NDLI: The fate of slurry-N fractions in herbage and soil during two growing seasons following application

Content Provider	Springer Nature Link
Author	Hoekstra, N. J. Lalor, S. T. J. Richards, K. G. O’Hea, N. Dungait, J. A. J. Schulte, R. P. O. Schmidt, O.
Copyright Year	2010
Abstract	Farmers are under increasing pressure to use slurry-nutrients more efficiently in order to maximise crop utilisation and minimise losses to the environment. The objective of this field experiment was to quantify the fate of three N fractions (urine-N [U], rapid faecal-N [FR] and slow faecal-N [FS]) from cattle slurry in herbage and soil. The recovery of the three slurry-N fractions was measured in the first and second year after application on a permanent grassland in Ireland. Urine and faeces were collected from cows fed with $^{15}$N-labelled herbage, or unlabelled herbage with added $^{15}$N-labelled urea and these were recombined to produce differentially labelled experimental slurries. Slurries were applied to plots, and $^{15}$N-enrichments of the herbage and three soil layers were determined. The initial recovery of $^{15}$N (6 weeks after application) in herbage was 18%, 13%, 2%, while the residual recovery (12–63 weeks) was 4%, 6% and 7% for U, FR and FS, respectively. The total slurry-N recovery in the plant-soil system was estimated to range from 45% for urine-N to 72% for faecal-N. These results increase our mechanistic understanding of slurry-N dynamics in soil-plant systems and will inform models used to predict the fate of cattle slurry applied to grassland.
Starting Page	83
Ending Page	96
Page Count	14
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	342
Issue Number	1-2
e-ISSN	15735036
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-12-04
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	$^{15}$N stable isotope tracer Grassland Cattle slurry Residual nitrogen recovery Faecal-N Urine-N Ecology Plant Physiology Soil Science & Conservation Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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