| Autor: |
Nelson, L. R., Crowder, J., Pemberton, H. B. |
| Předmět: |
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| Zdroj: |
HortTechnology; Apr-Jun2005, Vol. 15 Issue 2, p304-308, 5p, 9 Charts |
| Abstrakt: |
Perennial ryegrass (Lolium perenne) has traditionally been used to overseed warm-season grasses in the southern U.S. when warm-season sods are dormant due to chilling temperatures. In this study we investigated overseeding turf-type annual ryegrass (two cultivars of L. multiflorum and one cultivar of L. rigidum) and chewing fescue (Festuca rubra var. commutata) as well as perennial ryegrass onto a warm-season common bermudagrass (Cynodon dactylon) sod. The objective was to compare turf quality, turf color, and transition date of turf-type annuals with perennials and other cool-season grasses. Results for turf quality indicated that the annual ryegrass cultivars 'Axcella' and 'Panterra' (L. multiflorum) compared very well with perennials through March; however, in April and May, perennials were superior for quality. 'Hardtop' fine rescue is a hard rescue (F. ovina var. duriuscula). It was inferior to the annuals for turf quality from December to April when the annuals began to die. For turf color, annuals had a lower rating compared to dark green perennials such as 'Premier II', 'Derby Supreme', or 'Allstar'. 'Panterra' was darker compared to 'Axcella' in March and April. Chewing fescue was intermediate in color compared to annuals and perennials. For turf height, 'Axcella' was taller than 'Panterra', which were both taller than the perennials, and the fine fescues were shorter than the perennials. For transition in the spring, the annuals had a shorter transition and died about 1 month earlier than the perennials. 'Transtar' (L. rigidum) had an earlier transition than the other annuals. The perennials tended to have a longer transition period. The fescues had a very long transition period and were similar to the perennials. [ABSTRACT FROM AUTHOR] |
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