In:
Global Change Biology, Wiley, Vol. 18, No. 8 ( 2012-08), p. 2546-2554
Abstract:
A recent study (Wolf et al ., 2010) suggests that short—lived pulses of N 2 O emission during spring thaw dominate the annual N 2 O budget and that grazing decreases N 2 O emissions during the spring thaw. To verify this we conducted year—round N 2 O flux measurements from June 2010 to May 2011 in Tianshan alpine grassland in central Asia. No pulse emissions of N 2 O were found at grazing management sites and nitrogen addition sites during the spring thaw. The contribution of the spring thaw to the total annual N 2 O budget was small and accounted for only 6.6% of the annual fluxes, with winter emissions accounting for 16.7% and growing season emissions accounting for 76.7%. The difference in N 2 O emissions attributable to grazing management was not significant ( P 〉 0.05). Nitrogen input tended to increase N 2 O emissions at N addition sites during the grass growing season compared with those at unfertilized sites. N 2 O fluxes showed a significant correlation with air temperature and also with both soil temperature and soil water content at 10 cm depth.
Type of Medium:
Online Resource
ISSN:
1354-1013
,
1365-2486
DOI:
10.1111/gcb.2012.18.issue-8
DOI:
10.1111/j.1365-2486.2012.02704.x
Language:
English
Publisher:
Wiley
Publication Date:
2012
detail.hit.zdb_id:
2020313-5
SSG:
12
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