Nitrous oxide emissions and maize yield as influenced by nitrogen fertilization and tillage operations in upland soil

Kim, Sung Un; Lee, Hyun Ho; Moon, Sung Min; Han, Hae Ri; Hong, Chang Oh

doi:10.1186/s13765-021-00593-7

Cited by 9 publications

(7 citation statements)

References 34 publications

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“…The lower average emissions suggest that basalt amendments decrease N 2 O emissions by increasing soil pH, and the lack of statistical significance could be due to another more dominant lever-in this case, soil moisture, as suggested by the machine learning framework. This implication that soil structure plays an important role in N 2 O fluxes agrees with observations suggesting that tilling practices strongly influence N 2 O fluxes (Mei et al, 2018;Kim et al, 2021;Jiang et al, 2022).…”

Section: Runsupporting

confidence: 90%

Mitigation of soil nitrous oxide emissions during maize production with basalt amendments

Chiaravalloti,

Theunissen,

Zhang

et al. 2023

Front. Clim.

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Nitrous oxide (N2O) is a potent and long-lived greenhouse gas that accounts for roughly 6% of global anthropogenic greenhouse gas emissions, and it has risen from its preindustrial concentration of 270 ppb N2O to 332 ppb N2O as a result of human activities. The majority of anthropogenic N2O emissions (52–80%) come from agricultural settings due to high rates of reactive nitrogen fertilizer application. Amending soils with fine-grained basalt is gaining traction as a carbon dioxide removal (CDR) pathway, and model simulations suggest that this process may also significantly decrease soil N2O emissions. Here, we continuously measure N2O fluxes from large-scale maize mesocosms in a greenhouse setting and use a machine learning framework to assess the relative importance of the levers on N2O fluxes. We observe significant decreases in cumulative N2O emissions (between 29–32%) from mesocosm systems with basalt addition. We find that basalt application rate, soil pH, and surface soil moisture are the strongest levers on N2O emissions depending on the system settings. These results provide empirical support for a potentially significant co-benefit of deploying enhanced rock weathering of silicates (ERW) on managed lands, particularly those subject to elevated rates of reactive nitrogen input.

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Section: Runsupporting

confidence: 90%

Mitigation of soil nitrous oxide emissions during maize production with basalt amendments

Chiaravalloti,

Theunissen,

Zhang

et al. 2023

Front. Clim.

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“…GC/MS conditions were maintained during the analysis, including a column temperature of 60 • C, heating temperature of 330 • C, and N 2 gas as a carrier [10,11]. For the calculation of gas flux, only 20 and 40 min gas sample concentrations were used because of asymptotic problems [10,29]. In addition, the linear interpolation between days was considered for the calculation of cumulative GHG emissions.…”

Section: Monitoring Greenhouse Gas Emissionsmentioning

confidence: 99%

“…Rainfall data during the experimental period indicated that heavy rainfall frequently occurred at the end of July and the beginning of September (Figure 2). Therefore, we could assume that increased WFPS in upland soil may have enhanced GHG emissions [11,29]. In addition, drying and rewetting cycle can cause the high peak of N 2 O and CO 2 in Figure 1.…”

Section: The Effect Of Amendments On Greenhouse Gas Emission Reductio...mentioning

confidence: 99%

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The Synergetic Effect of Soil Amendments on Reducing Bioavailable Heavy Metals and Greenhouse Gas Emissions from Upland Soil

Hong

Kim

et al. 2022

Agriculture

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Heavy metal pollution and greenhouse gas (GHG) emissions from soil are two major detrimental sources in the agriculture environment because of concerns about crop safety and global warming. Applying amendments on site is a common technique used for heavy metal remediation and the reduction in GHG emissions. This study aims to evaluate the effect of different amendments on the reduction in both bioavailable heavy metals and GHG emissions from soil. Four different amendments, namely bottom ash (BA), sintered material (SM), sintered material combined with lime (SM + L), and FeO (SM + FeO) were applied to upland fields, followed by maize (Zea mays L.) cultivation from April to October. Subsequently, SM + FeO treatment demonstrated the highest bioavailability reduction efficiency for As at 79.1%, and SM + L treatment had a high efficiency for the reduction in Cd and Pb by 64.6% and 41.4%, respectively. SM + FeO treatment also reduced bioaccumulated As and Pb in maize grain by 59.3% and 66.2%, respectively. Furthermore, SM + FeO treatment demonstrated the highest reduction efficiency for cumulative N2O emissions by 70.7%, compared to the control soil. Among the four different amendments, the efficiency of heavy metal and GHG emission reduction was in the following order: SM + FeO > SM + L > SM > BA. Overall, SM combined with FeO is a promising amendment for reducing and managing both heavy metal pollution and GHG emissions in soil.

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“…The impact of CO 2 is more complicated [33]. Kim [34] observed that the application of urea fertilizer in crop production increased cumulative N 2 O emissions, while conventional tillage also increased N 2 O relative to no-tillage.…”

Section: Introductionmentioning

confidence: 99%

Impact of Climate Change on Cassava Yield in Nigeria: An Autoregressive Distributed Lag Bound Approach

et al. 2022

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Across the globe, climate change is threatening the environment, crop yield and food security. The key to ensuring a sustainable environment, crop yield increase and food security is to identify the long-term significant impact of climate change and the means of reducing the effect. This study examined the impacts of climate change on cassava yield in Nigeria. Data were sourced from the Climate Change Knowledge Portal and the Food and Agricultural Organization of the United Nations spanning from 1990 to 2019. The impact of climate change was analyzed using Autoregressive Distributed Lag Bound approach, Error Correction Model and Augmented Dickey–Fuller and Phillips–Perron tests for stationarity test. The model was subjected to diagnostic tests such as stability tests, normality tests, serial correlation tests and heteroscedasticity tests. With the exception of temperature, the study revealed that arable land, rainfall and greenhouse gases such as C2O, nitrous oxide and methane had a long-term significant impact on cassava yield in Nigeria. The study also noted that methane causes long-term significant damage to cassava yield more than any other greenhouse gas and climatic variables in the study. We recommended policies and programs that facilitate the uptake of climate-smart agriculture that centers on greenhouse gas emission reduction and on crop improvement research by breeding crop varieties that will be resilient to climate shocks.

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Nitrous oxide emissions and maize yield as influenced by nitrogen fertilization and tillage operations in upland soil

Cited by 9 publications

References 34 publications

Mitigation of soil nitrous oxide emissions during maize production with basalt amendments

Mitigation of soil nitrous oxide emissions during maize production with basalt amendments

The Synergetic Effect of Soil Amendments on Reducing Bioavailable Heavy Metals and Greenhouse Gas Emissions from Upland Soil

Impact of Climate Change on Cassava Yield in Nigeria: An Autoregressive Distributed Lag Bound Approach

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