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| Web URL(s): | https://dl.sciencesocieties.org/publications/aj/pdfs/76/1/AJ0760010047
Last checked: 12/08/2016
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| Publication Type:
| Refereed |
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| Author(s): | Mehall, B. J.;
Hull, R. J.;
Skogley, C. R. |
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| Author Affiliation: | Mehall: Graduate Assisant; Hull and Skogley: Professors, Plant and Soil Science Department, University of Rhode Island, Kingston, Rhode Island |
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| Title: | Turf quality of Kentucky bluegrass cultivars and energy relations |
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| Source: | Agronomy Journal. Vol. 76, No. 1, January/February 1984, p. 47-50. |
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| Publishing Information: | Madison, WI: American Society of Agronomy |
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| # of Pages: | 4 |
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| Keywords: | TIC Keywords: Poa pratensis; Photosynthesis; Phosphorus; Potassium; Carbon dioxide exchange rate; Quality evaluation; Cultivar evaluation; Cultivar variation; Stress response; Growth factors; Growth rate
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| Abstract/Contents: | "Future turfgrass improvement will depend upon recognizing those physiological properties responsible for stress tolerance and recovery from injury. Once recognized, these properties may be incorporated into the screening program of cultivar improvement efforts. Because energy capture and transport are basic to plant growth, we measured the variation in these processes between several Kentucky bluegrass (Poa pratensis L.) cultivars of varied origin and growth habit. In turn, CO2-exchange rate (CER), clipping growth rate, and nutrient factors were evaluated for their correlation with turf quality. Field plots were on an Enfield silt loam (coarse-silty over sandy skeletal, mixed, mesic, Typic Distrochrept). Carbon dioxide exchange rate was measured on plots of 15 cultivars during mid-summer, 1978, and nine cultivars during late summer, 1980. On both dates, CER differed between cultivars and in 1978 were positively correlated with turf quality. Correlations between CER and clipping growth were significant but apparent photosynthesis was not related to leaf P and K content or nutrient efficiency ratios (mg dry wt. mg-1 K or P). No significant differences in photosynthate partitioning to roots were noted between 10 cultivars in August or October 1978. This was based upon 14C recovered from roots 2 days following exposure of turf to 14CO2 for 15 min. Nevertheless, the percentage of current photosynthate translocated to roots was positively correlated with the size of the root system and negatively correlated with clipping production. Kentucky bluegrass cultivars which partition more energy to roots appear more likely to produce quality turf. Of the cultivars tested, 'Enmundi' possessed the most favorable energy distribution pattern and produced a quality turf." |
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| Language: | English |
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| References: | 12 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Mehall, B. J., R. J. Hull, and C. R. Skogley. 1984. Turf quality of Kentucky bluegrass cultivars and energy relations. Agron. J. 76(1):p. 47-50. |
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| Web URL(s):
https://dl.sciencesocieties.org/publications/aj/pdfs/76/1/AJ0760010047
Last checked: 12/08/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: S 22 .A45 |
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