会议专题

DROUGHT STRESS RESPONSE OF EIGHT BERMUDAGRASS CULTIVARS

  Drought resistance is increasingly becoming a more valued characteristic of turfgrass species in many areas of the United States because of increased watering restrictions.Bermudagrass (Cynodon sp.L. Rich) is used extensively in the southeastern United States on athletic fields and golf course fairways due to its durability,aesthetics,and drought tolerance.The objective of the study was to evaluate the drought resistance of eight bermudagrass cultivars including,‘TifSport’,‘Tifway’,‘Tifton 10’,‘Navy Blue’,‘GN-1’,‘Patriot’,‘Celebration’ and ‘Quickstand’.Twelve cores of each cultivar were removed from two-year-old field plots during August 2003 and 2004 and were allowed to root in a fritted clay soil medium to become acclimated in a greenhouse for four weeks before drought stress was induced.During the acclimation period the bermudagrass was irrigated twice daily to bring the soil medium to field capacity.Subsequently,water was withheld and the study continued seven weeks without water,during which time visual ratings were taken weekly and the time at which leaf firing occurred was recorded.Leaf firing appeared on Tifton 10,Patriot and Navy Blue at 6.0 or more weeks after water was withheld in 2003.This was longer than GN-1,Celebration,TifSport,Quickstand,and Tifway that showed signs of leaf firing,4.8,4.1,3.8,3.8,and 3.6 weeks after drought stress was induced.In 2004,Navy Blue did not show signs of leaf firing until 7.0 weeks after water was withheld which was longer than all other cultivars.Visual turf quality ratings followed a similar trend to leaf firing in both years.This study provides information regarding cultivar differences in drought resistance in bermudagrass.

bermudagrass drought

James M. Rutledge Charles H. Peacock Richard J. Cooper

Bayer Crop Science Corporation,Research Triangle Park,NC 27713 USA Dept. of CropScience,North Carolina State University,Raleigh,NC 27695-7620 USA

国际会议

The 12th International Turfgrass Research Conference(第十二届国际草坪学术大会)

北京

英文

415-418

2013-07-14(万方平台首次上网日期,不代表论文的发表时间)