Temporal variations in nitrous oxide fluxes from urine-affected grassland

Williams, D.; Ineson, Phil; Coward, P.A.

doi:10.1016/s0038-0717(98)00186-2

Cited by 93 publications

(57 citation statements)

References 34 publications

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“…The daily fluctuation of N 2 O emissions in soil amended with C and N in the present study is roughly in agreement with the results obtained under other conditions (e.g., Williams et al 1999, Hyde et al 2005. Diurnal cycles of N 2 O emissions were also found in soil monoliths transferred to a greenhouse, with maxima occurring at night (Thomson et al 1997), and were associated with diurnal cycles in soil temperature (Smith et al 1998).…”

Section: Discussionsupporting

confidence: 93%

Diurnal fluxes of CO2 and N2O from cattle-impacted soil and implications for emission estimates

Šimek¹,

Brůček²,

Hynšt³

2010

PLANT SOIL ENVIRON

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Short-term diurnal changes in emissions of CO 2 and N 2 O were determined in a cattle overwintering area during three specific periods of the year. Production of both N 2 O and CO 2 , as determined with gas chambers buried in soil and spatially distributed changed rapidly, and the general course of fluxes of the two gases was different. CO 2 emissions were basically controlled by temperature, and most gas chambers showed the same trends in CO 2 flux, indicating low spatial heterogeneity. In contrast, N 2 O emissions were much more spatially heterogeneous and each chamber had its own time course of emission; therefore, the relationship between flux and temperature was more complicated for N 2 O than CO 2 . For estimating gas emissions over long periods, we strongly recommend the use of frequent emission measurements during periods of high gas fluxes.

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Section: Discussionsupporting

confidence: 93%

Diurnal fluxes of CO2 and N2O from cattle-impacted soil and implications for emission estimates

Šimek¹,

Brůček²,

Hynšt³

2010

PLANT SOIL ENVIRON

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“…Generally, the subtropical climate is characterized by the hot-humid season from April through September and the cool-dry season from October through March every year, leading to significant seasonal variations in soil environmental factors (Lin et al, 2010). Driven by the seasonality of soil temperature, WFPS, NH contents, the N 2 O and NO fluxes showed large temporal variations (Skiba et al, 1998;Williams et al, 1999;Yan et al, 2015) which were significantly higher during the teagrowing season than in winter in this study (Fig. 3).…”

Section: Intra-and Inter-annual Variations Of N 2 O and No Fluxes Andmentioning

confidence: 55%

Organically fertilized tea plantation stimulates N2O 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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“…On an ecosystem level grasslands are often regarded as a significant source of N 2 O (Williams et al 1999 Thirdly, soil moisture differences may contribute to the difference in N 2 O emissions between the plant communities. Soil moisture is an important factor controlling N 2 O emissions (Du 2006).…”

Section: Discussionmentioning

confidence: 99%

“…Because grasslands occupy a large proportion of terrestrial ecosystems in the globe (Adams et al 1990), numerous studies have been conducted in grassland ecosystems for a better understanding of N 2 O emissions. It shows that grasslands are a source of N 2 O (Pei et al 2004;Williams et al 1999;Xu-Ri et al 2003) and often exhibit higher emission rates than arable and forest soils (Oenema et al 1998). Meanwhile, evidence shows that soil moisture (Bouwman 1996;Del Prado et al 2006;Du 2006;Li et al 2004), temperature (Bouwman 1996;Du 2006) and grazing (Velthof and Oenema 1997) as well as N fertilization (Del Prado et al 2006;Stehfest and Bouwman 2006;Velthof and Oenema 1997) have a great impact on N 2 O emissions from grasslands.…”

Section: Introductionmentioning

confidence: 99%

Nitrous oxide emissions from two alpine meadows in the Qinghai–Tibetan Plateau

Cui²,

et al. 2008

Plant Soil

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Temporal variations in nitrous oxide fluxes from urine-affected grassland

Cited by 93 publications

References 34 publications

Diurnal fluxes of CO<sub>2</sub> and N<sub>2</sub>O from cattle-impacted soil and implications for emission estimates

Diurnal fluxes of CO<sub>2</sub> and N<sub>2</sub>O from cattle-impacted soil and implications for emission estimates

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

Nitrous oxide emissions from two alpine meadows in the Qinghai–Tibetan Plateau

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Temporal variations in nitrous oxide fluxes from urine-affected grassland

Cited by 93 publications

References 34 publications

Diurnal fluxes of CO<sub>2</sub> and N<sub>2</sub>O from cattle-impacted soil and implications for emission estimates

Diurnal fluxes of CO<sub>2</sub> and N<sub>2</sub>O from cattle-impacted soil and implications for emission estimates

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

Nitrous oxide emissions from two alpine meadows in the Qinghai–Tibetan Plateau

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