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Published online 31 May 2006
Published in J Environ Qual 35:973-981 (2006)
DOI: 10.2134/jeq2005.0320
© 2006 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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3,4-Dimethylpyrazol Phosphate Effect on Nitrous Oxide, Nitric Oxide, Ammonia, and Carbon Dioxide Emissions from Grasslands

S. Menéndeza,*, P. Merinob, M. Pintob, C. González-Muruaa and J. M. Estavilloa

a Department of Plant Biology and Ecology, University of the Basque Country, Apdo. 644, E-48080 Bilbao, Bizkaia, Spain
b Basque Institute for Agricultural Research and Development, NEIKER. Bo Berreaga 1. E-48160 Derio, Bizkaia, Spain


Figure 1
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  		Fig. 1. Ammonia volatilization rates measured during the first 110 h following slurry and mineral fertilizer applications. ({blacktriangleup}) Control, ({blacksquare}) ammonium sulfate nitrate, ({square}) ENTEC, (•) slurry, and ({circ}) slurry with 3,4-dimethylpyrazol phosphate (DMPP). The vertical bars indicate LSD at 0.05 between treatments for each sampling time.

 

Figure 2
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  		Fig. 2. Nitrous oxide (A) and nitric oxide (B) emission rates and water filled pore space (WFPS) and soil temperature (C). ({blacktriangleup}) Control, ({blacksquare}) Ammonium sulfate nitrate, ({square}) ENTEC, (•) slurry, ({circ}) slurry with 3,4-dimethylpyrazol phosphate (DMPP), (+) soil temperature at the 10-cm depth, ({diamondsuit}) WFPS in the control and mineral fertilizer treatments (0- to 10-cm depth), and ({diamond}) WFPS in the slurry treatments (0- to 10-cm depth). The vertical bars indicate LSD at 0.05 between treatments for each sampling time.

 

Figure 3
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  		Fig. 3. Effect of water filled pore space (WFPS) on the NO to N2O ratio. ({blacktriangleup}) Control (C), ({blacksquare}) ammonium sulfate nitrate (M), ({square}) ENTEC (M + 3,4-dimethylpyrazol phosphate [DMPP]), (•) slurry (S), ({circ}) slurry with DMPP (S + DMPP).

 

Figure 4
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  		Fig. 4. Carbon dioxide emission rates. ({blacktriangleup}) Control, ({blacksquare}) ammonium sulfate nitrate, ({square}) ENTEC, (•) slurry, ({circ}) slurry with 3,4-dimethylpyrazol phosphate (DMPP). The vertical bars indicate LSD at 0.05 between treatments for each sampling time.

 




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The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education		 Vadose Zone Journal
Soil Science Society of America Journal Journal of Plant Registrations The Plant Genome
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