Full TGIF Record # 137017
Item 1 of 1
Publication Type:
i
Refereed
Author(s):Magni, S.; Foschi, L.; Piccotino, D.; Miele, S.
Author Affiliation:Department of Agronomy and Agroecosystem Management, University of Pisa, Italy
Title:Nitrogen availability of different slow release fertilizers as determined by incubation in a sand based growing medium
Section:Volunteer presentations
Other records with the "Volunteer presentations" Section
Meeting Info.:19-20 May 2008: Pisa Italy
Source:1st European Turfgrass Society Conference Proceedings. Vol. 1, May 2008, p. 121-122.
# of Pages:2
Publishing Information:Pisa, Italy: European Turfgrass Society
Keywords:TIC Keywords: Nitrogen availability; Slow-release fertilizers; Mineralization; Nitrification; Methylene urea; Ammonium; Biodegradation; Sandy soils
Abstract/Contents:Presents a study conducted to "determine the release of plant available nitrogen from different polymeric sources by a laboratory incubation method where the conditions occuring in a newly constructed sand-based growing medium are reproduced." Details methods and materials used in the study, stating that "in order to test products with different expected release patterns...three experimental products...differening for their methyleneurea polymerization degree, were used." Lists treatments used in the study, including long chain methyleneurea (LCM) 38.8% nitrogen (N); intermediate chain methyleneurea (ICM) 39.4% N; and short chain methyleneurea (SCM) 39.2% N. States that "a commerical product (Azolon Medium, AM, by NuGro, 38.0% N) and a control without fertilization were also included in the trial." Reports that "when incubated at 30°C [Celsius], soils with a mineralization rate of lactic casein between 50 and 70% are rated as 'low in biological fertility'...At the lower temperature adopted in the trial (25°C), a recorded mineralization rate of lactic casein of 29% in six week incubaction...confirmed the expected low biological fertility of the growing medium used...The partial recovery of N in this study could be explained by volatilisation [volatilization] and denitrification losses, and by the leaching occurring for intact water-soluble methyleneurea during the first weeks of incubation." Concludes that "despite the low biological fertility of a sand-peat growing medium, the release of inorganic nitrogen observed from different slow release sources was similar to that reported for natural soil in similar incubation experiments. The nitrogen availability of polymeric nitrogen sources could therefore be unaffected by the application on sand based rootzone media even when newly constructed. Furthermore the use of a sand growing medium for fertilizers incubation studies could make results independent of many of the variables encountered when using soils."
ISBN-13:9788890207648
Language:English
References:7
Note:Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Magni, S., L. Foschi, D. Piccotino, and S. Miele. 2008. Nitrogen availability of different slow release fertilizers as determined by incubation in a sand based growing medium. Eur. Turfgrass Soc. Conf. Proc. 1:p. 121-122.
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