Lime Responses of Kentucky Bluegrass and Tall Fescue Cultivars on an Acid, Aluminum-Toxic Soil1
- J. J. Murray and
- C. D. Foy
Kentucky bluegrass (Poa pratensis L.) and tall fescue (Festuca arundinacea Schreb.) cultivars, chosen to represent acid-tolerant and sensitive extremes, were grown for 6 weeks in greenhouse pots (1 kg) of Al-toxic Tatum soil (clayey, mixed thermic, typic, Hapludults) limed to a pH range of 4.1 to 7.9.
Kentucky bluegrass cultivars differed significantly in tolerance to the acid, Al-toxic soil. ‘Fylking’, ‘Victa,’ ‘Pennstar’, ‘Touchdown’, and ‘Majestic’ were among the most tolerant and ‘Kenblue’, ‘Windsor’, and ‘South Dakota Common’ were among the most sensitive at pH 5.0. Relative shoot yields (pH 5.0 % /pH 5.7 %) varied from 94 % for Majestic to only 28 % for Kenblue. Among the acid-tolerant group, Fylking and Victa yielded as well at pH 7.3 and 7.6 as at 5.7, but Pennstar declined in yield at the higher pH levels. Acid-tolerant cultivars (pH 4.4 to 5.0) were also most tolerant to alkaline soil (pH 7.3 to 7.6). For example, the relative yields (pH 7.60/0 /pH 5.7 %) for Kenblue and Windsor were only 37 and 42 %, respectively, compared with 100 % for Fylking and 96 % for Victa.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
Copyright © 1980. . Copyright © 1980 by the American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, and International Turfgrass Society, 5585 Guilford Rd., Madison, WI 53711 USA