scholarly journals Temperature Effects on the Speed and Completion of Germination of 19 Commercially Available Seeded Bermudagrass Cultivars

2013 ◽  
Vol 23 (1) ◽  
pp. 82-85 ◽  
Author(s):  
Michael T. Deaton ◽  
David W. Williams
Keyword(s):  
Cynodon Dactylon ◽  
Germination Rate ◽  
Early Summer ◽  
Golf Course ◽  
Science Laboratory ◽  
University Of Kentucky ◽  
Temperature Regimes ◽  
Germination Characteristics ◽  
Athletic Field ◽  
The University

The use of seeded bermudagrasses (Cynodon dactylon) is increasing as athletic field and golf course turf. Anecdotal evidence indicates probable and important differences in germination rates among cultivars when established in late spring or early summer. Germination studies were completed in May 2011 in the Turfgrass Science Laboratory at the University of Kentucky on 19 commercially available seeded bermudagrass cultivars. Evaluations for germination rate and total germination under varying temperature regimes representing 20-year average day/night temperatures for seeding times from 15 May to 1 Aug. were conducted to quantify any differences in germination characteristics among cultivars as affected by temperature. There were highly significant differences (P < 0.0001) among cultivars in germination rate and total germination when grown under 20-year average day/night temperatures. The cultivars Casino Royale and Riviera consistently represented the fastest/slowest to germinate and highest/lowest total seeds germinated across all temperature regimes, respectively. Significant differences (P < 0.0001) were also observed within cultivars for total germination across the temperature regimes tested. The average temperatures of 15 May and 1 Aug. represented slowest/fastest to germinate and lowest/highest total seeds germinated across all temperature regimes, respectively.

scholarly journals Seed germination characteristics of Halogeton glomeratus

2001 ◽  
Vol 79 (10) ◽  
pp. 1189-1194 ◽  
Author(s):  
M Ajmal Khan ◽  
Bilquees Gul ◽  
Darrell J Weber
Keyword(s):  
Seed Germination ◽  
Great Basin ◽  
Temperature Regime ◽  
Germination Rate ◽  
Distilled Water ◽  
Salinity Treatment ◽  
Temperature Regimes ◽  
Germination Characteristics ◽  
Nacl Concentration ◽  
Halogeton Glomeratus

Halogeton glomeratus (Bieb.) C.A. Mey, an annual forb in the family Chenopodiaceae, is widely distributed in the inland salt deserts of western North America. Experiments were conducted to determine the effects of NaCl and temperature on seed germination and the recovery of germination responses after transfer to distilled water. Seeds of H. glomeratus were germinated at various temperature regimes (5–15°C, 10–20°C, 10–30°C, 15–25°C, 20–30°C, and 25–35°C), and salinities (0, 200, 400, 600, 800, and 1000 mM NaCl) in a 12 h dark : 12 h light photoperiod. Increases in NaCl concentration progressively inhibited seed germination, and this inhibition was more substantial in the dark than in the photoperiod treatment. Seed germination at concentrations higher than 800 mM NaCl was low (10%). Cooler temperatures significantly inhibited germination in all treatments. A temperature regime of high night (25°C) and high day (35°C) temperatures led to higher germination. Rate of germination decreased with an increase in salinity and was highest at 25–35°C and lowest at 5–15°C temperature regimes. Seeds were transferred from salt solution to distilled water after 20 days, and those from high salinities recovered quickly at all temperature regimes. Recovery germination percentages from the highest salinity treatment varied from 51 to 100% at various temperature regimes.Key words: Great Basin desert, Halogeton glomeratus, halophyte, recovery of seed germination, salt deserts, temperature regime.

Influence of post-treatment irrigation timings and herbicide placement on bermudagrass and goosegrass (Eleusine indica) response to low-dose topramezone and metribuzin programs

Weed Science ◽  
2021 ◽  
pp. 1-23
Author(s):  
John R. Brewer ◽  
Jordan C. Craft ◽  
Shawn D. Askew
Keyword(s):  
Low Dose ◽  
Cynodon Dactylon ◽  
Post Treatment ◽  
Golf Course ◽  
High Dose ◽  
Insufficient Evidence ◽  
Eleusine Indica ◽  
Athletic Field ◽  
Minute Post ◽  
Herbicide Mixtures

Abstract Immediate, post-treatment irrigation has been proposed as a method to reduce hybrid bermudagrass [Cynodon dactylon (L.) Pers. x Cynodon transvaalensis Burtt Davy] phytotoxicity from topramezone. Immediate irrigation is impractical since it would take a turfgrass sprayer 10 to 15 minutes to cover an average golf course fairway or athletic field. There is also insufficient evidence regarding how post-treatment irrigation, immediate or otherwise, influences mature goosegrass [Eleusine indica (L.) Gaertn.] control from topramezone or low-dose topramezone plus metribuzin programs. We sought to investigate bermudagrass and E. indica response to immediate, 15-minute, and 30-minute post-treatment irrigation compared to no irrigation following topramezone at 12.3 g ae ha−1, the lowest labeled rate, or topramezone at 6.1 g ha−1 plus metribuzin at 210 g ai ha−1. We also evaluated placement of each herbicide and their combination on soil, foliage, and soil plus foliage to help elucidate the mechanisms involved in differential responses between species and herbicide mixtures. Responses were largely dependent on trial due to bermudagrass injury from high-dose topramezone being nearly eliminated by immediate irrigation in one trial and only slightly affected in another. When post-treatment irrigation was postponed for 15 or 30 minutes, topramezone alone injured bermudagrass unacceptably in both trials. Bermudagrass was injured less by low-dose topramezone plus metribuzin than by high-dose topramezone. All post-treatment irrigation timings reduced E. indica control compared to no post-treatment irrigation. The herbicide placement study suggested that topramezone control of E. indica is highly dependent on foliar uptake and phytotoxicity of both bermudagrass and E. indica is greater from topramezone than metribuzin. Thus, post-treatment irrigation likely reduces topramezone rate load with a concomitant effect on plant phytotoxicity of both species. Metribuzin reduced 21-d cumulative clipping wt and tiller production of plants, and this may be a mechanism by which it reduces foliar white discoloration from topramezone.

Adapting a matrix organizational structure to the College of Dentistry at the University of Kentucky

1989 ◽  
Vol 53 (4) ◽  
pp. 246-252
Author(s):  
DA Nash ◽  
EP Hicks ◽  
HR Laswell ◽  
GP Lewis ◽  
TT Lillich ◽  
...  
Keyword(s):  
Organizational Structure ◽  
University Of Kentucky ◽  
The University

Effects of Dried Distillers’ Grains Cube Supplementation for Steers Grazing Introduced Pastures on Animal Performance and Forage Production

2021 ◽  
Vol 99 (Supplement_2) ◽  
pp. 12-13
Author(s):  
Jordan Adams ◽  
Rodney Farris ◽  
Scott Clawson ◽  
Earl Ward ◽  
Paul Beck
Keyword(s):  
Festuca Arundinacea ◽  
Statistical Power ◽  
Cynodon Dactylon ◽  
Animal Health ◽  
Late Summer ◽  
Early Summer ◽  
Distillers Grains ◽  
Forage Production ◽  
Trenbolone Acetate ◽  
Dried Distillers Grains

Abstract We evaluated the effects of supplementing dried distillers’ grains cubes (DDGS) and re-implantation of steers (n = 149; BW = 238 ± 13.8 kg) grazing tall fescue (Festuca arundinacea)/bermudagrass (Cynodon dactylon) pastures (n = 9 pastures, 7.2 ± 2.90 ha) from 14 April to 17 September 2020 (n = 155 d) in a split-plot design on steer performance and forage production. Main plot supplemental treatments (n = 3 pastures/treatment) included 1) Fertilized Control (FC), no supplementation on fertilized pastures (112 kg N/ha); 2) Fertilized Supplement (FS), supplemental DDGS fed at 2.9 kg 3-d/wk on fertilized pastures; and 3) Supplement (S), supplemented DDGS at 0.75% BW/d on unfertilized pastures prorated for 5-d/wk feeding. Steers were previously implanted during receiving with 40 mg trenbolone acetate and 8 mg estradiol (REV-G; Revalor G, Merck Animal Health). On July 7, steers in each pasture were randomly assigned to one of three re-implant treatments: 1) no re-implant; 2) REV-G; or 3) 200 mg progesterone and 20 mg estradiol (Synovex S, Zoetis Animal Health). Steers in FS and S gained more (P &lt; 0.01) than FC throughout the trial and final BW was greater (P &lt; 0.01) for FS and S compared with FC. Unexpectedly, re-implanting had no effect on ADG (P = 0.57) or BW (P = 0.34), but statistical power may be lacking. Supplemental efficiency was greater in the late summer for FS (P = 0.05) compared to S. Fertilizing pastures in FS and FC did not affect biomass (P = 0.39), however, CP was increased (P = 0.01) and acid and neutral detergent fibers tended to decrease (P = 0.06) relative to S in the early summer (April, May, June, and July), but did not differ in late summer (August and September). Based upon our analysis, DDGS is a suitable supplement and can replace N fertilizer for steers grazing introduced pastures.

scholarly journals MALCOLM EDWIN JEWELL

2010 ◽  
Vol 43 (03) ◽  
pp. 585-587
Author(s):  
Bradley C. Canon
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Political Parties ◽  
Political Science ◽  
The Political ◽  
Legislative Behavior ◽  
Science Department ◽  
University Of Kentucky ◽  
Political Science Department ◽  
The University

Malcolm “Mac” Jewell was a mainstay of the Political Science Department at the University of Kentucky (UK) for 36 years. For that same period and even longer, he was one of the profession's leading researchers in explaining legislative behavior (particularly in the states) and how state political parties worked. Mac retired from UK in 1994 but continued being active in our profession. Around 2004, he began suffering from Alzheimer's disease. He died on February 24, 2010, in Fairfield, Connecticut.

Sources

1992 ◽  
Vol 14 (2) ◽  
pp. 40-42
Keyword(s):  
Problem Solving ◽  
Applied Anthropology ◽  
University Of Kentucky ◽  
Wide Range ◽  
Different Types ◽  
The University ◽  
Conference Papers

Sources documents the work of applied and practicing anthropologists. The Project Profiles published here are based on materials submitted to the Applied Anthropology Documentation Project at the University of Kentucky. The project, since its inception in 1978, has attempted to collect the so-called fugitive literature produced by anthropologists during their problem-solving work. The collection has a wide range of different types of materials: technical reports, research monographs, conference papers, practicum and internship reports, legal briefs, proposals, and other materials.

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