English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We examined bulk soil properties and molecular biomarker distributions insurface soils from Inner Mongolian grasslands in order to understand theresponses of soil organic matter to different land use. A total of 16 soilswere collected from severely degraded grassland by overgrazing (DG), nativegrassland without apparent anthropogenic disturbance (NG),groundwater-sustaining grassland (GG) and restored grassland from previouspotato cropland (RG). Compared to NG, soil organic carbon content was lowerby 50% in DG, but higher by six-fold in GG and one-fold in RG. Theδ<sup>13</sup>C values of soil organic carbon were–24.2 ± 0.6‰ in DG, –24.9 ± 0.6‰ in NG,–25.1 ± 0.1‰ in RG and –26.2 ± 0.6‰ in GG,reflecting different degradation degrees of soil organic matter or differentwater use efficiencies. The soils in DG contained the lowest abundance ofaliphatic lipids (n-alkanes, n-alkanols, n-alkanoic acids, ω-hydroxylalkanoic acids and α-hydroxyalkanoic acids) and lignin-phenols, suggesting selectiveremoval of these biochemically recalcitrant biomarkers with grasslanddegradation by microbial respiration or wind erosion. Compared to NG, thesoils in GG and RG increased ω-hydroxylalkanoic acids by60–70%, a biomarker for suberin from roots, and increased α-hydroxylalkanoic acids by 10–20%, a biomarker for both cutin andsuberin. Our results demonstrate that the groundwater supply andcultivation–restoration practices in Inner Mongolian grasslands not onlyenhance soil organic carbon sequestration, but also change the proportions ofshoot- versus root-derived carbon in soils. This finding has importantimplications for the global carbon cycle since root-derived aliphatic carbonhas a longer residence time than the aboveground tissue-derived carbon insoils

Soil organic matter dynamics under different land use in grasslands in Inner Mongolia (northern China)