Seedling Competition of Kentucky Bluegrass, Red Fescue, Colonial Bentgrass, and Temporary Grasses1
- R. E. Engel and
- J. R. Trout
Competition among turfgrass seedlings was measured in greenhouse tests between three permanent-type grasses: Kentucky bluegrass (Poa pratensis L.), red fescue (Festuca rubra L.), and colonial bentgrass (Agrostis tenuis Sibth.); among plants of the three permanent-type grasses and three temporary types: perennial ryegrass (Lolium perenne L.), Italian ryegrass (L. multiflorum Lam.), and redtop, (Agrostis alba L.); among plants of the three permanent-type grasses and perennial ryegrass at two seedling rates with the latter used as an increasing percent of the mixture by weight. The persistence of seedling competition effects were determined in a field test. In the greenhouse the seedings were made in 12.7-cm diam pots. After 12 weeks, red fescue was consistently more competitive than colonial bentgrass or Kentucky bluegrass. Ryegrass competition severely suppressed size and total shoot weight of the permanenttype turfgrasses. Competition increased with increases in content and seeding rate of the ryegrass in the mixture. Redtop, on an equal number of seed basis, was far less competitive than both ryegrasses. In most comparisons competition severely depressed Kentucky bluegrass, but its development was good when the seeding rate was under 20 seeds/6.5 cm2. In a field test, the competition of perennial ryegrass delayed Kentucky bluegrass dominance in the turf sward until the fourth season.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