effects of long-term mowing on the fractions and chemical composition of soil organic matter in a semiarid grassland
Clicks: 142
ID: 222224
2017
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This
article has not been analysed, so there is no overall score —
reader engagement is measured and shown alongside.
Reader Engagement
Emerging Content
30.0
/100
142 views
12 readers
AI Quality Assessment
Not analyzed
Readership in this journal
EmergingRanked #234 of 345 articles by views in tetrahedron letters
Most read
Least read
Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 345 in total.
Mint this article as an NFT
Not yet mintedCreate a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.
5
SUSD
one-off · no wallet required
Abstract
The grassland ecosystem is a significantly important terrestrial carbon pool.
Intensive mowing is common to meet the need of increased livestock. However,
little information on the quality and quantity of soil organic matter (SOM)
under different mowing managements has been documented. In this work, in
order to evaluate the impacts of different mowing managements on the quality
and quantity of SOM, the fractions and chemical composition of SOM under
different mowing managements were determined using traditional fractionation
methods and spectroscopy technologies, including advanced nuclear magnetic
resonance (NMR) (e.g. cross-polarization magic angle spinning 13C-NMR,
CPMAS 13C-NMR) and Fourier-transform infrared (FTIR) based on a 13-year
field mowing trial with four treatments: unmown (M0), mowing once every
second year (M1/2), mowing once a year (M1) and mowing twice a year (M2). The
results showed that compared with M0, M1/2 and M1 significantly enhanced the
SOM accumulation and increased the stability of SOM by enhancing
humification, while M2 limited SOM accumulation and microbial biomass.
Substituted alkyl carbon (C) was the major organic C type in the grassland
ecosystem, and it made up over 40 % of the total C. M1/2 and M1
significantly increased stable C functional groups (alkyl C and aromatic C)
by degrading labile C functional groups (O-alkyl and carbonyl C) and
forming recalcitrant humus, while M2 had opposite effects. The consistent
increase in the values of NMR indices reflecting the degradation degree,
hydrophobicity and aromaticity of SOM in M1 reflected the fact that M1 had
the largest contribution to increasing the stability of SOM, while these
values in M2 were similar to those in M0. Significant correlations between
different SOM fractions and nitrogen (N) mineralization, and between the
contents of different C functional groups and net soil organic nitrogen
mineralization or microbial biomass C, indicated that the shifts in SOM
fractions and chemical composition were closely related to soil microbial
biomass and activity. Therefore, in view of the quality and quantity of SOM
and the sustainable development of grassland ecosystems, M1 was the optimal
mowing management, while M2 should be avoided in the semiarid grassland.
| Reference Key |
li2017biogeoscienceseffects
Use this key to autocite in the manuscript while using
SciMatic Manuscript Manager or Thesis Manager
|
|---|---|
| Authors | ;J. Li;Q. Zhang;Y. Li;Y. Liu;J. Xu;H. Di |
| Journal | tetrahedron letters |
| Year | 2017 |
| DOI |
10.5194/bg-14-2685-2017
|
| URL | |
| Keywords |
Citations
No citations found. To add a citation, contact the admin at info@scimatic.org
Comments
No comments yet. Be the first to comment on this article.