| |
| Web URL(s): | http://archive.lib.msu.edu/tic/rpr/1999/72299,%20Texas%20A&M,%20White.PDF
Last checked: 02/22/2013
Requires: PDF Reader |
|---|
| Publication Type:
| Report |
|---|
| Material Type: | Manuscript |
|---|
| Monographic Author(s): | White, Richard H.; Hall, Mark |
|---|
| Author Affiliation: | White: Principle Investigator; and Hall: Research Associate |
|---|
| Monograph Title: | Performance and Management of New DwarF Bermudagrasses: 1999 Annual Research Progress Report, 1999. |
|---|
| Publishing Information: | [College Station, Texas:] Texas A&M University, Texas Agricultural Experiment Station |
|---|
| # of Pages: | 16 |
|---|
| Collation: | 10, [6] pp. |
|---|
| Abstract/Contents: | "In general, Champion produced acceptable quality, which increased with increasing N for winter, spring, and summer of 1998. When excessive thatch accumulated in the 683 and 878 kg N ha-1year-1 treatments in late summer 1998, scalping damage began to reduce the quality of Champion at those rates of N. This trend continued in champion during spring 1999 and scalping occurred at all rates of N in summer 1999. This decline in quality trend is further evident in bermudagrass shoot density determinations for fall 1999. Quality of MiniVerde and overseeded MiniVerde tended to increase with N over much of the experiment, and acceptable quality was achieved at the 292 kg N ha-1year-1 for most dates. Floradwarf tended to have a significant response to N throughout the experiment, but acceptable quality was rarely reached in this cultivar regardless of N applied. Turf quality in TifEagle and overseeded TifEagle generally did not deviate far from a rating near minimum acceptable and demonstrated little response to increasing N. Tifdwarf tended to have a strong response to N during the summer seasons, and thatch did not become a problem in this cultivar. Acceptable quality was generally obtained at 488 kg N ha-1year-1, but there was added benefit to increasing N up to the highest rate. Judicious nitrogen management will be important in the management of all these cultivars, but may be more crucial in Champion, MiniVerde, and TifEagle. Thatch accumulation was highly responsive to N in all three cultivars. Thatch became a severe problem in Champion during the first summer of the experiment and showed the potential to affect MiniVerde and TifEagle similarly in the future if there is continued use of high N rates. Severe, infrequent compared with light, frequent vertical mowing reduced thatch in Floradwarf, MiniVerde, TifEagle, and Tifdwarf, but the subsequent reduction in turfgrass quality with the severe vertical mowing treatment may be too detrimental for golf course greens. In MiniVerde, data suggest that the combination of frequent topdressing and frequent light vertical mowing reduced thatch while not decreasing quality. There were no significant topdressing main effects in any cultivar in relation to thatch depth. Both treatments did equally well in controlling the rate of thatch accumulation. A rate of 488 kg N ha-1year-1 was adequate for maintaining acceptable quality in TifEagle and MiniVerde during the summer of 1998 and 1999 and quality increased with N in MiniVerde, In Champion, exceeding a rate of 488 kg N ha-1year-1 had deleterious effects due to excessive thatch accumulation and subsequent scalping damage. Acceptable quality was maintained in Tifdwarf at a low rate of N and quality tended to increase with N during the summer months. Since there was not excessive thatch accumulation across a wide range of vertical mowing or topdressing regimes, a high rate of N could be used in Tifdwarf. No rate of N or set of other cultural practices produced even a minimum acceptable level of quality in Floradwarf. Floradwarf's poor quality may be due to sensitivity of Floradwarf to bermudagrass decline or poor growth response due to high pH (soil test data revealed a pH of 9.4 during summer 1998), which is commonly found in the USGA specification green in College Station, Texas. Overall, there was a significant increase in poa trivalis shoot density from the severe infrequent vertical mowing treatment, but seedlings were generally confined to the grooves created by the vertical mower blades. Turfgrass quality was also negatively affected over the next seven to eight months following the severe fall vertical mowing. The current results of this study suggest that the combination of light frequent vertical mowing and light frequent topdressing produced overseeding shoot densities similar to those found in the heavy vertical mowing treatments, and produced more uniform putting surfaces. It may be beneficial for golf course superintendents to utilize light, frequent vertical mowing and topdressing for maximum turfgrass quality in any of these five cultivars. This approach may require more labor and equipment costs and may not be suitable for Champion if thatch has already accumulated to problematic levels, but generally this approach would be more advantageous than severe vertical mowing. The light, frequent mowing tended to enhance scalping damage in Champion in summer 1999. No treatment combination appeared effective in controlling thatch accumulation in this cultivar." |
|---|
| Language: | English |
|---|
| References: | 0 |
|---|
| See Also: | See also related summary article, "Best management practices for new dwarf bermudagrasses", 1999 Turfgrass and Environmental Research Summary [USGA], 1999, p. 20, R=72299. R=72299 |
|---|
| Note: | Tables
Graphs
"1999 Annual Research Progress Report"
"8 November 1999" |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
No defined citation format for TGIF #: 215785 |
| Fastlink to access this record outside TGIF: https://tic.lib.msu.edu/tgif/flink?recno=215785 |
| If there are problems with this record, send us feedback about record 215785. |
| Choices for finding the above item: |
|---|
| Web URL(s):
http://archive.lib.msu.edu/tic/rpr/1999/72299,%20Texas%20A&M,%20White.PDF
Last checked: 02/22/2013
Requires: PDF Reader |
| Find from within TIC:
Digitally in TIC by record number. |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
