Soil carbon and nitrogen dynamics by land use and management changes in East and Southeast Asian countries (soil C and N by LUMC)

Cheng, Weiguo

doi:10.1080/00380768.2020.1718923

Cited by 8 publications

(1 citation statement)

References 21 publications

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“…The amendment with a controlled-release fertilizer in soil could help reduce N 2 O emissions by 26-50% than urea application without sacrificing grain yield (Ji et al, 2012). There are many studies on soil improvement using C and N (Ali et al, 2021;Cheng, 2020;Liu et al, 2021;Pal & Marschner, 2016); however, they lack a unified mathematical index or standard to evaluate the effect of the research done. The differences of objective conditions in each study make it difficult to draw horizontal comparison of results, which leads to the inability to judge the real effect of soil improvement.…”

Section: Introductionmentioning

confidence: 99%

Effects of fertilizer and biochar applications on the relationship among soil moisture, temperature, and N₂O emissions in farmland

Wang

Yang

et al. 2021

PeerJ

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Background Di-nitrogen oxide (N2O) emissions from soil may lead to nonpoint-source pollution in farmland. Improving the C and N content in the soil is an excellent strategy to reduce N2O emission and mitigate soil N loss. However, this method lacks a unified mathematical index or standard to evaluate its effect. Methods To quantify the impact of soil improvement (C and N) on N2O emissions, we conducted a 2-year field experiment using biochar as carbon source and fertilizer as nitrogen source, setting three treatments (fertilization (300 kg N ha−1), fertilization + biochar (30 t ha−1), control). Results Results indicate that after biochar application, the average soil water content above 20 cm increased by ∼26% and 26.92% in 2019, and ∼10% and 12.49% in 2020. The average soil temperature above 20 cm also increased by ∼2% and 3.41% in 2019. Fertigation significantly promotes the soil N2O emissions, and biochar application indeed inhibited the cumulation by approximately 52.4% in 2019 and 33.9% in 2020, respectively. N2O emissions strongly depend on the deep soil moisture and temperature (20–80 cm), in addition to the surface soil moisture and temperature (0–20 cm). Therefore, we established an exponential model between the soil moisture and N2O emissions based on theoretical analysis. We find that the N2O emissions exponentially increase with increasing soil moisture regardless of fertilization or biochar application. Furthermore, the coefficient a < 0 means that N2O emissions initially increase and then decrease. The aRU < aCK indicates that fertilization does promote the rate of N2O emissions, and the aBRU > aRU indicates that biochar application mitigates this rate induced by fertilization. This conclusion can be verified by the sensitivity coefficient (SCB of 1.02 and 14.74; SCU of 19.18 and 20.83). Thus, we believe the model can quantify the impact of soil C and N changes on N2O emissions. We can conclude that biochar does significantly reduce N2O emissions from farmland.

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Section: Introductionmentioning

confidence: 99%

Effects of fertilizer and biochar applications on the relationship among soil moisture, temperature, and N₂O emissions in farmland

Wang

Yang

et al. 2021

PeerJ

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Conservation Agriculture Improves Soil Health: Major Research Findings from Bangladesh

Hossain

Mottaleb

Maitra

et al. 2021

Conservation Agriculture: A Sustainable Approach for Soil Health and Food Security

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Long-term conversion of upland to paddy increased SOC content and N availability in a sand dune of Japan

Dewi,

Tang,

Maimunah

et al. 2024

CATENA

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Soil carbon and nitrogen dynamics by land use and management changes in East and Southeast Asian countries (soil C and N by LUMC)

Cited by 8 publications

References 21 publications

Effects of fertilizer and biochar applications on the relationship among soil moisture, temperature, and N₂O emissions in farmland

Effects of fertilizer and biochar applications on the relationship among soil moisture, temperature, and N₂O emissions in farmland

Conservation Agriculture Improves Soil Health: Major Research Findings from Bangladesh

Long-term conversion of upland to paddy increased SOC content and N availability in a sand dune of Japan

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Soil carbon and nitrogen dynamics by land use and management changes in East and Southeast Asian countries (soil C and N by LUMC)

Cited by 8 publications

References 21 publications

Effects of fertilizer and biochar applications on the relationship among soil moisture, temperature, and N2O emissions in farmland

Effects of fertilizer and biochar applications on the relationship among soil moisture, temperature, and N2O emissions in farmland

Conservation Agriculture Improves Soil Health: Major Research Findings from Bangladesh

Long-term conversion of upland to paddy increased SOC content and N availability in a sand dune of Japan

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Product

Resources

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Effects of fertilizer and biochar applications on the relationship among soil moisture, temperature, and N₂O emissions in farmland

Effects of fertilizer and biochar applications on the relationship among soil moisture, temperature, and N₂O emissions in farmland