Growing Season Nitrous Oxide Emissions from a Gray Luvisol as a Function of Long-term Fertilization History and Crop Rotation

Giweta, Mekonnen; Dyck, Miles; Malhi, S. S.

doi:10.1139/cjss-2016-0106

Cited by 9 publications

(12 citation statements)

References 24 publications

(32 reference statements)

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“…Pagination not final (cite DOI) / Pagination provisoire (citer le DOI) Fig. 5 is consistent with previous observations that soil N balance, interacting with annually variable growing conditions (air and soil temperature, precipitation, and soil moisture), significantly influenced growing season emissions (Giweta et al 2017). When available soil N exceeds crop N uptake, there is potential for significant emissions under favorable soil moisture and temperature conditions (van Groenigen et al 2010).…”

Section: Ellerslie Bretonsupporting

confidence: 88%

Short-term effects of tillage of long-term no-till on nitrous oxide emissions from two contrasting Canadian prairie soils

et al. 2020

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The reduction in net CO2 emissions from increased C sequestration in soil and slower decomposition of SOM under most long-term no-till (NT) situations can potentially be offset by a concomitant increase in nitrous oxide (N2O) emissions after tillage reversal on long-term NT soils. The objective of this work was to quantify N2O emissions after tillage reversal on two contrasting western Canadian Prairie soils managed under long-term (~ 30 years) NT. We measured one growing season (2010) of soil N2O emissions on a Black Chernozem and Gray Luvisol at Ellerslie and Breton, AB, respectively following 30-years of NT and N fertilizer application at two rates (0 and 100 kg N ha-1) subjected to tillage reversal and no disturbance (i.e., continuing NT). Tillage reversal after long-term NT was associated with higher N2O emissions in both soils, but was significant only in the Gray Luvisol with 0 kg N ha-1. Long-term N fertilizer applications of 100 kg N ha-1 were associated with higher growing season soil N2O emissions and higher levels of soil N (i.e., a positive, long-term soil N balance) at both sites. Regardless of tillage, the difference in growing season nitrous oxide emissions from the 0 and 100 kg N ha-1 plots on the Gray Luvisol were much greater than the Black Chernozem. A modest increase in N2O emissions upon tillage reversal on a long-term NT soils could translate to a significant increase to agricultural greenhouse gas inventories in the event of large-scale tillage reversal on agricultural land in western Canada.

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Section: Ellerslie Bretonsupporting

confidence: 88%

Short-term effects of tillage of long-term no-till on nitrous oxide emissions from two contrasting Canadian prairie soils

et al. 2020

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“…Guyader and Maris also concluded that the application of organic fertilizers to treat N2O emissions was significantly lower than that of inorganic fertilizers (Guyader et al, 2017;Maris et al, 2016). Giweta also conducted experiments on the long-term fertilization of cultivated red soil and pointed out that the combined application of chemical fertilizers and organic fertilizers could reduce N2O emissions (Giweta et al, 2017). The substitution of organic fertilizers for chemical fertilizers (at equal N concentrations) can effectively reduce N2O emissions from dryland fields (Nótás, 2014).…”

Section: Discussionmentioning

confidence: 99%

Impact of Agricultural Waste Return on Soil Greenhouse Gas Emissions

Dong¹,

Guojun²,

Geng³

et al. 2019

Appl. Ecol. Env. Res.

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The effects of agricultural waste return on the emissions of greenhouse gases (CO2, N2O and CH4) from corn farmland in the black soil region of Northeast China and its potential to increase temperature were studied to provide a theoretical basis for formulating reduction measures of agricultural greenhouse gas emissions. This study was conducted at the Experimental Station of China Agricultural University in Quanyangou, Lishu County, Siping City, Jilin Province. Static greenhouse gas chromatography was used to monitor soil greenhouse gas fluxes under different fertilization measures, and the different fertilization treatments were analyzed for comprehensive differences in greenhouse effects among corn fields. The results showed that the average CO2 fluxes and total emissions in response to the straw return treatment were the highest, reaching 388.96 mg•m -2 •h -1 and 14718.97 kg•hm -2 , respectively, and nitrogen topdressing fertilizer significantly increased CO2 emissions. With respect to CH4 emissions, single fertilizer-treated plots had the highest average absorbed flux and total absorption-0.042 mg•m -2 •h -1 and 1.36 kg•hm -2 , respectively, and with respect to N2O fluxes, the highest flux and amount were 0.153 mg•m -2 •h -1 and 5.75 kg•hm -2 , respectively. The global warming potential of the straw in situ treatment was significantly higher than that of the other treatments, and the global warming potential of the cattle manure treatment was lower than that of the single chemical fertilizer treatment, but the differences were not significant. Moreover, straw mulch increased CO2 emissions from black soils, and dry soils were shown to be important sinks of atmospheric CH4. Combinations of organic and inorganic fertilizers and individual fertilizers can reduce N2O emissions from soils. Therefore, to achieve higher corn yields and to reduce greenhouse gas emission intensities simultaneously, applications of organic and inorganic fertilizers constitute an ideal soil fertility method in the black soil region of Northeast China.

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“…Results for plant C harvest and soil C content from the model were compared with those reported from the Breton Plots for each rotation × amendment during the past 20 (harvests) and 90 (SOC) yr. Results for total CO 2 and N 2 O emissions modelled during the growing seasons of 2013-2015 were compared with those aggregated from weekly measurements with static chambers by Giweta et al (2017).…”

Section: Model Runs Under Historical Climate From 1929 To 2018mentioning

confidence: 99%

“…These gains exceeded those in harvest removals and in leaching, causing greater gains in SOC to be modelled in 5Y, particularly with NP and M (Table 5b). Increases in R h modelled from greater litterfall, and in below-ground R a modelled from greater NPP, drove large increases in soil CO 2 -C emissions modelled in 5Y vs. WF as measured by Giweta et al (2017) (Table 6a).…”

Section: Five-year Rotationmentioning

confidence: 99%

“…Increases in NPP with augmented N inputs raise litter inputs and hence SOC (Snyder et al 2009), although declines in SOC have also been found (Khan et al 2007). Increased N inputs from fertilizer, manure or symbiotic N 2 fixation may also raise N 2 O emissions (Giweta et al 2017;Zhou et al 2017), which offset gains in SOC when calculating net greenhouse gas (GHG) exchange in agroecosystems.…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen and phosphorus control carbon sequestration in agricultural ecosystems: modelling carbon, nitrogen, and phosphorus balances at the Breton Plots with ecosys under historical and future climates

2020

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Perennial legumes in crop rotations increase soil C sequestration from greater productivity with N2 fixation. Here, we corroborated increases in soil organic carbon (SOC) and harvests modelled in 5 yr wheat–oats–barley–alfalfa/brome–alfalfa/brome (5Y) vs. 2 yr wheat–fallow (WF) rotations with those measured from 1929 to 2018. Harvest and SOC gains of 100–150 g C m−2 yr−1 and 15–25 g C m−2 yr−1 were modelled and measured in 5Y vs. WF rotations with different fertilizer and manure amendments. Modelled gains were closely related to annualized rates of N2 fixation by alfalfa of 8–10 g N m−2 yr−1. However, N2 fixation also drove increases in modelled N2O emissions of ca. 0.06 g N m−2 yr−1, which partially offset gains in SOC. Gains in harvest, SOC, and N2O emissions of 60–90 g C m−2 yr−1, 15 g C m−2 yr−1, and 0.05 g N m−2 yr−1 were modelled and measured in both rotations with amendments of N + P relative to unamended treatments. Harvest and SOC gains were smaller, and leaching and N2O losses larger, with amendments of N without P. After 100 yr of RCP 8.5 climate change, harvests in WF changed little from those in baseline runs, whereas those in 5Y rose with N + P because of increased N2 fixation. SOC declined in WF with all amendments and could only be raised in 5Y with N + P amendments. These model findings indicated the importance of N2 fixation and P amendments in determining responses of agroecosystem productivity and C sequestration to climate change.

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Growing Season Nitrous Oxide Emissions from a Gray Luvisol as a Function of Long-term Fertilization History and Crop Rotation

Cited by 9 publications

References 24 publications

Short-term effects of tillage of long-term no-till on nitrous oxide emissions from two contrasting Canadian prairie soils

Short-term effects of tillage of long-term no-till on nitrous oxide emissions from two contrasting Canadian prairie soils

Impact of Agricultural Waste Return on Soil Greenhouse Gas Emissions

Nitrogen and phosphorus control carbon sequestration in agricultural ecosystems: modelling carbon, nitrogen, and phosphorus balances at the Breton Plots with ecosys under historical and future climates

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