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| Web URL(s): | http://archive.lib.msu.edu/tic/rpr/1986/9238,%20U%20Nebraska, Shearman.PDF
Last checked: 09/16/2014
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Material Type: | Manuscript |
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| Monographic Author(s): | Shearman, Robert C. |
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| Author Affiliation: | Professor, Turfgrass Culture and Physiology |
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| Monograph Title: | Turfgrass Cultural Practices and Their Interactive Effects on Rooting: [1986 Annual Progress Report], 1986. |
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| Publishing Information: | [Lincoln, Nebraska]: University of Nebraska |
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| # of Pages: | 37 |
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| Collation: | [2], 35 pp. |
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| Abstract/Contents: | "Joint agreement for this research project was reached on 19 April 1985 between the USGA and UN-L. Initiation funding occurred with a grant-in-aid of $4,000 in 1984. In 1985 $23,000 was granted for project support. This was followed by $20,000 in 1986. Total support to date for this project is $47,000. 1. Accomplishments Toward USGA Project Goals: The USGA has set goals of 50% reduction in turfgrass water use and 50% lower maintenance costs. Results from the irrigation frequency x potassium nutrition study conducted during 1986 demonstrated that decreasing irrigation frequency and increasing potassium nutrition levels resulted in equal or better putting green conditions than turfs receiving frequent daily irrigation. Snow mold (Typhula blight) incidence decreased with increasing potassium. A 60% reduction in disease incidence was found between treatments of 4 and 8 lbs K/1000 ft2/season. These results indicate a strong potential to reduce maintenance cost by manipulating irrigation frequency and potassium nutrition, particularly on sand growing media. 2. Other Research Accomplishments: The interaction of turfgrass species root growth and distribution was investigated under drought stress conditions. Species were eliminated when root growth ceased and permanent wilt symptoms were expressed. Tall fescue, creeping red fescue, perennial ryegrass and creeping bentgrass produced roots to 1220 mm to 1520 mm. Rough bluegrass ranked intermediate in root production, but wilted very early in the drought stress cycle since approximately 50% of its rooting was in the upper 0 to 150 mm of the profile. Sixteen Kentucky bluegrasses were investigated for intraspecific responses in root growth and distribution, top growth, and amount of root growth supporting top growth. Cultivars were found to vary by as much as 50% to 56% in these characteristics. Ram I, Touchdown and Eclipse had high percentages of root growth supporting top growth. Potassium nutrition studies on creeping bentgrass and Kentucky bluegrass demonstrated that drought avoidance characteristics increased with K nutrition. Wilting tendency decreased as K nutrition was increased from 0 to 8 lbs K/1000ft2. Turfgrass wear tolerance increased with increasing K rates. 3. Other UN-L Contributions: Studies were initiated in the JSA Turfgrass Rhizotron to investigate growing media and microenvironment. An ERDAS system was purchased to be used as a means to quanitate [quantitate] turfgrass root growth in the rhizotron and in other rooting studies. An additional 10,000 ft2 of creeping bentgrass green area was established for research purposes. This additional green brings the total area to approximately 56,000 ft2. A creeping bentgrass cultivar study was initiated September 1986. Plots were designed to incorporate cultural practice on the replicated cultivar study." |
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| Language: | English |
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| References: | 0 |
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| See Also: | See also related summary article "Turfgrass cultural practices and their interactive effects on rooting" Annual Turfgrass Research Report [USGA/GCSAA], December 1986, p. 9-10, R=9238. R=9238 |
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| Note: | Includes "Index"; p. [2]
"A USGA/University of Nebraska Research Project Initiated: 19 April 1985"
"USGA Research Project Progress Report (1986) - Turfgrass Culture"
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
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| Web URL(s):
http://archive.lib.msu.edu/tic/rpr/1986/9238,%20U%20Nebraska, Shearman.PDF
Last checked: 09/16/2014
Requires: PDF Reader |
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