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Ecological Studies on the Revegetation Process of Surface Coal Mined Areas in North Dakota. 11. Effect of Amendments on Soil-plant- nutrient Relations Under Controlled Conditions.
Malakondaiah N; Safaya NM
NTIS: PB/83-171421 :64 pages
Experiments were conducted to study the germination behavior of several native and introduced plant species on mine spoil and plant growth response to nutrients on spoils and topsoils. The seeds of Green Needlegrass, Side Oats Grama, Thickspike Wheatgrass, Crested Wheatgrass, Birdsfoot Trefoil, and Emerald Crownvetch were less tolerant, whereas those of Alkali Sacaton, Durar Hard Fescue, Slender Wheatgrass, Yellow Sweetclover, and Alfalfa were most tolerant to the sodic mine spoils. Addition of leonardite improved germination in some cases. The topsoils were neither saline nor sodic, but low in n and p; the spoils were neutral to alkaline. Application of n and p to the topsoils increased the yield of Wheatgrass and Sweetclover to 77 pct of their respective maximum yields, whereas near maximum yields were obtained for the same species by the same treatment to the spoils. Concentrations of major nutrients were higher in plants grown on topsoil, whereas the opposite was true for concentrations of mn, zn, and cu. Growth response of alfalfa upon application of mn and zn to sodic coal mine spoil improved, but did not for Oats and Slender Wheatgrass. Yields of Alfalfa on spoil fertilized with npk plus mn increased to 85 pct; with npk plus mn and zn, it increased to 99 pct. Results of this study confirm that application of major nutrients to spoil can accentuate mn and zn deficiencies in some plants.
CP; Final Contract Report;
NTIS Accession No.
University of North Dakota
Page last reviewed: November 12, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division