毛竹根际与非根际土壤重金属、理化性质及酶活性特征

发布时间：2018-03-18 07:00

本文选题：毛竹　切入点：根际土　出处：《生态学报》2017年18期 　论文类型：期刊论文

【摘要】：于2014年2月至2015年1月在浙江省衢州市铅锌矿附近毛竹林地采集土样,对土壤重金属含量、pH以及土壤酶活性等的动态变化特征进行了研究。结果表明:根际土与非根际土的p H在1a中变化均不明显,且变化范围都处在4.50—4.85之间;非根际土的土壤含水率大于根际土,两者的变化幅度较大,最低值均出现在6月和10月;根际土中Zn和Cd的有效态含量远高于非根际土,而Pb的有效态含量则表现出非根际土大于根际土的特点;过氧化氢酶、磷酸酶、脲酶和脱氢酶在根际土中的活性明显高于非根际土;从土壤重金属有效态与土壤酶活性相关性来看,根际土中,除有效态Pb与过氧化氢酶呈显著负相关外,其余重金属元素有效态与土壤酶活性相关性均没有显著相关性,而在非根际土壤中,有效态Cd与过氧化氢酶呈极显著负相关,与脲酶呈显著负相关,Zn和Cd则与土壤酶活性之间没有显著相关性。综合研究结果表明,毛竹根际土壤质量总体上明显优于非根际土,这为毛竹今后作为植物修复的材料提供了一定的理论依据。
[Abstract]:From February 2014 to January 2015, soil samples were collected from Phyllostachys pubescens forest near lead and zinc mine in Quzhou City, Zhejiang Province. The dynamic changes of soil heavy metal content, pH and soil enzyme activity were studied. The results showed that the pH of rhizosphere soil and non-rhizosphere soil did not change significantly in 1 year, and the range of variation was between 4.50 and 4.85. The soil moisture content in the non-rhizosphere soil was larger than that in the rhizosphere soil, and the range of variation was greater than that in the rhizosphere soil, and the lowest values occurred in June and October. The available contents of Zn and CD in the rhizosphere soil were much higher than those in the non-rhizosphere soil. The available Pb content showed that the activity of catalase, phosphatase, urease and dehydrogenase in non-rhizosphere soil was significantly higher than that in non-rhizosphere soil, and the activity of catalase, phosphatase, urease and dehydrogenase in rhizosphere soil was higher than that in non-rhizosphere soil. In the rhizosphere soil, except available Pb and catalase, there was no significant correlation between available heavy metal available state and soil enzyme activity, but there was no significant correlation between available heavy metal available state and soil enzyme activity in rhizosphere soil, except for the significant negative correlation between available Pb and catalase activity. But in non-rhizosphere soil, available CD was significantly negatively correlated with catalase and urease, while Zn and CD had no significant correlation with soil enzyme activity. The quality of rhizosphere soil of Phyllostachys pubescens was obviously superior to that of non-rhizosphere soil in general, which provided a theoretical basis for Phyllostachys pubescens as phytoremediation materials in the future.
【作者单位】：浙江农林大学省部共建亚热带森林培育国家重点实验室浙江省土壤污染生物修复重点实验室;
【基金】：国家自然科学基金(No.31670617) 浙江省科技厅重点研发项目(2015C03G 4010004)
【分类号】：S714;S795.7

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