Nitrous oxide flux from a tea field amended with a large amount of nitrogen fertilizer and soil environmental factors controlling the flux

Tokuda, Shinichi; Hayatsu, Masahito

doi:10.1080/00380768.2004.10408490

Cited by 71 publications

(47 citation statements)

References 27 publications

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“…a certain degree of extensification and a proper use of organic fertilizers, may lead to CO 2 e emission reductions, which is consistent with the statement of Johnson et al [28] who also affirm that the proper N management can reduce N 2 O emissions, while similar conclusions were reported by Dalal et al [29], Robertson and Grace [30] and Monteny et al [31]. In addition, Tokuda and Hayatsu [32], Mori et al [33] and Zou et al [34] state that with the increasing use of chemical fertilizers and manure, a share of N 2 O emitted from soil also usually increases (i.e. field Table 2.…”

Section: Discussionsupporting

confidence: 81%

Environmental and economic aspects of Triticum aestivum L. and Avena sativa growing

et al. 2016

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This paper deals with the assessment of cultivation of bread wheat (Triticum aestivum L.) and oat (Avena sativa) grown in Central Europe within the conventional and organic farming systems in terms of greenhouse gas emissions and economic profitability. Organic farming may be one of the tools for mitigation of greenhouse gas emissions from agricultural production. In the context of crop production, cereals rank among the most commonly grown crops and therefore bread wheat and oat were chosen. The Climate change impact category was assessed within the simplified LCA method and the production of greenhouse gas emissions expressed in CO2e per the production unit was calculated. Economic balance of the cultivation of monitored cereals was compiled based on the yields, farm gate prices and costs. On its basis, the cultivation of wheat within the organic farming system appears to be the most profitable. From an environmental point of view, the emission load of the organic farming system is reduced by 8.04 % within the wheat production and by 15.46 % within the oat cultivation. Therefore, the organic farming system in the Czech Republic appears to be more environmentally friendly and economically efficient within the cereals production.

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Section: Discussionsupporting

confidence: 81%

Environmental and economic aspects of Triticum aestivum L. and Avena sativa growing

et al. 2016

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“…Similarly, our mean background NO emission from tea plantations is greater, relative to cereal grain croplands (0.2-0.9 kg N ha −1 yr −1 , Yao et al, 2013;Yan et al, 2015) and vegetable fields (0.2-0.8 kg N ha −1 yr −1 , Yao et al, 2015) in China. These comparisons highlight the characteristic of high background N 2 O and NO emissions from tea plantations, which is probably due to long-term heavy nitrogen fertilization and subsequent soil acidification (Tokuda and Hayatsu, 2004;Yamamoto et al, 2014). Soil acidity appears to be an important factor in affecting biotic and abiotic processes and consequently promoting nitrogen losses, such as enhancing N 2 O production ratios from nitrification and depressing the conversion of N 2 O to N 2 in denitrification (Zhu et al, 2011) as well as inducing chemodenitrification for NO production (Venterea et al, 2003;Medinets et al, 2015).…”

Section: Background N 2 O and No Emissions And Direct Emission Factormentioning

confidence: 99%

“…For improving the yield and quality of tea leaves, therefore, large amounts of nitrogen fertilizer are increasingly applied by tea farmers. For instance, the application rates of nitrogen fertilizer to tea plantations have been as high as 450-1200 kg N ha −1 yr −1 , which significantly surpasses the recommended rate of 250-375 kg N ha −1 yr −1 for high tea yields (Tokuda and Hayatsu, 2004;Hirono and Nonaka, 2012;Fu et al, 2012;Zhu et al, 2014). Not surprisingly, such high nitrogen inputs can easily induce excess residual nitrogen and acidification of soil; both influence the nitrogen cycle of tea fields in which a great deal of nitrogenous gases are produced (Jumadi et al, 2008;Zhu et al, 2014) .…”

Section: Introductionmentioning

confidence: 99%

Organically fertilized tea plantation stimulates N<sub>2</sub>O emissions and lowers NO fluxes in subtropical China

et al. 2015

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Abstract. Tea plantations are rapidly expanding in China and other countries in the tropical and subtropical zones, but so far there are very few studies including direct measurements of nitrogenous gas fluxes from tea plantations. On the basis of 2-year field measurements from 2012 to 2014, we provided an insight into the assessment of annual nitrous oxide (N 2 O) and nitric oxide (NO) fluxes from Chinese subtropical tea plantations under three practices of conventional urea application, alternative oilcake incorporation and no nitrogen fertilization. Clearly, the N 2 O and NO fluxes exhibited large intra-and inter-annual variations, and furthermore, their temporal variability could be well described by a combination of soil environmental factors including soil mineral N, water-filled pore space and temperature, based on a revised "hole-in-the-pipe" model. Averaged over a 2-year study, annual background N 2 O and NO emissions were approximately 4.0 and 1.6 kg N ha −1 yr −1 , respectively. Compared to no nitrogen fertilization, both urea and oilcake application significantly stimulated annual N 2 O and NO emissions, amounting to 14.4-32.7 kg N 2 O-N ha −1 yr −1 and at least 12.3-19.4 kg NO-N ha −1 yr −1 , respectively. In comparison with conventional urea treatment, on average, the application of organic fertilizer significantly increased N 2 O emission by 71 % but decreased NO emission by 22 %. Although the magnitude of N 2 O and NO fluxes was substantially influenced by the source of N, the annual direct emission factors of N fertilizer were estimated to be 2.8-5.9, 2.7-4.0 and 6.8-9.1 % for N 2 O, NO and N 2 O+NO, respectively, which are significantly higher than those defaults for global upland croplands. This indicated that the rarely determined N 2 O and NO formation appeared to be a significant pathway in the nitrogen cycle of tea plantations, which are a potential source of national nitrogenous gases inventory.

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“…The annual N application rate has been as high as 450-1000 kg N ha −1 in tea plantations Hayatsu 2001, 2004;Li et al 2013), much higher than those applied in intensive paddy field cultivation (Ju et al 2009). Fertilizer-induced N 2 O emissions in tea plantations have been shown to be much higher than levels observed in upland rice paddy fields (Tokuda and Hayatsu 2004;Akiyama et al 2006;Han et al 2013). Previous studies have suggested that soil acidification as a result of long-term heavy application of N fertilizer could be responsible for enhanced N 2 O emissions from tea soil (Tokuda and Hayatsu 2001;Tokuda and Hayatsu 2004).…”

Section: Introductionmentioning

confidence: 97%

“…Indeed, the 100-year global warming potential of N 2 O is approximately 298 times that of CO 2 (IPCC 2007). Tea plantations, which cultivate an intensively managed cash crop, are known to contribute significantly to global N 2 O emissions (Tokuda and Hayatsu 2004;Li et al 2013). On a global scale, tea plantations cover about three million hectares of the world's arable land, 50 % of which is located in China (Li et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Mechanistic insights into the effects of N fertilizer application on N2O-emission pathways in acidic soil of a tea plantation

et al. 2014

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Background and aims Long-term nitrogen (N) fertilization has been shown to stimulate N 2 O emissions from acidic soil in tea plantations. However, the potential mechanism behind this stimulation remains unclear. We aimed to investigate the effects of 6 years of fertilizer application on N 2 O emission pathways and the N 2 O emission ratio from heterotrophic and autotrophic nitrification in tea plantation. Methods We performed a 15 N-tracing experiment under 40 and 60 % water-holding capacity (WHC) to investigate the effects of 6 years of fertilizer application on N 2 O-emission pathways and emission ratios from heterotrophic and autotrophic nitrification in soil from tea plantations. Results Six years of fertilizer application stimulated both heterotrophic and autotrophic nitrification, particularly under conditions of higher soil moisture. Autotrophic nitrification was the predominant pathway for N 2 O emission in tea soils, being responsible for 66.7-75.9 % and 50.4-56.9 % of N 2 O emission in unfertilized and fertilized soils, respectively. Fertilizer application significantly increased the contribution of denitrification to N 2 O emission (10.5-35.7 %), independent of soil moisture conditions, which could be due to a fertilizerinduced reduction in soil pH Fertilizer application and a subsequent reduction in pH resulted in a 3-4 and 8-9 fold increase in the ratio of N 2 O emissions from heterotrophic nitrification and autotrophic nitrification, respectively. Conclusions The increase in N 2 O emission following N fertilizer application was attributed to increased heterotrophic and autotrophic nitrification rates and an increased ratio of N 2 O emission from heterotrophic and autotrophic nitrification. Our results suggest that pH was a critical factor regulating the ratio of N 2 O emission from heterotrophic and autotrophic nitrification and thus controlling N 2 O emission from the tea soils studied. Plant Soil

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Nitrous oxide flux from a tea field amended with a large amount of nitrogen fertilizer and soil environmental factors controlling the flux

Cited by 71 publications

References 27 publications

Environmental and economic aspects of Triticum aestivum L. and Avena sativa growing

Environmental and economic aspects of Triticum aestivum L. and Avena sativa growing

Organically fertilized tea plantation stimulates N<sub>2</sub>O emissions and lowers NO fluxes in subtropical China

Mechanistic insights into the effects of N fertilizer application on N2O-emission pathways in acidic soil of a tea plantation

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Nitrous oxide flux from a tea field amended with a large amount of nitrogen fertilizer and soil environmental factors controlling the flux

Cited by 71 publications

References 27 publications

Environmental and economic aspects of Triticum aestivum L. and Avena sativa growing

Environmental and economic aspects of Triticum aestivum L. and Avena sativa growing

Organically fertilized tea plantation stimulates N&lt;sub&gt;2&lt;/sub&gt;O emissions and lowers NO fluxes in subtropical China

Mechanistic insights into the effects of N fertilizer application on N2O-emission pathways in acidic soil of a tea plantation

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Organically fertilized tea plantation stimulates N<sub>2</sub>O emissions and lowers NO fluxes in subtropical China