Green manure application accelerates soil organic carbon stock loss under plastic film mulching

Hwang, Hyun Young; Cuello, Jennifer; Kim, Sang Yoon; Lee, Jeong Gu; Kim, Pil Joo

doi:10.1007/s10705-019-10042-z

Cited by 14 publications

(7 citation statements)

References 51 publications

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“…Different from previous studies, the contribution of polyethylene mulching to the net soil C balance was negligible, due to a tradeoff between SOC mineralization and root C exudation (Hwang et al, 2020;Lee et al, 2019). Our study showed that polyethylene mulching decreased SOC, indicating that the C input from crop roots and associated exudates was less than SOC mineralization (Zhang et al, 2019).…”

Section: Impacts Of Subsurface Organic Ameliorant Plus Polyethylene M...contrasting

confidence: 91%

“…Our study showed that polyethylene mulching decreased SOC, indicating that the C input from crop roots and associated exudates was less than SOC mineralization (Zhang et al, 2019). Further, the decrease of SOC with subsurface organic ameliorant was greater than without subsurface organic ameliorant (Figure 2), because sufficient carbon input promotes microbial activity, accelerates SOC mineralization, and increase soil C losses (Hwang et al, 2020). Overall, subsurface organic ameliorant plus polyethylene mulching is a viable way of increasing SOC, while potential soil C losses need to be further attention.…”

Section: Discussionmentioning

confidence: 99%

“…Presently, polyethylene mulching is frequently used in salinization soil during agricultural production to reduce plant salt stress and boost crop yield (An et al, 2015; Zhang et al, 2020). Whereas, polyethylene mulching promotes soil organic carbon (SOC) mineralization due to increased soil water contents, topsoil temperatures (Hwang et al, 2020), and soil microbial community composition (e.g., arbuscular mycorrhizal fungi) (Liu et al, 2020). Currently, studies related to the impacts of mulching on soil aggregates are predominately focused on aggregate content, distribution, and stability (Jin et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Subsurface organic ameliorant plus polyethylene mulching strengthened soil organic carbon by altering saline soil aggregate structure and regulating the fungal community

et al. 2022

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Subsurface organic ameliorant plus polyethylene mulching is a novel strategy for saline soil improvement and utilization in China. However, little is known about how this strategy impacts soil organic carbon (SOC) both directly (carbon input) and indirectly (soil aggregates protection and microbial regulation). Therefore, a field experiment was arranged and sampled after 3 years, including four treatments, i.e., no ameliorant with and without polyethylene mulching, and subsurface (10–30 cm soil depth) organic ameliorant with and without polyethylene mulching. Subsurface organic ameliorant raised the SOC content in the 0–40 cm by 70% and 90% with and without mulching, respectively. Subsurface organic ameliorant converted the major aggregation size from <0.053 to 0.25–2 mm, indicating that both direct carbon (C) input and indirect soil aggregates protection contributed to the increase in SOC content. In contrast, polyethylene mulching reduced the SOC content by 16% and 6% with and without organic ameliorant respectively. This was due to lower fungal diversity by 9%–14% and supported by the positive effect from fungal diversity to SOC. Further, the subsurface organic ameliorant plus polyethylene mulching increased SOC by 61% through direct C input, indirect soil aggregates protection and microbial regulation. Meanwhile, the contribution of physical protection standardized total effect (STE) = 0.223–0.294] was higher than microbial regulation (STE = 0.040–0.162) according to a structural equation model. Consequently, subsurface organic ameliorant plus polyethylene mulching represents a feasible agricultural practice to increase the SOC content for saline soil amelioration.

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Section: Impacts Of Subsurface Organic Ameliorant Plus Polyethylene M...contrasting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Subsurface organic ameliorant plus polyethylene mulching strengthened soil organic carbon by altering saline soil aggregate structure and regulating the fungal community

et al. 2022

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“…Although both NPK and NF did not have additional carbon input, there was significant difference between them. It might be due to the consecutively increased rhizodeposition, root biomass by increased maize biomass (Hwang et al, 2020;Kong et al, 2020). The SOC stock in COM was the highest (27.0 Mg C ha -1 ) which was increased by 10 -55% over NPK (19.1 0 Mg C ha -1 ) and NF (17.4 Mg C ha -1 ).…”

Section: Resultsmentioning

confidence: 97%

Soil Labile Organic Carbon Fractions and Carbon Management Index in Response to Different Fertilization under Organic Maize Farming System

Hwang¹,

An²,

Lee³

et al. 2022

Korean J. Soil. Sci. Fert.

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Organic farming has been known to improve soil quality by enhancing soil organic carbon (SOC) contents. The labile organic carbon (LOC) pools and carbon management index (CMI) are commonly used as very sensitive indicators of changes in SOC and assessment of soil quality. This study was conducted to investigate the effect of organic farming practices on soil quality by LOC fractions and CMI analysis in a 6-year field experiment. Four treatments were included: compost (COM), green manure (GM), inorganic fertilizer (NPK), and no fertilization (NF). This study was designed to explore changes in SOC concentrations, soil labile organic C fractions (microbial biomass C (MBC), water and hot water-extractable C (WEC, HWEC), particulate organic C (POC), light fraction organic C (LFOC) and permanganate oxidizable C (POXC)) and CMI within the bulk soil under organic corn cultivation condition. Organic fertilization significantly increased SOC concentrations and stocks by 10 -55% compared to NPK and NF, especially, compost treatment. All labile carbon fractions were higher in COM and GM compared to NPK and NP, except MBC content. Among the LOC fractions, POC showed the highest proportion (32 -87%) on total SOC. The CMI varied from 0.87 to 2.77, organic fertilized treatments increased by 1.7 -3.2 times over NPK. These results showed that POC and POXC could be used as a rapid and informative indicator to assess soil quality and SOC changes. Hence, organic farming management could therefore contribute to improved nutrient cycling services and higher soil quality.

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“…While mulching had no significant effect on the SOC content ( p > 0.05) on day 150, and decreased ( p < 0.05) the SOC content on day 360 (Figure 1). Previous studies have observed that mulching greatly enhanced SOC decomposition under green manure application (Hwang et al, 2020; Lee et al, 2021). A lower ratio of MNC to MBC indicated that MNC could be less efficiently stored in the MF treatment with mulching than that in the MF treatment without mulching within 150–360 days (Table 1).…”

Section: Discussionmentioning

confidence: 95%

Plastic film mulching maintains soil organic carbon by increasing fungal necromass carbon under manure application

Liu,

Bol,

et al. 2023

European J Soil Science

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Microbial necromass carbon (MNC) is a major contributor to soil organic carbon (SOC) sequestration. Fertilization combined with plastic film mulching, as an intensive agricultural practice to increase crop yields, affects soil microbial growth and metabolism. Nevertheless, how fertilization combined with mulching affects SOC sequestration by mediating MNC dynamics remains elusive. Here, the mulching and no‐mulching sub‐treatments were set under three fertilization treatments (no fertilization, NF; inorganic fertilization, IF; manure, MF), and a 900‐day field incubation experiment using polyvinyl chloride containers was conducted in the buffer zone of NF treatment. We investigated the effects of fertilization combined with mulching on MNC composition (including fungal necromass carbon, FNC; and bacterial necromass carbon, BNC) and qualified their contributions to SOC sequestration. The MF treatment with/without mulching significantly increased the contents of MNC, FNC, BNC, and SOC by 97%–122%, 81%–94%, 152%–210%, and 60%–70% compared with the NF treatment without mulching over 900 days, respectively. The MNC content had a strongly positive correlation with particulate organic carbon and microbial biomass C (p < 0.01). During the incubation stage, the proportion of MNC in SOC was higher in the IF (37%–42%) and MF (40%–44%) treatments with/without mulching than that in the NF treatment with/without mulching (31%–35%). On day 900, mulching significantly decreased the MNC content by 8.7% and 7.8%, and decreased the proportion of MNC in SOC by 5.1% and 5.8% under the NF and IF treatments, respectively. In contrast, mulching did not significantly affect the MNC and SOC contents, but significantly increased the FNC content by 4.8% under the MF treatment on day 900. Mulching significantly decreased the proportion of BNC in SOC regardless of fertilization, and increased the proportion of FNC in SOC under the MF treatment on day 900. Overall, our findings suggest that mulching under manure application maintains SOC sequestration by promoting FNC retention.

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Green manure application accelerates soil organic carbon stock loss under plastic film mulching

Cited by 14 publications

References 51 publications

Subsurface organic ameliorant plus polyethylene mulching strengthened soil organic carbon by altering saline soil aggregate structure and regulating the fungal community

Subsurface organic ameliorant plus polyethylene mulching strengthened soil organic carbon by altering saline soil aggregate structure and regulating the fungal community

Soil Labile Organic Carbon Fractions and Carbon Management Index in Response to Different Fertilization under Organic Maize Farming System

Plastic film mulching maintains soil organic carbon by increasing fungal necromass carbon under manure application

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