两种AMF对巨菌草根际土壤Cd生物可利用性以及Cd积累的影响

发布时间：2017-12-27 05:07

本文关键词：两种AMF对巨菌草根际土壤Cd生物可利用性以及Cd积累的影响　出处：《农业环境科学学报》2016年12期 　论文类型：期刊论文

【摘要】：利用盆栽巨菌草(Pennisetum sp.)实验,研究了不同土壤镉(Cd)浓度(T0:空白;T1:5 mg·kg~(-1);T2:10 mg·kg~(-1);T3:15 mg·kg~(-1))条件下,接种两种丛枝菌根真菌(Arbuscular mycorrhizal fungi,AMF)[摩西斗管囊霉(Funneliformis mosseae,Fm)和根内根孢囊霉(Rhizophagus intraradices,Ri)]后土壤中Cd的生物有效性、巨菌草生物量、巨菌草Cd积累量等的变化。结果表明:与不施加菌剂(CK)相比,接种AMF显著降低了土壤中Cd的生物可利用性,在5、10、15 mg·kg~(-1)处理下,接种Fm和Ri后可交换态Cd分别降低了18.65%、20.51%、6.53%和12.54%、16.64%、6.66%;在10、15 mg·kg~(-1)处理下,接种Fm和Ri,植物地上部分生物量分别增加了20.98%、36.94%和36.54%、43.88%,地下部分生物量增加了14.31%、21.79%和25.78%、12.83%。接种AMF显著提高了巨菌草对Cd的吸收能力,其中在5 mg·kg~(-1)处理下接种Ri,巨菌草的重金属富集系数(BCF)最高,达到0.77,由于植物地上、地下部分Cd的含量均增加,巨菌草的Cd转移系数(TF)并没有显著变化。
[Abstract]:Using potted Jujun grass (Pennisetum sp.) experiment, study the effects of soil cadmium (Cd) concentration (T0: T1:5 mg kg~ blank; (-1); T2:10 mg kg~ (-1); T3:15 mg kg~ (-1)) under the condition of two kinds of inoculation of arbuscular mycorrhizal fungi (Arbuscular mycorrhizal, fungi, AMF) [Mose hopper (Funneliformis mosseae, tube fungus Fm) and root root cyst mold (Rhizophagus intraradices, Ri)] changes in soil after Cd bioavailability, Jujun grass biomass, Cd accumulation of Jujun grass. The results show that with imposetheagents (CK) compared with AMF inoculation significantly decreased soil Cd bioavailability, in 5, 10, 15 mg - kg~ (-1) treatment, inoculation of Fm and Ri after 18.65%, 20.51%, 12.54%, 16.64%, 6.53% and 6.66% decreased exchangeable Cd respectively in 10, 15; Mg kg~ (-1) treatment, inoculation of Fm and Ri, the aboveground plant biomass were increased by 20.98%, 36.94% and 36.54%, 43.88%, underground biomass increased by 14.31%, 21.79%, 12.83% and 25.78%. AMF inoculation significantly increased the absorption ability of Jujun grass on the Cd, which in the 5 mg - kg~ (-1) treatment with Ri heavy metals giant JUNCAO enrichment coefficient (BCF) reached 0.77, the highest content of plant aboveground and underground parts of Cd are increased, the giant JUNCAO transfer coefficient (TF) and Cd there was no significant change.
【作者单位】：广东工业大学环境科学与工程学院;环境保护部华南环境科学研究所;广州日之建土壤修复科技有限公司;
【基金】：国家自然科学基金项目(31370530,21677041,41371317) 广州市科技计划项目(201604030017,201604020077)
【分类号】：X53;X17
【正文快照】： 我国的土壤污染问题一直存在,20世纪90年代以来,Cd污染耕地面积已达到1.3×104hm2,2014年在环境保护部、国土资源部联合发布的全国土壤污染状况调查公报中显示,Cd是所有采样点超标率最高的重金属污染物[1-3]。2010年由我国水稻研究所与农业部稻米及制品质量监督检验测试中心发

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