[1]何学敏,吕光辉,秦璐,等.艾比湖地区典型乔灌群落水盐胁迫下土壤重金属对酶活性的影响[J].水土保持研究,2012,19(06):94-99.
　HE Xue-min,LV Guang-hui,QIN Lu,et al.Effects of Heavy Metals on Soil Enzyme Activities in Typical Arbor-shrub Communities under the Different Water and Salt Conditions in Ebinur Lake Area[J].Research of Soil and Water Conservation,2012,19(06):94-99.
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艾比湖地区典型乔灌群落水盐胁迫下土壤重金属对酶活性的影响

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 19 期数: 2012年06期 页码: 94-99 栏目: 出版日期: 2012-12-20
Title:
Effects of Heavy Metals on Soil Enzyme Activities in Typical Arbor-shrub Communities under the Different Water and Salt Conditions in Ebinur Lake Area
作者:
何学敏1,2, 吕光辉1,2, 秦璐1,2, 马辉英1,2, 何雪芬1,2
1. 新疆绿洲生态教育部重点实验室, 乌鲁木齐 830046;
2. 新疆大学 资源与环境科学学院, 乌鲁木齐 830046
Author(s):
HE Xue-min1,2, LV Guang-hui1,2, QIN Lu1,2, MA Hui-ying1,2, HE Xue-fen1,2
1. Xinjiang Key Laboratory of Oasis Ecology, Ministry of Education, Urumqi 830046, China;
2. College of Resources and Environmental Science, Xinjiang University, Urumqi 830046, China
关键词:
艾比湖; 典型群落; 水盐胁迫; 土壤重金属; 土壤酶活性
Keywords:
Ebinur Lake; typical arbor-shrub communities; stress of soil water and salt; soil heavy metals; soil enzyme activities
分类号:
X53
摘要:
为探讨自然水盐胁迫下土壤重金属对酶活性的影响,对艾比湖国家级自然保护区内3种典型植被群落水盐胁迫下土壤Cd,Cr,Cu等5种重金属和过氧化氢酶、磷酸酶、脲酶等4种酶活性进行了研究.结果表明:不同群落类型土壤水盐、酶活性和重金属含量方面具有各自特征,典型群落中土壤重金属含量对过氧化氢酶活性的影响更为强烈,而这种现象在耐旱植物梭梭中尤为明显,土壤水分受限情况下,以Cd,Cr和Zn为代表的土壤重金属对土壤酶活性有一定影响.在水盐环境较好、重金属含量较少的自然土壤中,土壤重金属对酶活性具有较高的促进作用;重金属含量较少,盐胁迫对酶活性抑制作用明显;水分胁迫对酶活性限制较小,土壤重金属对酶活性的影响小于土壤可溶性总盐,说明自然条件下土壤盐胁迫对土壤酶活性具有强烈的抑制作用;研究区Cd和Cr对土壤酶表现出激活作用,Cu对土壤酶活性的影响不明显,Mn和Zn对土壤酶则多表现出抑制效应.
Abstract:
In order to explore the effects of heavy metals on soil enzyme activities under the stress of water and salt, 5 kinds of heavy metals (Cd, Cr, Cu, Mn and Zn) and four kinds of enzymes (Catalase, Phosphatase, Urease and Sucrase) were examined in three kinds of typical arbor-shrub communities(Populus euphratica, Tamarix ramosissima and Haloxylon ammodendron) under the different habitats in Ebinur Lake Area. The results indicated that different communities had their own characteristics in terms of soil moisture, salt, enzyme activities and heavy metals contents. Heavy metal contents exerted more intense influence on Catalase, particularly in Haloxylon ammodendron which belonged to drought-tolerant plant, Cd, Cr and Zn had a certain influence on enzyme activities under limited soil moisture situations. There were better water and salt environment, and less heavy metal contents in natural soil in which soil enzyme activities were well prompted by heavy metal. Soil enzyme activities were restrained significantly by salt press when the heavy metal contents were less. Water stress imposed little restrictions on enzyme activities, and soil heavy metal contents had less influence on enzyme activities than that of the soil total soluble salt, demonstrating that soil salt stress decreased enzyme activities intensively under natural conditions. Cd and Cr played active function in soil enzyme activities, and Cu had no obvious effect on soil enzyme activities, however, Mn and Zn played inhibitory function in soil enzyme activities.

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备注/Memo

收稿日期:2012-4-1;改回日期:2012-5-28。
基金项目:新疆高校重点基金(XJEDU2006I06);国家自然基金重点项目(41130531)
作者简介:何学敏(1986- ),男,新疆兵团人,在读硕士研究生,主要研究方向为生态学.E-mail:he8669@163.com
通讯作者:吕光辉(1963- ),男,山东青岛人,教授,博士生导师,主要从事干旱区生态研究.E-mail:ler@xju.edu.cn

更新日期/Last Update: 1900-01-01