研院所基本科研业务费专项资金项目(CAFRIF200706)
