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000018210 0247_ $$2DOI$$a10.1002/jpln.201000123
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000018210 041__ $$aeng
000018210 082__ $$a570
000018210 084__ $$2WoS$$aAgronomy
000018210 084__ $$2WoS$$aPlant Sciences
000018210 084__ $$2WoS$$aSoil Science
000018210 1001_ $$0P:(DE-HGF)0$$aPfab, H.$$b0
000018210 245__ $$aN2O fluxes from a Haplic Luvisol under intensive production of lettuce and cauliflower as affected by different N-fertilization strategies
000018210 260__ $$aWeinheim$$bWiley-VCH$$c2011
000018210 300__ $$a545 - 553
000018210 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article
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000018210 440_0 $$09183$$aJournal of Plant Nutrition and Soil Science - Zeitschrift für Pflanzenernährung und Bodenkunde$$v174$$x1436-8730$$y4
000018210 500__ $$3POF3_Assignment on 2016-02-29
000018210 500__ $$aThis study was financed by the Deutsche Bundesstiftung Umwelt (AZ 25420). We further thank Heidi Zimmermann, Hinrich Bremer, Maria Ruckwied, and the laboratory staff of the Department of Plant Nutrition. We also thank University's workshop for technical assistance, as well as Hans Bucher, Rudolf Schulz, Christa Schollhammer, Tobias Hartmann, our student assistants and the crew of the experimental farm "Heidfeldhof" for their help.
000018210 520__ $$aVegetable-production systems often show high soil mineral-N contents and, thus, are potential sources for the release of the climate-relevant trace gas N2O from soils. Despite numerous investigations on N2O fluxes, information on the impact of vegetable-production systems on N2O emissions in regions with winter frost is still rare. This present study aimed at measuring the annual N2O emissions and the total yield of a lettuce-cauliflower rotation at different fertilization rates on a Haplic Luvisol in a region exposed to winter frost (S Germany). We measured N2O emissions from plots fertilized with 0, 319, 401, and 528 kg N ha(-1) (where the latter three amounts represented a strongly reduced N-fertilization strategy, a target value system [TVS] in Germany, and the N amount fertilized under good agricultural practices). The N2O release from the treatments was 2.3, 5.7, 8.8, and 10.6 kg N2O-N ha(-1) y(-1), respectively. The corresponding emission factors calculated on the basis of the total N input ranged between 1.3% and 1.6%. Winter emission accounted for 45% of the annual emissions, and a major part occurred after the incorporation of cauliflower residues. The annual N2O emission was positively correlated with the nitrate content of the top soil (0-25 cm) and with the N surpluses of the N balance. Reducing the amount of N fertilizer applied significantly reduced N2O fluxes. Since there was no significant effect on yields if fertilization was reduced from 528 kg N ha(-1) according to "good agricultural practice" to 401 kg N ha(-1) determined by the TVS, we recommend this optimized fertilization strategy.
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000018210 65320 $$2Author$$aN2O emission
000018210 65320 $$2Author$$aN fertilization
000018210 65320 $$2Author$$acrop residues
000018210 65320 $$2Author$$afreeze-thaw
000018210 65320 $$2Author$$aemission factor
000018210 65320 $$2Author$$ayield
000018210 650_7 $$2WoSType$$aJ
000018210 7001_ $$0P:(DE-HGF)0$$aPalmer, I.$$b1
000018210 7001_ $$0P:(DE-HGF)0$$aBuegger, F.$$b2
000018210 7001_ $$0P:(DE-Juel1)VDB99792$$aFiedler, S.$$b3$$uFZJ
000018210 7001_ $$0P:(DE-HGF)0$$aMüller, T.$$b4
000018210 7001_ $$0P:(DE-HGF)0$$aRuser, R.$$b5
000018210 773__ $$0PERI:(DE-600)1481142-x$$a10.1002/jpln.201000123$$gVol. 174, p. 545 - 553$$p545 - 553$$q174<545 - 553$$tJournal of plant nutrition and soil science$$v174$$x1436-8730$$y2011
000018210 8567_ $$uhttp://dx.doi.org/10.1002/jpln.201000123
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000018210 915__ $$0StatID:(DE-HGF)0010$$aJCR/ISI refereed
000018210 9141_ $$y2011
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