THE INFLUENCE OF MYCORRHIZAL SYMBIOSIS AND FERTILIZER AMENDMENTS ON ESTABLISHMENT OF VEGETATION IN HEAVY-METAL MINE SPOIL

被引:67
作者
HETRICK, BAD
WILSON, GWT
FIGGE, DAH
机构
[1] Department of Plant Pathology, Kansas State University, Manhattan
关键词
D O I
10.1016/0269-7491(94)90188-0
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Biomass production of Andropogon gerardii and Festuca arundinacea was assessed in mine tailings (chat), a material containing high levels of zinc. The effects of organic and inorganic fertilizer amendments, the addition of an expanded clay material, and mycorrhizal fungi on the revegetation of chat were assessed. Plant growth in chat was best with mycorrhizal inoculation combined with nitrogen (either organic or inorganic) and phosphorus fertilization. Plant growth was also achieved if the chat material was amended with expanded clay and N and P fertilizer. However, the biomass produced in contaminated soil did not equal that of similarly fertilized uncontaminated soil. Regression analysis and canonical discriminate analysis revealed significant differences in the responses of the two plant species to the various chat amendments. Although F. arundinacea generally produced greater biomass than A. gerardii, it tended to accumulate more zinc in the shoots than A. gerardii. Therefore, if plant cover is to be used as forage or if wind-blown plant dry matter is of concern, A. gerardii may be more appropriate than F. arundinacea for revegetation of these toxic sites. Alternatively, if maximum plant cover is of primary importance to reduce wind or water erosion from contaminated soils, F. arundinacea may be the species of choice.
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页码:171 / 179
页数:9
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