首页|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

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

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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。
Impacts of two kinds of arbuscular mycorrhizal fungi on rhizospheric bio-available Cd and accumulation of Cd for Pennisetum sp.
Pennisetum sp. was inoculated with two different types of arbuscular mycorrhizal fungi:Funneliformis mossea(Fm)and Rhizopha-gus intraradices(Ri). And the variations of the rhizospheric bio-available Cd, biomass and plant Cd accumulation were investigated. Four treatments of soil Cd contents(T0:the control, T1:5 mg·kg-1, T2:10 mg·kg-1 and T3:15 mg·kg-1)were carried out by pot experiment. It indicated that the inoculation had significantly decreased the bio-available Cd content. Compared with the control, the ion exchangeable Cd decreased by 18.65%, 20.51%and 6.53%at soil Cd contents of 5 mg·kg-1, 10 mg·kg-1 and 15 mg·kg-1, respectively. And the acidic dis-soluble-Cd decreased correspondingly by 12.54%, 16.64%and 6.66%respectively. When treated by soil Cd contents of 10 mg·kg-1 and 15 mg·kg-1, the above-ground biomass of Pennisetum sp. increased by 20.98%, and 36.94%inoculated with Fm, and 36.54%and 43.88%in-oculated with Ri, while the below-ground biomass increased by 14.31%and 21.79%inoculated with Fm, and 25.78%and 12.83%inocu-lated with Ri, respectively. As a result, no obviously variation was observed with the translocation factor (TF), but the inoculation of AMF had significantly increased the Cd accumulation in Pennisetum sp.. The bio-concentration factor(BCF)could reach 0.77 at soil Cd content of 5 mg·kg-1 after inoculating with Ri.

Pennisetum sp.arbuscular mycorrhizal fungi(AMF)Cd

姬朋朋、尹光彩、陈志良、周兵、林亲铁、刘千钧、刘德玲

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广东工业大学环境科学与工程学院，广州 510006

环境保护部华南环境科学研究所，广州 510655

广州日之建土壤修复科技有限公司，广州 511450

巨菌草 丛枝菌根真菌 镉

国家自然科学基金国家自然科学基金国家自然科学基金广州市科技计划项目广州市科技计划项目

313705302167704141371317201604030017201604020077

2016

10.11654/jaes.2016-0878

农业环境科学学报
农业部环境保护科研监测所 中国农业生态环境保护协会

农业环境科学学报

CSTPCDCSCD北大核心
影响因子：1.52
ISSN：1672-2043
年,卷(期)：2016.35(12)
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