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231224s2014 xx |||||o 00| ||eng c |
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7 |
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|a 10.1111/gcb.12413
|2 doi
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|a pubmed24n0772.xml
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|a (DE-627)NLM231602405
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|a (NLM)24115565
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|a DE-627
|b ger
|c DE-627
|e rakwb
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| 041 |
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|a eng
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| 100 |
1 |
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|a Pittelkow, Cameron M
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Optimizing rice yields while minimizing yield-scaled global warming potential
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|c 2014
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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| 500 |
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|a Date Completed 29.12.2014
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|a Date Revised 19.11.2015
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2013 John Wiley & Sons Ltd.
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|a To meet growing global food demand with limited land and reduced environmental impact, agricultural greenhouse gas (GHG) emissions are increasingly evaluated with respect to crop productivity, i.e., on a yield-scaled as opposed to area basis. Here, we compiled available field data on CH4 and N2 O emissions from rice production systems to test the hypothesis that in response to fertilizer nitrogen (N) addition, yield-scaled global warming potential (GWP) will be minimized at N rates that maximize yields. Within each study, yield N surplus was calculated to estimate deficit or excess N application rates with respect to the optimal N rate (defined as the N rate at which maximum yield was achieved). Relationships between yield N surplus and GHG emissions were assessed using linear and nonlinear mixed-effects models. Results indicate that yields increased in response to increasing N surplus when moving from deficit to optimal N rates. At N rates contributing to a yield N surplus, N2 O and yield-scaled N2 O emissions increased exponentially. In contrast, CH4 emissions were not impacted by N inputs. Accordingly, yield-scaled CH4 emissions decreased with N addition. Overall, yield-scaled GWP was minimized at optimal N rates, decreasing by 21% compared to treatments without N addition. These results are unique compared to aerobic cropping systems in which N2 O emissions are the primary contributor to GWP, meaning yield-scaled GWP may not necessarily decrease for aerobic crops when yields are optimized by N fertilizer addition. Balancing gains in agricultural productivity with climate change concerns, this work supports the concept that high rice yields can be achieved with minimal yield-scaled GWP through optimal N application rates. Moreover, additional improvements in N use efficiency may further reduce yield-scaled GWP, thereby strengthening the economic and environmental sustainability of rice systems
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Review
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| 650 |
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|a CH4
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| 650 |
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4 |
|a GHG emissions
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| 650 |
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4 |
|a N2O
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| 650 |
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4 |
|a greenhouse gas intensity
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| 650 |
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|a rice yield
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| 650 |
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|a synthetic N fertilizer
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| 650 |
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|a Air Pollutants
|2 NLM
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| 650 |
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|a Fertilizers
|2 NLM
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| 650 |
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|a Gases
|2 NLM
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| 650 |
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|a Nitrous Oxide
|2 NLM
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| 650 |
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|a K50XQU1029
|2 NLM
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| 650 |
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|a Nitrogen
|2 NLM
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| 650 |
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|a N762921K75
|2 NLM
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| 650 |
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|a Methane
|2 NLM
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| 650 |
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7 |
|a OP0UW79H66
|2 NLM
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| 700 |
1 |
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|a Adviento-Borbe, Maria A
|e verfasserin
|4 aut
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| 700 |
1 |
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|a van Kessel, Chris
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Hill, James E
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Linquist, Bruce A
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Global change biology
|d 1999
|g 20(2014), 5 vom: 11. Mai, Seite 1382-93
|w (DE-627)NLM098239996
|x 1365-2486
|7 nnns
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| 773 |
1 |
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|g volume:20
|g year:2014
|g number:5
|g day:11
|g month:05
|g pages:1382-93
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| 856 |
4 |
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|u http://dx.doi.org/10.1111/gcb.12413
|3 Volltext
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|d 20
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|e 5
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|h 1382-93
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