PMID- 37495129
OWN - NLM
STAT- Publisher
LR  - 20231013
IS  - 1879-1026 (Electronic)
IS  - 0048-9697 (Linking)
VI  - 901
DP  - 2023 Nov 25
TI  - Soil C dynamics after deforestation and subsequent conversion of arable cropland 
      to grassland in humid temperate areas.
PG  - 165793
LID - S0048-9697(23)04416-9 [pii]
LID - 10.1016/j.scitotenv.2023.165793 [doi]
AB  - Land use and plant-soil management influence soil organic C stocks and soil 
      properties. This study aimed to identify the main mechanisms by which these 
      factors alter soil organic matter (SOM) dynamics and stocks. Changes in the 
      organic C pools and biochemical quality in different OM compartments were 
      assessed: a) after deforestation and intensive cultivation (SOM loss) and then, 
      b) after the conversion of cropland to grassland (SOM replenishment) in a 
      chronosequence of recovery (1-45 years). Topsoil samples were subjected to 
      physical fractionation to assess the distribution of free particulate OM (POM) 
      and mineral associated OM (MAOM). SOM quality was characterized by (13)C NMR 
      spectroscopy, thermal analysis (DSC/TG), and microbial activity was monitored by 
      isothermal microcalorimetry. Deforestation and intensive cultivation led to the 
      loss of 80 % of the C stored in the upper mineral soil (up to 30-35 cm). The POM 
      was almost depleted, MAOM underwent significant losses (>40 %) and all OM 
      compounds, including the aromatic C, were affected. The large and unexpected loss 
      of MAOM can be attributed to the low specific surface soil area and also to the 
      labile (biodegradable) nature of the OM in this fraction. After 45 years, 
      conversion of cropland to grassland recovered 68 % of the C lost in the mineral 
      soil (mainly as MAOM), at an annual rate of 1.25 Mg C ha(-1). The present 
      findings showed that the persistence of long-term OM depends on how strongly 
      organic compounds are adsorbed onto mineral surfaces (i.e., the specific surface 
      area) and the biochemical nature of OM compounds. Adequate plant-soil management 
      favoured the replenishment of the MAOM under these experimental conditions, and 
      this fraction was an active pool in terms of C storage and biochemical quality. 
      This study served to test current theories about changes in soil C fractions due 
      to land use changes and soil-plant management.
CI  - Copyright (c) 2023 Elsevier B.V. All rights reserved.
FAU - Merino, Agustin
AU  - Merino A
AD  - Department of Applied Physics, University of Santiago de Compostela, 27002 Lugo, 
      Spain; Elemental Analysis RIAIDT, University of Santiago de Compostela, 27002 
      Lugo, Spain; Institute of Ecology, National Autonomous University of Mexico, 
      Mexico City 04510, Mexico; Soil Science and Chemistry Department, University of 
      Santiago de Compostela, 27002 Lugo, Spain.
FAU - Omil, Beatriz
AU  - Omil B
AD  - Department of Applied Physics, University of Santiago de Compostela, 27002 Lugo, 
      Spain; Elemental Analysis RIAIDT, University of Santiago de Compostela, 27002 
      Lugo, Spain; Institute of Ecology, National Autonomous University of Mexico, 
      Mexico City 04510, Mexico; Soil Science and Chemistry Department, University of 
      Santiago de Compostela, 27002 Lugo, Spain.
FAU - Pineiro, Veronica
AU  - Pineiro V
AD  - Department of Applied Physics, University of Santiago de Compostela, 27002 Lugo, 
      Spain; Elemental Analysis RIAIDT, University of Santiago de Compostela, 27002 
      Lugo, Spain; Institute of Ecology, National Autonomous University of Mexico, 
      Mexico City 04510, Mexico.
FAU - Barros, Nieve
AU  - Barros N
AD  - Department of Applied Physics, University of Santiago de Compostela, 27002 Lugo, 
      Spain; Elemental Analysis RIAIDT, University of Santiago de Compostela, 27002 
      Lugo, Spain; Institute of Ecology, National Autonomous University of Mexico, 
      Mexico City 04510, Mexico.
FAU - Souza-Alonso, Pablo
AU  - Souza-Alonso P
AD  - Department of Applied Physics, University of Santiago de Compostela, 27002 Lugo, 
      Spain; Elemental Analysis RIAIDT, University of Santiago de Compostela, 27002 
      Lugo, Spain; Institute of Ecology, National Autonomous University of Mexico, 
      Mexico City 04510, Mexico; Soil Science and Chemistry Department, University of 
      Santiago de Compostela, 27002 Lugo, Spain. Electronic address: 
      pablo.souza@usc.es.
FAU - Campo, Julio
AU  - Campo J
AD  - Department of Applied Physics, University of Santiago de Compostela, 27002 Lugo, 
      Spain; Elemental Analysis RIAIDT, University of Santiago de Compostela, 27002 
      Lugo, Spain; Institute of Ecology, National Autonomous University of Mexico, 
      Mexico City 04510, Mexico.
LA  - eng
PT  - Journal Article
DEP - 20230724
PL  - Netherlands
TA  - Sci Total Environ
JT  - The Science of the total environment
JID - 0330500
SB  - IM
OTO - NOTNLM
OT  - C sequestration
OT  - Plant-soil management
OT  - SOM biochemical quality
OT  - SOM physical protection
OT  - Soil restoration
OT  - Solid-state (13)C NMR
COIS- Declaration of competing interest The authors declare that they have no known 
      competing financial interests or personal relationships that could have appeared 
      to influence the work reported in this paper.
EDAT- 2023/07/27 01:09
MHDA- 2023/07/27 01:09
CRDT- 2023/07/26 19:23
PHST- 2023/02/06 00:00 [received]
PHST- 2023/06/26 00:00 [revised]
PHST- 2023/07/23 00:00 [accepted]
PHST- 2023/07/27 01:09 [pubmed]
PHST- 2023/07/27 01:09 [medline]
PHST- 2023/07/26 19:23 [entrez]
AID - S0048-9697(23)04416-9 [pii]
AID - 10.1016/j.scitotenv.2023.165793 [doi]
PST - ppublish
SO  - Sci Total Environ. 2023 Nov 25;901:165793. doi: 10.1016/j.scitotenv.2023.165793. 
      Epub 2023 Jul 24.