Effects of Arbuscular Mycorrhizal Fungi (AMF) on Distribution of Pb Forms in Rhizosphere of Upland Rice  

丛枝菌根真菌对旱稻根际Pb形态分布的影响(英文)

作　　者：张旭红[1,2] 林爱军[2] 张莘[3] 郭兰萍[4] 

机构地区：[1]北京城市学院,北京100083 [2]北京化工大学环境科学与工程系,北京100029 [3]中国科学院生态环境研究中心城市与区域生态国家重点实验室,北京100085 [4]中国中医科学院中药研究所,北京100700

出　　处：《Agricultural Science & Technology》2012年第7期1484-1488,1520,共6页农业科学与技术（英文版）

基　　金：国家自然科学基金项目"丛枝菌根对砷的吸收,代谢和耐性研究机制,低剂量镉影响青蒿中青蒿素积累的Hormesis机理研究"(41101246,81072989)~~

摘　　要：[Objective] The aim was to study the effects of AMF on distribution of Pb in different chemical forms in rhizosphere soil of upland rice. [Method] A pot experiment was conducted to explore effects of AMF inoculation on distribution of Pb in different forms in rhizosphere of rice (Oryzal sativa L.) with Pb in different concentrations (0, 300 and 600 mg/kg). [Result] With inoculation adopted, mycorrzhial colonization rate of upland rice under Pb pdlution root declined substantially with Pb increasing in soils (P<0.05). Compared with non-inoculation, rhizosphere pH significantly enhanced by inoculation; when Pb was at 300 mg/kg, glomalin content in soils improved significantly by inoculation; when Pb was at 600 mg/kg, glomalin content in soils declined substantially (P<0.05). In addition, inoculation significantly improved contents of Pb in exchangeable and organic forms, but lowered Pb in carbonate bound and Fe-Mn oxides bound forms (P<0.05). [Conclusion] The research indicated that AMF inoculation would change distribution of Pb in different forms in rhizosphere soils of upland rice.[目的]为了研究丛枝菌根真菌对旱稻根际土壤中重金属铅(Pb)化学赋存形态的影响。[方法]采用盆栽实验的方法,研究了不同Pb处理水平(0、300、600mg/kg)下,接种丛枝菌根真菌(AMF)Glomus mosseae对旱稻(OryzalsativaL.)根际Pb形态分布的影响。[结果]接种处理下,旱稻根系侵染率以及根外菌丝量随着土壤Pb含量增加而显著降低(P<0.05)。与未接种处理相比,接种处理显著提高Pb处理下根际pH;300mg/kgPb处理下,接种显著增加土壤球囊霉素含量,600mg/kgPb处理下,接种处理显著降低土壤球囊霉素含量(P<0.05);在Pb处理下,与未接种处理相比,接种处理显著提高可交换态Pb含量,显著降低了碳酸盐结合态以及铁锰氧化物结合态Pb含量,却显著增加了土壤中有机质结合态Pb含量(P<0.05)。[结论]这说明接种丛枝菌根真菌可以改变旱稻根际土壤中Pb的形态分布。

关 键 词：Pb distribution Arbuscular mycorrhizal fungi Upland rice RHIZOSPHERE 

分 类 号：S511.6[农业科学—作物学]