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ARS Home » Northeast Area » University Park, Pennsylvania » Pasture Systems & Watershed Management Research » Research » Publications at this Location » Publication #250700
Title: Creeping bentgrass response to a stabilized amine form of nitrogen fertilizer

Author
item ZHU, QING - Pennsylvania State University
item SCHLOSSBERG, MAXIMUM - Pennsylvania State University
item Bryant, Ray

Submitted to: World Congress of Soil Science
Publication Type: Proceedings
Publication Acceptance Date: 3/2/2010
Publication Date: 8/1/2010
Citation: Qing Zhu, Maxim Schlossberg, Ray Bryant, and John Schmidt. 2010. Creeping bentgrass response to a stabilized amine form of nitrogen fertilizer. 19th World Congress of Soil Science. July 31 – Aug. 6, 2010. Brisbane, Australia. 2010 CDROM.

Interpretive Summary:

Technical Abstract: PiNT+potassium (PiNT+K) is a newly developed amine form of nitrogen (N) fertilizer that is stabilized by reaction with the potassium cation. The influence of PiNT+K and an analog fertilizer (KNO3 and NH4NO3) on the quality of creeping bentgrass were compared at different N rates (0, 25, 37.5, and 50 kg N ha-1). At the same N rate, the normalized difference vegetation index (NDVI) of the PiNT+K treatments was 2-3% higher than the analog treatments, while the dark green color index (DGCI) was 4-7% higher. Fertilizer burn (osmotic desiccation) was observed on plots treated with the analog fertilizer, but treatments with PiNT+K appeared safe from osmotic desiccation even at high N rates. The application N rate of 37.5 kg N ha-1 of PiNT+K outperformed the analog fertilizer at 50 kg N ha-1 when the quality of creeping bentgrass, turfgrass management, and N use efficiency were considered. The PiNT+K treatment yielded better quality as measured by NDVI and DGCI, yielded similar above-ground biomass, and had less unused N (N application – N uptake) in comparison to the analog fertilizer.