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Title: Nitrogen fixation (Acetylene Reduction) by annual winter legumes on a coal surface mine

The winter annuals, crimson clover, rose clover, subterranean clover and hairy vetch, were evaluated for nitrogen fixing capacity on coal surface mine substrates by measuring their ability to reduce acetylene to ethylene. The effects of fertilizer, Abruzzi rye, Kentucky 31 fescue grass and a phytotoxic plant Chenopodium album on nitrogen fixation were also assessed. Crimson clover was recommended as the best legume to use on topsoil and shale in the south. Hairy vetch gave good results on shale and subterranean clover did well on topsoil. The use of these species for revegetation is discussed. Overall, no correlation between substrate pH and ethylene levels was found and effects of substrate depended upon the legume species. Super phosphate fertilizer supported less nitrogen fixation than 13-13-13. Abruzzi rye in some unknown way inhibited plant density and nitrogen fixation by legumes but not by free living substrate micro-organisms. Shale from under dead Chenopodium plants in both field and greehouse experiments did not inhibit nitrogen fixation. 7 tables.
Authors:
Publication Date:
OSTI Identifier:
6394536
Resource Type:
Book
Publisher:
University of Alabama,University, AL
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 54 ENVIRONMENTAL SCIENCES; LAND RECLAMATION; REVEGETATION; LEGUMINOSAE; NITROGEN FIXATION; SURFACE MINING; ACETYLENE; CLOVER; COAL MINES; ETHYLENE; FERTILIZERS; PH VALUE; REDUCTION; RYE; VICIA; ALKENES; ALKYNES; CEREALS; CHEMICAL REACTIONS; GRAMINEAE; GRASS; HYDROCARBONS; MINES; MINING; ORGANIC COMPOUNDS; PLANTS; UNDERGROUND FACILITIES 010900* -- Coal, Lignite, & Peat-- Environmental Aspects; 012000 -- Coal, Lignite, & Peat-- Mining; 510500 -- Environment, Terrestrial-- Site Resource & Use Studies-- (-1989)