Land-use type and temperature affect gross nitrogen transformation rates in Chinese and Canadian soils

Lang, Man; Cai, Zucong; Mary, Bruno; Hao, Xiying; Chang, Scott X.

doi:10.1007/s11104-010-0389-z

Cited by 56 publications

(43 citation statements)

References 46 publications

(71 reference statements)

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“…The relationships between soil pH and gross N transformations have been scarcely studied (Cookson et al 2007;Lang et al 2010), and N reactions, as microbially mediated processes, are expected to be influenced by pH (Cheng et al 2013). We found positive strong correlations between soil pH and gross m and gross ia, as Cheng et al (2013) reported; however, contrary to these authors, we observed moderately negative correlations of soil pH with gross kn and gross in.…”

Section: Discussioncontrasting

confidence: 74%

“…Although weak relations have also been reported (Gómez-Rey et al 2012), the soil C and N pools are considered to be important controlling factors of gross N transformations (Booth et al 2005;Lang et al 2010;Magill and Aber 2000), with which they showed moderate to strong correlations in our plots. Nevertheless, as encountered for soil pH and likely by the same reasons, neither C nor N content were included in the best multiple regression models for the gross N rates.…”

Section: Discussioncontrasting

confidence: 60%

“…Several biotic and abiotic factors are related with soil gross N transformations (Booth et al 2005;Cookson et al 2007;Gómez-Rey et al 2012;Lang et al 2010), and many of them are affected by fires (Certini 2005). Consequently, Wang et al (2014) highlighted the need for more comprehensive studies with soil and ecological characterisation to improve the knowledge about the effect of fires on soil gross N transformations and N cycling.…”

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confidence: 99%

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Soil gross N transformation rates after a wildfire and straw mulch application for burned soil emergency stabilisation

Gómez-Rey

González-Prieto

2015

Biol Fertil Soils

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Effects of fire and post-fire mulching for soil protection on N transformations were evaluated in the laboratory 4, 8 and 12 months after a wildfire in the 0-2-cm layer of a burned soil without (BS) or with straw mulch (BSM) and an unburned soil (US). The relationships between the gross N rates calculated with the FLUAZ model (Mary et al. 1998) and 19 soil characteristics were also explored. The gross N mineralisation (m) and NH 4 + immobilisation rates (ia) were similar and significantly correlated (p<0.001) and decreased during the incubation. Both m and ia were higher in burned than in unburned soils and, despite a reduction with time, differences were still 3-fold at t=12 months. Treatment explained half the variation of gross nitrification (kn), which was always low in US and nil in burned soils. Nitrate immobilisation (in) was the only gross rate that was (a) higher in unburned than in burned soils, (b) higher after 12 months than in previous samplings and (c) negatively affected by mulching. Both m and ia were positively correlated with soil pH, initial inorganic-N pools and extractable-Mn (p<0.05 to p<0.001) and negatively correlated with soil water-holding capacity and contents of total C, total N, extractable Cu and extractable Zn (p<0.05 to p<0.001). Both kn and in were negatively correlated with soil characteristics. Despite the strong correlations of pH and total C and N with the gross N transformations, the former variables were never included in the best multiple linear models for the latter. Besides the initial NH 4 + -N or NO 3 − -N contents, all but one best multiple regressions for m and ia included one or two available nutrients, in particular Cu, K, P and Mn. Multiple regressions of kn were only found for US and they included two nutrients (Ca and K, or K, Zn and electrical conductivity). Considering all samples and incubation intervals together, two thirds of in variance was explained by a model with the initial NO 3 − -N, the available Cu and P content. Mulching of burned soil gave a shortlived stimulation of m and ia and a sustained reduction of in.

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Section: Discussioncontrasting

confidence: 74%

Section: Discussioncontrasting

confidence: 60%

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confidence: 99%

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Soil gross N transformation rates after a wildfire and straw mulch application for burned soil emergency stabilisation

Gómez-Rey

González-Prieto

2015

Biol Fertil Soils

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“…To quantify the response of each of those N cycling processes to soil moisture availability, gross N transformation rates need to be determined. Previous studies have demonstrated that net N transformation rates were generally lower than gross rates both in situ (Davidson et al 1991;Hart et al 1994;Verchot et al 2001) and under laboratory incubation (Lang et al 2010); therefore, the response of net and gross rates to changes in soil moisture content may be different.…”

Section: Introductionmentioning

confidence: 94%

Soil moisture effects on gross nitrification differ between adjacent grassland and forested soils in central Alberta, Canada

et al. 2011

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Background and aims Changes in soil moisture availability seasonally and as a result of climatic variability would influence soil nitrogen (N) cycling in different land use systems. This study aimed to understand mechanisms of soil moisture availability on gross N transformation rates. Methods A laboratory incubation experiment was conducted to evaluate the effects of soil moisture content (65 vs. 100% water holding capacity, WHC) on gross N transformation rates using the 15 N tracing technique (calculated by the numerical model FLUAZ) in adjacent grassland and forest soils in central Alberta, Canada. Results Gross N mineralization and gross NH 4

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“…Carbon dioxide (CO 2 ), methane (CH 4 ), and nitrous oxide (N 2 O) are three major greenhouse gases (GHG) that contribute to global warming (Lang et al, 2010). Forest soils have been identified as sinks for CH 4 (Tang et al, 2006;Liu et al, 2008;Luo et al, 2012), and sources of CO 2 and N 2 O (Tang et al, 2006;Liu et al, 2008;Peichl et al, 2010;Christiansen et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Soil greenhouse gas fluxes from different tree species on Taihang Mountain, North China

Liu

Zhang

et al. 2014

Biogeosciences

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Abstract. The objectives of this study were to investigate seasonal variation of greenhouse gas fluxes from soils on sites dominated by plantation (Robinia pseudoacacia, Punica granatum, and Ziziphus jujube) and natural regenerated forests (Vitex negundo var. heterophylla, Leptodermis oblonga, and Bothriochloa ischcemum), and to identify how tree species, litter exclusion, and soil properties (soil temperature, soil moisture, soil organic carbon, total N, soil bulk density, and soil pH) explained the temporal and spatial variation in soil greenhouse gas fluxes. Fluxes of greenhouse gases were measured using static chamber and gas chromatography techniques. Six static chambers were randomly installed in each tree species. Three chambers were randomly designated to measure the impacts of surface litter exclusion, and the remaining three were used as a control. Field measurements were conducted biweekly from May 2010 to April 2012. Soil CO 2 emissions from all tree species were significantly affected by soil temperature, soil moisture, and their interaction. Driven by the seasonality of temperature and precipitation, soil CO 2 emissions demonstrated a clear seasonal pattern, with fluxes significantly higher during the rainy season than during the dry season. Soil CH 4 and N 2 O fluxes were not significantly correlated with soil temperature, soil moisture, or their interaction, and no significant seasonal differences were detected. Soil organic carbon and total N were significantly positively correlated with CO 2 and N 2 O fluxes. Soil bulk density was significantly negatively correlated with CO 2 and N 2 O fluxes. Soil pH was not correlated with CO 2 and N 2 O emissions. Soil CH 4 fluxes did not display pronounced dependency on soil organic carbon, total N, soil bulk density, and soil pH. Removal of surface litter significantly decreased in CO 2 emissions and CH 4 uptakes. Soils in six tree species acted as sinks for atmospheric CH 4 . With the exception of Ziziphus jujube, soils in all tree species acted as sinks for atmospheric N 2 O. Tree species had a significant effect on CO 2 and N 2 O releases but not on CH 4 uptake. The lower net global warming potential in natural regenerated vegetation suggested that natural regenerated vegetation were more desirable plant species in reducing global warming.

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Land-use type and temperature affect gross nitrogen transformation rates in Chinese and Canadian soils

Cited by 56 publications

References 46 publications

Soil gross N transformation rates after a wildfire and straw mulch application for burned soil emergency stabilisation

Soil gross N transformation rates after a wildfire and straw mulch application for burned soil emergency stabilisation

Soil moisture effects on gross nitrification differ between adjacent grassland and forested soils in central Alberta, Canada

Soil greenhouse gas fluxes from different tree species on Taihang Mountain, North China

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