Changes in soil organic carbon stocks under 10-year conservation tillage on a Black soil in Northeast China

Liang, Aizhen; Yang, Xueming; Zhang, X. P.; Chen, X. W.; McLaughlin, Neil; Wei, Sun; Zhang, Y.; Jia, Shengyong; Zhang, S. X.

doi:10.1017/s002185961500132x

Cited by 29 publications

(9 citation statements)

References 45 publications

(91 reference statements)

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“…This suggests that turning the soil with inversion tillage and placing residue at a deeper depth compared to mixing in residues throughout the tilled soil layer does not lead to more SOC deeper in the profile with full tillage compared to no-till management. This is similar to other studies that have also failed to detect differences between these tillage types 27–29,49–51 . Furthermore, there have been studies that found significantly higher SOC stocks with no-till adoption compared to systems with tillage management, but no differences between inversion tillage and reduced tillage management that also mix residue into the topsoil without inversion 28 .…”

Section: Discussionsupporting

confidence: 92%

Climate and Soil Characteristics Determine Where No-Till Management Can Store Carbon in Soils and Mitigate Greenhouse Gas Emissions

Ogle

Alsaker

Baldock

et al. 2019

Sci Rep

194

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Adoption of no-till management on croplands has become a controversial approach for storing carbon in soil due to conflicting findings. Yet, no-till is still promoted as a management practice to stabilize the global climate system from additional change due to anthropogenic greenhouse gas emissions, including the 4 per mille initiative promoted through the UN Framework Convention on Climate Change. We evaluated the body of literature surrounding this practice, and found that SOC storage can be higher under no-till management in some soil types and climatic conditions even with redistribution of SOC, and contribute to reducing net greenhouse gas emissions. However, uncertainties tend to be large, which may make this approach less attractive as a contributor to stabilize the climate system compared to other options. Consequently, no-till may be better viewed as a method for reducing soil erosion, adapting to climate change, and ensuring food security, while any increase in SOC storage is a co-benefit for society in terms of reducing greenhouse gas emissions.

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Section: Discussionsupporting

confidence: 92%

Climate and Soil Characteristics Determine Where No-Till Management Can Store Carbon in Soils and Mitigate Greenhouse Gas Emissions

Ogle

Alsaker

Baldock

et al. 2019

Sci Rep

194

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“…Statistical analyses were carried out using SPSS (version 11.5, SPSS Inc., Chicago, IL, USA), and the treatment means were compared using the least significant difference (LSD) test at a significance level of P<0.05 (Liang et al, 2016).…”

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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“…Prior to start of the field experiment, the site had been cultivated continuously by conventional agricultural management with monoculture maize and intensive deep tillage for more than 15 years. Other details about soil characteristics at this site are provided in Table 1 (Liang et al, 2016).…”

Section: Methodsmentioning

confidence: 99%

Tillage and cropping effects on soil organic carbon: Biodegradation and storage in density and size fractions

Zhang

Gregorich

et al. 2020

European J Soil Science

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Improvements in management practices can prevent the decline of soil organic carbon (SOC) storage caused by conventional tillage practice in Northeast China. Density and size fractionation can track the transformation of plant residue into SOC and its location in the soil matrix. We used a long-term field study in China to evaluate these changes as a result of improved management involving tillage and cropping systems. Experimental treatments included notill (NT) and mouldboard ploughing (MP) under monoculture maize (Zea mays L.) (MM) and maize-soybean (Glycine max Merr.) rotation (MS); these were compared to the traditional management involving conventional tillage (CT) under MM. An incubation study was conducted to evaluate mineralization and the biodegradability of SOC. The soils were also physically fractionated by density (light fraction, LF) and size (sand, silt and clay). With improved management, the SOC storage in the clay size fraction showed the largest increase across all fractions. This increase was greater for MS than MM. The NTMS treatment resulted in a decline in silt-OC storage compared to CTMM. The SOC mineralization (mg CO 2-C g −1 soil) was affected by tillage and driven by LF-OC and was observed in the order: NTMM (2.06) > MPMM (1.72) ≈ NTMS (1.71) > CTMM (1.52) ≈ MPMS (1.41). Both cropping and depth affected the biodegradability of SOC. Considering the plough layer (0-20 cm), treatments under MM had a larger proportion of biodegradable SOC than those under MS. We conclude that the significant differences in SOC storage in physical fractions and SOC biodegradation were caused by differences in soil management. Highlights • Clay size fraction showed the largest increase in SOC storage when residue was returned. • Silt size fraction lost SOC in no-till maize-soybean compared with traditional farming practice. • Potential SOC mineralization depended on quantity of SOC in the LF. • Biodegradability of the SOC was driven by cropping system not tillage.

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Changes in soil organic carbon stocks under 10-year conservation tillage on a Black soil in Northeast China

Cited by 29 publications

References 45 publications

Climate and Soil Characteristics Determine Where No-Till Management Can Store Carbon in Soils and Mitigate Greenhouse Gas Emissions

Climate and Soil Characteristics Determine Where No-Till Management Can Store Carbon in Soils and Mitigate Greenhouse Gas Emissions

Impact of Agricultural Waste Return on Soil Greenhouse Gas Emissions

Tillage and cropping effects on soil organic carbon: Biodegradation and storage in density and size fractions

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