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| Web URL(s): | http://archive.lib.msu.edu/tic/rpr/1994/Univ.%20of%20Nevada-Bowman.PDF
Last checked: 11/14/2013
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Material Type: | Manuscript |
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| Monographic Author(s): | Bowman, Daniel C. |
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| Monograph Title: | Characterization of Water Use Requirements and Gas Exchange of Buffalograss Turf: [1994 Annual Research Report], 1994. |
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| Publishing Information: | [Reno, Nevada]:[University of Nevada] |
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| # of Pages: | 12 |
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| Collation: | [12] pp. |
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| Abstract/Contents: | "Since irrigation accounts for nearly half of urban water use, considerable savings could be realized by planting turfgrasses with low water requirements. Buffalograss may be the ideal species for both water savings and aesthetics, but water use data are scarce and one can only speculate on water requirements. This study is generating crop coefficients for buffalograss and identifies intraspecific water use differences among a diverse selection of genotypes. A field project was installed at the UNR Valley Road Field Station to determine water use requirements of seventeen buffalograss genotypes representing a diverse genetic background. This project utilizes a line source water gradient in which buffalograss varieties are planted in strips down the gradient. Turf performance can be measured at any given irrigation amount, and minimum irrigation requirements are indicated by that point in the gradient beyond which the turf goes dormant or cannot survive. Mini-lysimeters (15 cm diameter, 30 cm depth and each with a drain hole and removable plug to stop drainage) were planted, four per genotype, and established in the greenhouse. Cores for the lysimeters were drilled in each plot 2 meters from the main irrigation line. These will be used to determine ET gravimetrically under non-limiting conditions. These lysimeters were used in a greenhouse experiment to determine instraspecific differences in water use rates. The results indicate that significant differences do exist in water use between buffalograss varieties, but the differences are relatively small. However, average water use rates are quite low (approximately half) in comparison to a similar experiment with tall fescue. The line source gradient was established in July, 1994, with irrigation scheduled based on ET (modified Penman) as determined with weather station data. Date on ET under non-limiting conditions, turf quality, canopy temperature, soil moisture, minimum water requirements, and plant water status were collected during 1994. The data demonstrate significant differences between genotypes for water use (crop coefficients ranged from 0.76 to 1.02) and turf quality. Canopy temperatures were relatively unaffected by drought until the end of the experiment, and then only increased at the very outer edge of the plots. Over the course of this experiment (31 days), the point demarcating the minimum irrigation required to prevent total dormancy corresponded to approximately 10-20% ET. It is apparent from this first year's data that buffalograss can produce an acceptable turf with deficit irrigation of 50-60% ET, at least a relatively short period of time. The experimental period will be extended to at least 10 weeks in 1995 to more severely stress the turf." |
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| Language: | English |
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| References: | 0 |
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| See Also: | See also related summary article "Characterization of water use requirements and gas exchange of buffalograss turf" 1994 Turfgrass Research Summary [USGA], 1994, p. 28-29, R=35155. R=35155 |
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| Note: | Also appears as pp. 00259-00270 in the USGA Turfgrass Research Committee Reporting Binders for 1994.
"Progress Report, November, 1994"
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
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Last checked: 11/14/2013
Requires: PDF Reader |
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