TY - JOUR
T1 - Comparing closed chamber measures of ammonia volatilization from kentucky bluegrass fertilized by granular urea
AU - Schlossberg, Maxim J.
AU - McGraw, Benjamin A.
AU - Hivner, Kyle R.
N1 - Funding Information:
1 This work was supported by the USDA National Institute of Food and Agriculture, Hatch projects 1006804 and 0222520. Additional funding was provided by The Pennsylvania Turfgrass Council. The authors thank Mr. Ryan Sebring, Dr. John Spargo, and the Valentine Turfgrass Research Center staff for their technical assistance.
Funding Information:
1Received for publication March 30, 2018; in revised form July 17, 2018. This work was supported by the USDA National Institute of Food and Agriculture, Hatch projects 1006804 and 0222520. Additional funding was provided by The Pennsylvania Turfgrass Council. The authors thank Mr. Ryan Sebring, Dr. John Spargo, and the Valentine Turfgrass Research Center staff for their technical assistance. 2Current address: Dept. of Plant Science, 116 ASI Bldg., Penn State University, University Park, PA 16802. Corresponding author. Email address: [email protected]. 3Center for Turfgrass Science, Dept. of Plant Science, The Pennsylvania State University, University Park, PA 16802.
Publisher Copyright:
© 2018 Horticultural Research Institute.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2018/9
Y1 - 2018/9
N2 - Easy handling and low unit N cost make prilled urea (46-0-0) a popular fertilizer. While incomplete recovery of granular urea applications by turfgrass is documented, practical guidance for small-plot field assessment of ammonia (NH3) volatilization remains limited. Our objectives were to (i) develop a method for field-implementation of closed flux/dynamic chambers to measure ammonia emission over a 3-day period following granular urea application to turfgrass, and (ii) infer the significance of said measures to levels arising from simultaneous static-chamber measures. A Kentucky bluegrass (Poa pratensis L. ‘Midnight’) lawn was treated with granular urea-N at a rate of 0 or 43 kg·ha1 (38 lb/A) twice in both 2014 and 2015. Flux chamber measures of mean ammonia volatilization from urea-N fertilizer applied 3 days previous exceeded simultaneous static chamber measures by a factor of 17. Relative to static, the closed dynamic/flux chamber system described affords a more precise and efficient method for measuring ammonia volatilization from small field plots. Furthermore, over a 3-day period of dry conditions and ambient temperatures fluctuating between 10 and 31 C (50 and 88 F), as much as 23.1% of a granular urea application broadcast over a Kentucky bluegrass lawn can be volatilized as ammonia.
AB - Easy handling and low unit N cost make prilled urea (46-0-0) a popular fertilizer. While incomplete recovery of granular urea applications by turfgrass is documented, practical guidance for small-plot field assessment of ammonia (NH3) volatilization remains limited. Our objectives were to (i) develop a method for field-implementation of closed flux/dynamic chambers to measure ammonia emission over a 3-day period following granular urea application to turfgrass, and (ii) infer the significance of said measures to levels arising from simultaneous static-chamber measures. A Kentucky bluegrass (Poa pratensis L. ‘Midnight’) lawn was treated with granular urea-N at a rate of 0 or 43 kg·ha1 (38 lb/A) twice in both 2014 and 2015. Flux chamber measures of mean ammonia volatilization from urea-N fertilizer applied 3 days previous exceeded simultaneous static chamber measures by a factor of 17. Relative to static, the closed dynamic/flux chamber system described affords a more precise and efficient method for measuring ammonia volatilization from small field plots. Furthermore, over a 3-day period of dry conditions and ambient temperatures fluctuating between 10 and 31 C (50 and 88 F), as much as 23.1% of a granular urea application broadcast over a Kentucky bluegrass lawn can be volatilized as ammonia.
UR - https://www.scopus.com/pages/publications/85055252935
UR - https://www.scopus.com/pages/publications/85055252935#tab=citedBy
U2 - 10.24266/0738-2898-36.3.85
DO - 10.24266/0738-2898-36.3.85
M3 - Article
AN - SCOPUS:85055252935
SN - 0738-2898
VL - 36
SP - 85
EP - 91
JO - Journal of Environmental Horticulture
JF - Journal of Environmental Horticulture
IS - 3
ER -
