Nitrous oxide emissions from a bermudagrass pasture: Interseeded winter rye and poultry litter

Adequate use of manure in grasslands may constitute an economical means of manure disposal and an abundant source of nutrients for plants; however, excessive nitrogen (N) additions to these soils could create new environmental risks such as increasing nitrous oxide (N 2O) emissions. These potentiall...

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Bibliographic Details
Published in:Soil biology & biochemistry 2009-07, Vol.41 (7), p.1417-1424
Main Authors: Sauer, Thomas J., Compston, Scott R., West, Charles P., Hernandez-Ramirez, Guillermo, Gbur, Edward E., Parkin, Timothy B.
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
ammonia
Biochemistry and biology
Biological and medical sciences
cattle
Chemical, physicochemical, biochemical and biological properties
Cynodon dactylon
Fundamental and applied biological sciences. Psychology
gas emissions
Grazed bermudagrass pasture
grazing
Interseeded winter rye forage
nitrates
nitrogen
Nitrous oxide
pastures
Physics, chemistry, biochemistry and biology of agricultural and forest soils
Poultry litter
poultry manure
rain
rye
Secale cereale
silt loam soils
Soil nitrate
soil pore water
Soil science
soil temperature
spring
temperate soils
winter
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Summary:Adequate use of manure in grasslands may constitute an economical means of manure disposal and an abundant source of nutrients for plants; however, excessive nitrogen (N) additions to these soils could create new environmental risks such as increasing nitrous oxide (N 2O) emissions. These potentially adverse effects in grasslands may be mitigated by improved management practices. In pasture systems, the combined effects of poultry litter applications and interseeded rye ( Secale cereale L.) on N 2O emissions are still not well established. This study was conducted to estimate the magnitude of soil surface N 2O fluxes as affected by interseeded winter rye forage, annually spring-applied composted turkey litter as well as by weather and soil parameters. Fluxes were measured by vented chambers during 2 yr in a bermudagrass ( Cynodon dactylon [L.] Pers.) pasture in moderately well-drained Tonti gravelly silt loam (fine-loamy, active, mesic Typic Fragiudault) located in northwestern Arkansas, USA. During the 60 d following turkey litter applications, N 2O fluxes were frequently well correlated with soil nitrate (NO 3 −; r: up to 0.82, P's 
ISSN:0038-0717
1879-3428
DOI:10.1016/j.soilbio.2009.03.019