Kinetic Responses of Soil Carbon Dioxide Emission to Increasing Urea Application Rate

Lee, Sun-Il; Lim, Sang-Sun; Lee, Kwang-Seung; Kwak, Jin‐Hyeob; Jung, Jae-Woon; Ro, Hee-Myoung; Choi, Woo‐Jung

doi:10.5338/kjea.2011.30.2.99

Cited by 14 publications

(5 citation statements)

References 18 publications

(27 reference statements)

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“…(2021), in which nitrification was contributing the most to N 2 O emissions at 70% WFPS. In addition, the initial CO 2 peak coincided with those of N 2 O and NO, as a result of the amendment application, and provides evidence of aerobic respiration (Lee et al., 2011). The duration of this peak is similar to the first N 2 O and NO peaks.…”

Section: Discussionmentioning

confidence: 68%

The short‐lived inhibitory effect of Brachiaria humidicola on nitrous oxide emissions following sheep urine application in a highly nitrifying soil

Charteris

Loick

et al. 2021

J. Plant Nutr. Soil Sci.

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Background Brachiaria humidicola (Bh) has the ability to produce biological nitrification inhibitors (NIs) and release NIs from the root to the soil. Aims To compare the effects of growing Bh with Brachiaria ruziziensis (Br, which is not able to produce NIs) on soil nitrogen (N) dynamics, N gases and carbon dioxide (CO2) emissions and nitrifiers and denitrifiers following sheep urine application, a laboratory incubation was conducted in a He/O2 continuous flow denitrification system (DENIS). This incubation was conducted in the absence of light. Hence the measured effects of Bh and Br on N cycling were the residual effect of biological NIs released into the soil prior to the incubation and released via root death. Methods The treatments were: (1) Bh with water application (Bh + W); (2) Bh with sheep urine (Bh + U); (3) Br with water application (Br + W); (4) Br with sheep urine (Br + U). Results Results showed that soil NO3– concentration increased significantly in the soil with sheep urine application after the incubation. Soil nitrous oxide (N2O) and nitric oxide (NO) emissions increased immediately after the sheep urine application and peaked twice during the incubation. Cumulative emissions for the first peak were significantly lower from the Bh + U treatment (0.054 kg N ha–1) compared with the Br + U treatment (0.111 kg N ha–1), but no significant differences were observed in the total cumulative N2O and NO emissions between the Bh + U and Br + U treatment at the end of the incubation. Sheep urine addition did not affect the AOA, nirS and nosZ gene copies, but significantly increased the AOB gene copies after the incubation. Conclusions We conclude that the residual effect of Bh to mitigate N2O emissions in a highly nitrifying soil is short‐lived.

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Section: Discussionmentioning

confidence: 68%

The short‐lived inhibitory effect of Brachiaria humidicola on nitrous oxide emissions following sheep urine application in a highly nitrifying soil

Charteris

Loick

et al. 2021

J. Plant Nutr. Soil Sci.

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“…This might be due to urea popularity. Urea is one of the most widely used N fertilizers due to its high N content, solubility, and nonpolarity [46]. However, application of urea as a N fertilizer increases CO 2 emissions from the soil due to CO 2 generation from urea hydrolysis and fertilizer-induced decomposition of soil organic carbon [47].…”

Section: Discussionmentioning

confidence: 99%

Analysis of Sources and Trends in Agricultural GHG Emissions from Annex I Countries

Wójcik‐Gront

2020

Atmosphere

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The vast majority of the scientific community believe that anthropogenic greenhouse gas (GHG) emissions are the predominant cause of climate change. One of the GHG emission sources is agriculture. Following the International Panel on Climate Change (IPCC) guidelines regarding GHG emission calculation, agriculture is responsible for around 10% of the overall global emissions. Agricultural GHG emissions consist of several emission source categories and several GHGs. In this article were described the results of multivariate statistical analyses performed on data gathered during the period 1990–2017 from the inventories of 43 Annex I countries (parties to the United Nations Framework Convention on Climate Change, UNFCCC, listed in Annex I of the Convention). Trends in the agricultural GHG emissions were analyzed. Generally, the global agricultural GHG emissions are increasing, while the emissions from Annex I countries are decreasing. Apart from the application of urea, emissions from all other sources, such as enteric fermentation, manure management, rice cultivation, agricultural soils, field burning of agricultural residues, and liming are decreasing. Based on multivariate analysis, the most different countries, in terms of GHG emission sources composition in agriculture and emission trends, are Australia, Japan, New Zealand and USA. The rest of the Annex I countries are mostly from Europe and their shares and trends are similar, with slight differences between countries depending, among others, on the date of joining the European Union.

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“…Additionally, in the case of urea, the carbon is fossil in origin. Once land is applied, this carbon-which comprises approximately 20% of the fertiliser mass-is almost entirely labile and constitutes a further environmental impact [28]. Reserves of naturally-occurring N-rich rocks and minerals might offer viable fertiliser supplements to help address some of these issues.…”

Section: Geological N Prospectsmentioning

confidence: 99%

Geo-Agriculture: Reviewing Opportunities through Which the Geosphere Can Help Address Emerging Crop Production Challenges

et al. 2020

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The agricultural sector faces looming challenges including dwindling fertiliser reserves, environmental impacts of conventional soil inputs, and increasingly difficult growing conditions wrought by climate change. Naturally-occurring rocks and minerals may help address these challenges. In this case, we explore opportunities through which the geosphere could support viable agricultural systems, primarily via a literature review supplemented by data analysis and preliminary-scale experimentation. Our objective is to focus on opportunities specifically relating to emerging agricultural challenges. Our findings reveal that a spectrum of common geological materials can assist across four key agricultural challenges: 1. Providing environmentally-sustainable fertiliser deposits especially for the two key elements in food production, nitrogen (via use of slow release N-rich clays), and phosphorus (via recovery of the biomineral struvite) as well as through development of formulations to tap into mineral nutrient reserves underlying croplands. 2. Reducing contamination from farms—using clays, zeolites, and hydroxides to intercept, and potentially recycle nutrients discharged from paddocks. 3. Embedding drought resilience into agricultural landscapes by increasing soil moisture retention (using high surface area minerals including zeolite and smectite), boosting plant availability of drought protective elements (using basalts, smectites, and zeolites), and decreasing soil surface temperature (using reflective smectites, zeolites, and pumices), and 4. mitigating emissions of all three major greenhouse gases—carbon dioxide (using fast-weathering basalts), methane (using iron oxides), and nitrous oxide (using nitrogen-sorbing clays). Drawbacks of increased geological inputs into agricultural systems include an increased mining footprint, potential increased loads of suspended sediments in high-rainfall catchments, changes to geo-ecological balances, and possible harmful health effects to practitioners extracting and land-applying the geological materials. Our review highlights potential for ‘geo-agriculture’ approaches to not only help meet several key emerging challenges that threaten sustainable food and fiber production, but also to contribute to achieving some of the United Nations Sustainable Development Goals—‘Zero Hunger,’ ‘Life on Land,’ and ‘Climate Action.’

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Kinetic Responses of Soil Carbon Dioxide Emission to Increasing Urea Application Rate

Cited by 14 publications

References 18 publications

The short‐lived inhibitory effect of Brachiaria humidicola on nitrous oxide emissions following sheep urine application in a highly nitrifying soil

The short‐lived inhibitory effect of Brachiaria humidicola on nitrous oxide emissions following sheep urine application in a highly nitrifying soil

Analysis of Sources and Trends in Agricultural GHG Emissions from Annex I Countries

Geo-Agriculture: Reviewing Opportunities through Which the Geosphere Can Help Address Emerging Crop Production Challenges

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