Full TGIF Record # 232955
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Web URL(s):http://archive.lib.msu.edu/tic/rpr/1992/Environmental/27767,%20U%20Nevada,%20Bowman,%20salinity.PDF
    Last checked: 11/20/2013
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Publication Type:
Material Type:Manuscript
Monographic Author(s):Bowman, Daniel C.; Miller, Wally W.; Devitt, Dale A.
Author Affiliation:Investigator, Dept. of Plant Science, Univ. of Nevada, Reno
Monograph Title:The Effect of Salinity on Nitrate Leaching from Turfgrass: [1992 Final Progress Report], 1992.
Publishing Information:Reno, Nevada: University of Nevada
# of Pages:16
Collation:[16] pp.
Abstract/Contents:"This project was initiated in March of 1991, and consists of both a field component (Las Vegas) and a greenhouse component (Reno) to examine the effects of saline irrigation water on nitrate leaching from, and nitrogen uptake by bermudagrass and tall fescue turf. Las Vegas: Nitrate leaching data were collected from April through September, 1992. Relatively large amounts of N were leached from all treatments during April, ranging from 3.4 to 11.4% of applied N. These high values were likely due to the large volumes of collected leachate, and possibly also to mineralization of N from organic matter. Data were collected during the same period on plant physiological response to salinity and water stress. The bermudagrass was overseeded in September, at which time the saline irrigation line was switched to fresh water. Salinity treatments will be imposed for a second year beginning next spring, and sampling will follow this year's procedure. Reno: Nitrate leaching, growth, and N use efficiency of bermudagrass and tall fescue turf have been followed for the past 9 months. The nitrate concentration on the leachate has remained generally very low, usually below 1 ppm N. Cumulative nitrate-N leached over the nine month period amounted to approximately 7 mg N/column for the tall fescue and 5.0 mg N/column for the bermudagrass, representing 0.6-1.5% and 0.4-1.3% of the applied N, respectively. There was still no clear and consistent effect of salinity on nitrate leaching. There was also no apparent effect of N rate on total amount of nitrate leached. The amount of N partitioned to leaf tissue and removed in clippings increased with increasing N application rate, but again, there was no effect of salinity. Average N allocation to leaf tissue (N use efficiency) ranged from 71-78% in the tall fescue and 84-88% in the bermudagrass. These data continue to support our previous reports that moderate salinity has very little effect on nitrogen dynamics in either turf system, and that the very efficient absorption of applied N minimizes the potential for nitrate leaching. Ammonium nitrate labeled with 15N was applied in September to determine the pattern of allocation of concurrently absorbed N. Tissue samples are being analyzed commercially at this time. A second greenhouse gas experiment is being initiated to examine the effects of leaching fraction and salinity on nitrate leaching from the two turf species. Tall fescue will be irrigated with water having added salt levels of 0, 20 and 40 meq/liter, while bermudagrass will be irrigated with 0, 40 and 80 meq/liter. Leaching fractions of 10, 30 and 50% will be imposed as a second factor. Nitrogen will be applied at 1# N/1000 ft2 (5 g N/m2). Data will be collected starting in April, 1993."
See Also:See also related summary article "The effect of salinity on nitrate leaching from turfgrass" 1992 Environmental Research Summary [USGA], 1992, p. 7-8, R=27767. R=27767
Note:Also appears as p. 00067 in the USGA Turfgrass Research Committee Reporting Binders for 1992.
"Climatic region: Warm Arid"
"USGA region: Western"
"Final 1992 Progress Report for USGA Sponsored Research Project"
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    Last checked: 11/20/2013
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