Impact of Land-Use Change on Soil Microbial Community Composition and Organic Carbon Content in the Dry Tropics

Kumar, Chandra Mohan; Ghoshal, Nandita

doi:10.1016/s1002-0160(17)60404-1

Cited by 16 publications

(7 citation statements)

References 22 publications

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“…Furthermore, alterations in the composition of soil microorganisms can significantly influence the rate of decomposition of organic matter. Some studies have demonstrated that an increased F:B and a decreased GP:GN have a positive effect on the decomposition of soil organic matter ( Kumar and Ghoshal, 2017 ; Fanin et al, 2019 ), which align with the findings of this study ( Table 3 ). Interestingly, our research revealed that the M2, rather than the M3, had the maximum TOC, TN, and AP ( Table 1 ).…”

Section: Discussionsupporting

confidence: 92%

Effective microorganisms input efficiently improves the vegetation and microbial community of degraded alpine grassland

Li,

Wei,

Shao

et al. 2024

Front. Microbiol.

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Soil beneficial microorganism deficiency in the degraded grasslands have emerged as the major factors negatively impacting soil quality and vegetation productivity. EM (effective microorganisms) has been regarded as a good ameliorant in improving microbial communities and restoring degraded soil of agricultural systems. However, knowledge was inadequate regarding the effects of adding EM on the degraded alpine grassland. Four levels of EM addition (0, 150, 200, 250 mL m–2) were conducted to investigate the effects of EM addition on soil properties and microorganisms of degraded alpine grassland. The addition of EM increased aboveground biomass, soil organic carbon, total nitrogen, available phosphorus, and microbial biomass, but decreased soil electric conductivity. Meanwhile, the relative biomasses of gram-negative bacteria decreased, while the ectomycorrhizal fungi and arbuscular mycorrhizal fungi increased after EM addition. The relationship between microbial communities and environmental factors has been changed. The restore effect of EM increased with the increase of addition time. These results indicated that EM addition could be a good practice to restore the health of the degraded alpine grassland ecosystem.

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Section: Discussionsupporting

confidence: 92%

Effective microorganisms input efficiently improves the vegetation and microbial community of degraded alpine grassland

Li,

Wei,

Shao

et al. 2024

Front. Microbiol.

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“…Previous studies in India evaluated the effect of land use conversions on soil microbiota and soil enzymes (Singh and Ghoshal 2014;Kumar and Ghosal 2017;Rai et al 2018;Tiwari et al 2019). However, not many such studies have compared the soil microbial parameters and enzymes in different land use/cover in semiarid regions of India.…”

Section: Introductionmentioning

confidence: 99%

Assessment of soil microbial and enzyme activity in the rhizosphere zone under different land use/cover of a semiarid region, India

Meena

Rao

2021

Ecol Process

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Background Land use/cover and management practices are widely known to influence soil organic matter (SOM) quality and quantity. The present study investigated the effect of different land use, i.e., forests viz. mixed forest cover (MFC), Prosopis juliflora (Sw.) DC-dominated forest cover (PFC), and cultivated sites viz. agriculture field (AF), vegetable field (VF), respectively, on soil parameter, microbial activity, and enzymes involved in soil nutrient cycle in a semiarid region of India. Results The results showed a significant reduction (P < 0.05) in soil carbon (SC), soil nitrogen (SN) content (~ 30–80%) and consequently the soil microbial biomass carbon (SMBC) (~ 70–80%), soil basal respiration (SBR), soil substrate-induced respiration (SSIR), and soil enzyme activities (β-glucosidase, acid phosphatase, and dehydrogenase) under cultivated sites in comparison with forest sites. Pearson’s correlation showed that a positive correlation of SC with SMBC, SBR, SSIR (P < 0.01), and enzymatic activities (i.e., β-glucosidase, dehydrogenase) (P < 0.05) may imply the critical role of SC in regulating microbial and enzymatic activity. Also, a positive correlation of soil moisture with urease activity (P < 0.01) was found suggesting it as a significant abiotic factor for soil biological functions. Additionally, based on the PCA analysis, we observed the clustering of SMBC/SC ratio and qCO2 nearby AF. Conclusion Our study suggests that soil microbial parameters (SMBC, SBR, SSIR, SMBC/SC, qCO2) and enzyme activity are key indicators of soil health and fertility. Land use/cover alters the SOM content and soil microbial functions. The management strategies focusing on the conservation of natural forest and minimizing the land disturbances will be effective in preventing soil carbon flux as CO2 and maintaining the SC stock.

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“…This intensive land exploitation has occurred at the cost of SOC depletion and increasing annual total CO 2 emissions (Piccolo et al, ). It has also been proposed that land‐use changes from grasslands or forests to croplands induced a transformation in SOC and a shift in soil microbial communities (Kumar & Ghoshal, ; Zhang et al, ). Previous studies have shown that soil disturbance during land‐use changes from grasslands to croplands generally results in a great reduction of the LOC pool (Sheng et al, ).…”

Section: Introductionmentioning

confidence: 99%

Long‐term fertilization alters microbial community but fails to reclaim soil organic carbon stocks in a land‐use changed soil of the Tibetan Plateau

Wang

Kang

et al. 2019

Land Degrad Dev

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The microbial community and soil organic carbon (SOC), which play vital roles in soil fertility and the global C cycle, have been heavily altered due to land-use changes and long-term fertilization. However, the effect of long-term fertilization on the microbial community and SOC in land-use changed soil is still unclear. In this study, a 26-year field experiment is conducted to detect the bacterial community and SOC stocks in the soils from meadow grasslands (M), croplands without fertilization (NF), and croplands with fertilization for 13 (F13a) and 26 years (F26a) in the Tibetan Plateau. The results show that land-use change from meadow grassland to cropland induced a decrease in the SOC stocks of total (TOC), free (FOC) and permanganate-oxidizable OC (POxC) by 61.8-85.0, 51.1-82.8, and 78.4-95.8%, respectively. Long-term fertilization increased the SOC stocks by 124.4-419.0%, which was still lower than those in the M soils. In addition, macroaggregates (MAA) and bacterial diversity displayed reductions when the land-use was changed from grassland to cropland, but they were enhanced after long-term fertilization. Land-use change and long-term fertilization both altered the microbial community. MAA served as a habitat for the microbial community and physical protection for SOC. This may be a key driver of changes in the bacterial community and SOC. This study demonstrates that long-term fertilization alters the microbial community but fails to restore SOC stocks to the level of uncropped meadow soils. Long-term fertilization integrated with macroaggregates are required to improve OC sequestration for developing sustainable agriculture and mitigating global climate change.

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Impact of Land-Use Change on Soil Microbial Community Composition and Organic Carbon Content in the Dry Tropics

Cited by 16 publications

References 22 publications

Effective microorganisms input efficiently improves the vegetation and microbial community of degraded alpine grassland

Effective microorganisms input efficiently improves the vegetation and microbial community of degraded alpine grassland

Assessment of soil microbial and enzyme activity in the rhizosphere zone under different land use/cover of a semiarid region, India

Long‐term fertilization alters microbial community but fails to reclaim soil organic carbon stocks in a land‐use changed soil of the Tibetan Plateau

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