In:
PLOS ONE, Public Library of Science (PLoS), Vol. 17, No. 8 ( 2022-8-10), p. e0263205-
Abstract:
Soil organic carbon (SOC) plays a key role in regulating soil quality functions and ecosystem services. The objective of our study was to evaluate the impact of deforestation and subsequent land-use change on the SOC and total nitrogen (TN) concentration, quality, and lability under otherwise similar soil and environmental conditions. Geo-referenced composite soils (0 to 30 cm depth at 7.5 cm interval) sampled from agriculture, bioenergy plantations ( Miscanthus x giganteus ), Conservation Reserve Program (CRP), and wetland were analyzed for SOC, TN, active C (AC), humic- and fulvic acid (HA and FA), non-humic C (NH), E 4 : E 6 ratio, humification indices (HI, HR, and DH), and carbon and nitrogen management indices (CPI, NPI, and CMI), compared to soils under protected forest as a control. Results showed that the CRP had the highest depth distribution and profile-wise stocks of SOC, TN, AC, and FA with respect to the lowest in agriculture upon conversion of forest. Moreover, the SOC and TN contents were significantly stratified in the CRP when compared to agriculture. While agriculture had the wider HA: FA ratios with highest HI and HR but lowest DH values, the CRP, in contrast, had the narrow HA: FA ratios with lowest HI but highest DH values, when compared to the forest. Spectral analyses have shown lower E 4 : E 6 ratios under the forest when compared to both agriculture and the CRP; however, the later had significantly higher E 4 : E 6 ratios than that of agriculture. The CPI, as measures of SOC accumulation or depletion, significantly decreased by 16% under agriculture but increased by 12% under the CRP. While the CMI, as measures of SOC accumulation or depletion and lability, with higher values under the CRP suggested a proportionally more labile SOC accumulation, in contrast, the smaller values under agriculture indicated a greater depletion of labile SOC over time. Moreover, the CRP may have favored a more labile SOC accumulation with higher proportions of aliphatic C compounds, whereas agriculture may have a SOC with high proportions of non-labile aromatic C compounds. Principal components analysis clearly separated and/or discriminated the land-use impacts on soil carbon pools and TN. Likewise, redundancy analysis of the relationship between measured soil parameters and land-use validated that the TOC, TN, FA, humin, and CPI were significantly impacted due to synergism among soil properties as positively influenced by the CRP upon conversion of agriculture.
Type of Medium:
Online Resource
ISSN:
1932-6203
DOI:
10.1371/journal.pone.0263205
DOI:
10.1371/journal.pone.0263205.g001
DOI:
10.1371/journal.pone.0263205.g002
DOI:
10.1371/journal.pone.0263205.g003
DOI:
10.1371/journal.pone.0263205.g004
DOI:
10.1371/journal.pone.0263205.g005
DOI:
10.1371/journal.pone.0263205.g006
DOI:
10.1371/journal.pone.0263205.g007
DOI:
10.1371/journal.pone.0263205.g008
DOI:
10.1371/journal.pone.0263205.t001
DOI:
10.1371/journal.pone.0263205.t002
DOI:
10.1371/journal.pone.0263205.t003
DOI:
10.1371/journal.pone.0263205.t004
DOI:
10.1371/journal.pone.0263205.t005
DOI:
10.1371/journal.pone.0263205.t006
DOI:
10.1371/journal.pone.0263205.s001
DOI:
10.1371/journal.pone.0263205.s002
DOI:
10.1371/journal.pone.0263205.r001
DOI:
10.1371/journal.pone.0263205.r002
DOI:
10.1371/journal.pone.0263205.r003
DOI:
10.1371/journal.pone.0263205.r004
Language:
English
Publisher:
Public Library of Science (PLoS)
Publication Date:
2022
detail.hit.zdb_id:
2267670-3
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