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Growth and metal accumulation of forage grasses at various clipping dates on acid mine spoils

 

作者: R. W. Taylor,   I. O. Ibeabuchi,   J. W. Shuford,  

 

期刊: Journal of Environmental Science and Health . Part A: Environmental Science and Engineering  (Taylor Available online 1989)
卷期: Volume 24, issue 2  

页码: 195-204

 

ISSN:0360-1226

 

年代: 1989

 

DOI:10.1080/10934528909375474

 

出版商: Taylor & Francis Group

 

关键词: heavy metal accumulation;AI toxicity

 

数据来源: Taylor

 

摘要:

Dry matter yield, heavy metals and Al accumulation by seven forage grasses, bermudagrass (Cynodon dactylon). Kentuckty 31‐tall fescue (Festuca arundinacea),oat (Avena sativa), orchardgrass (Dactylis glomerata),perennial ryegrass (Lolium perenne), triticale (×Triticosecale Wittmack) and winter wheat(Triticum aestivum) were investigated on three different Alabama acid mine spoils. The objective was to study the growth response (dry matter basis) and metal accumulation at different clipping dates to determine which grasses may be effectively used to lower metal levels in the acid spoils during reclamation. The grasses were clipped at 47, 58, 68 and 83 days after planting and dry matter yield and tissue levels of metals determined. Bermudagrass grew best on all spoils and clipping intervals did not generally influence dry matter yield and metal accumulation. The other grasses had late (oat only) or early restricted growth and were not considered effective for use in reclamation of spoils studied due to poor growth. The bermudagrass accumulated high total levels of Mn (when all 4 clippings were considered) and lower levels of Al compared to the other grasses. It is recommended as a good crop to lower metal levels on acid spoils similar to those used in this study before planting less tolerant but more economic crops and/or trees especially where liming of the spoils to reduce availability may not be feasible.

 

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