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Web URL(s): | https://scisoc.confex.com/crops/2012am/webprogram/Paper70835.html Last checked: 11/21/2012 |
Publication Type: | Report |
Content Type: | Abstract or Summary only |
Author(s): | Ebdon, Jeffrey; DaCosta, Michelle; Poro, James |
Author Affiliation: | Univ. of Massachusetts, Amherst, MA |
Title: | Efficient irrigation for recreational turf in the cool-humid northeast: I. ET and crop coefficients |
Section: | Management of turfgrass, thatch, soil and irrigation Other records with the "Management of turfgrass, thatch, soil and irrigation" Section |
Meeting Info.: | Cincinnati, Ohio: October 21-24, 2012 |
Source: | ASA, CSSA and SSSA Annual Meetings [2012]. 2012, p. 70835. |
Publishing Information: | Madison, Wisconsin: American Society of Agronomy and Crop Science Society of America and Soil Science Society of America |
# of Pages: | 1 |
Keywords: | TIC Keywords: Agrostis stolonifera; Cultivar evaluation; Evapotranspiration rate; Irrigation efficiency; Irrigation methods; Lolium perenne |
Abstract/Contents: | "Scheduling irrigation according to actual turfgrass evapotranspiration rates (ETa) reduces waste and increases irrigation efficiency. Crop coefficients (Kc values) are used in association with weather station reference ET (ET0) to predict ETa. Experimentally-derived Kc values need to be developed at the local level to ensure optimum turf function and effective irrigation efficiency. The objective of this study was to measure ETa and Kc values comparing golf species (creeping bentgrass, Agrostis stolonifera L. 'Memorial') maintained as green and fairway turf with sports grass species (Kentucky bluegrass, Poa pratensis L. 'Touchdown' and perennial ryegrass, Lolium perenne L. 'Exacta'). Reference ET0 values were computed using the FAO 56 equation. Studies were initiated in 2010 at the Joseph Troll Turf Research Center, South Deerfield, MA. Species main plots were arranged as a complete factorial with two nitrogen (N) levels, 98 and 196 kg N ha-1 yr-1, with four replicates arranged as a RCB. All species by N main plots were split according to two heights of cut (HOC) with sports grass maintained at 31.25 and 62.5 mm while golf main plots were mowed at 3.125 and 9.375 mm. Twenty-three daily ETa (using weighing lysimeters), ET0 and Kc values (calculated as ETa/ET0) were made during the summer months beginning in late June and ending late August in 2010 and 2011. Reference ET0 values were effective in predicting daily ETa accounting for 60% of the total variation. FAO 56 over estimated ETa in 2010 (Kc=0.95) and under estimated ETa in 2011 (Kc=1.15). Within the same species, HOC had no significant effect on ETa and Kcs. Daily ETa and Kcs increased with leaf area (leaf growth rate and HOC). In 2010 and 2011, summer Kcs were significantly lower with golf turf than sports grass averaging 0.90 and 1.10, respectively. Fertilizing in summer with 49 kg N ha-1 (42% as SRN) caused significantly higher ETa and Kcs on only 3 dates in 2010 and 2011. Two more years of field testing are planned." |
Language: | English |
References: | 0 |
See Also: | See also related article "Efficient irrigation for recreational turf in the cool-humid northeast: II. Summer rooting" ASA, CSSA and SSSA Annual Meetings [2012], 2012, p. 73650, R=213415.R=213415 |
Note: | This item is an abstract only |
ASA/CSSA/SSSA Citation (Crop Science-like – may be incomplete): | Ebdon, J., M. DaCosta, and J. Poro. 2012. Efficient irrigation for recreational turf in the cool-humid northeast: I. ET and crop coefficients. Int. Ann. Meet. p. 70835. |
Fastlink to access this record outside TGIF: | http://tic.msu.edu/tgif/flink/RECNO/213371 |
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Web URL(s) : | https://scisoc.confex.com/crops/2012am/webprogram/Paper70835.html Last checked: 11/21/2012 |
MSU catalog number: | TIC Vertical - Serials |
Find from within TIC: | Digitally in TIC by record number. |
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