Full TGIF Record # 310309
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Web URL(s):https://scisoc.confex.com/scisoc/2019am/meetingapp.cgi/Paper/119511
    Last checked: 02/05/2020
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Powlen, Jada; Bigelow, Cale; Patton, Aaron J.; Jiang, Yiwei; Fraser, Melodee
Author Affiliation:Powlen, Bigelow, and Jiang: Purdue University, West Lafayette, IN; Patton: Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN; Fraser: Pure Seed, Rolesville, NC
Title:Supplemental irrigation requirements of various Kentucky bluegrass and tall fescue blend ratios subjected to deficit irrigation
Section:C05 turfgrass science
Other records with the "C05 turfgrass science" Section

Turfgrass management and ecology poster (includes student competition)
Other records with the "Turfgrass management and ecology poster (includes student competition)" Section
Meeting Info.:San Antonio, Texas: November 10-13, 2019
Source:ASA, CSSA and SSSA International Annual Meetings. 2019, p. 119511.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Keywords:TIC Keywords: Cultivar evaluation; Deficit irrigation; Drought resistance; Festuca arundinacea; Irrigation requirements; Mowing height; Poa pratensis; Seed mixtures; Seeding ratio
Abstract/Contents:"Lawns in the cool-humid region typically consist of species mixtures or cultivar blends. To maintain a high aesthetic appearance and maximize seasonal greenness, many lawns receive supplemental irrigation. Turfgrass breeders have developed superior cultivars with reduced water needs, but the exact proportion of these grasses to include in lawn seed blends and mixtures to improve performance and reduce irrigation needs has not been well documented. A field study was conducted over two growing seasons under a fixed roof rain-out shelter to determine the irrigation requirements of various blends using different ratios (0, 25, 50, 75, 100% by weight) of drought tolerant (DT) and susceptible (DS) Kentucky bluegrass (KBG) or tall fescue (TF) cultivars at two mowing heights (5.1 or 8.9 cm). Additionally, 90:10 TF:KBG mixtures of DT and DS cultivars were evaluated to determine the supplemental irrigation needs of these popular mixtures. Supplemental irrigation was determined using a 70% green coverage threshold (GCT70) approach, where 12.7 mm of supplemental irrigation was applied if an individual plot fell below GCT70 using digital image analysis. Total irrigation needs ranged from 61.9-173.9 mm over 74 days in year one and 42.7-134.3 mm over 60 days in year two. Irrigation needs generally ranked TF=TF:KBG < KBG. For KBG, a blend containing ā‰„ 75% DT cultivar took the longest to reach GCT70, 31-33 and 24 days, in year one and two, respectively, and needed the least irrigation while providing the highest overall visual quality. Mowing height did not affect KBG but TF mowed at 5.1 cm had lower irrigation needs and higher overall quality during year one. These results indicate that irrigation needs are strongly influenced by species, cultivar composition, and perhaps mowing height."
Note:This item is an abstract only!
"Poster #1626"
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Powlen, J., C. Bigelow, A. J. Patton, Y. Jiang, and M. Fraser. 2019. Supplemental irrigation requirements of various Kentucky bluegrass and tall fescue blend ratios subjected to deficit irrigation. Agron. Abr. p. 119511.
Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=310309
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