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@ARTICLE{AlRabaiai:917288,
author = {Al-Rabaiai, Ahmed and Menezes-Blackburn, Daniel and
Al-Ismaily, Said and Janke, Rhonda and Pracejus, Bernhard
and Al-Alawi, Ahmed and Al-Kindi, Mohamed and Bol, Roland},
title = {{C}ustomized biochar for soil applications in arid land:
{E}ffect of feedstock type and pyrolysis temperature on soil
microbial enumeration and respiration},
journal = {Journal of analytical and applied pyrolysis},
volume = {168},
issn = {0165-2370},
address = {New York, NY [u.a.]},
publisher = {Science Direct},
reportid = {FZJ-2023-00518},
pages = {105693 -},
year = {2022},
abstract = {Biochar is rapidly gaining worldwide interest as an
agro-technology for increasing soil health and carbon
storage. This study investigated the physicochemical
characteristics and impact on soil microbes of biochar
amendments from three feedstock sources: date palm leaves
(D), mesquite plants (M) and sludge compost (S.C.);
pyrolyzed at 450 ℃, 600 ℃ and 750 ℃. Scanning
electron microscopy images showed an apparent pore size
increase with increasing pyrolysis temperature. The increase
in pyrolysis temperature decreased O-H and C-O bonds and
increased the proportion of C-C bonds, as obtained from the
Fourier transform infrared spectroscopy studies.
Thermostability was highest at a pyrolysis temperature of
750 ℃, with distinct thermal decomposition profiles for
each of the three feedstock materials used, as indicated by
the dynamic thermal gravimetric analysis. The SC biochars
showed the highest mineral content $(45–66\%)$ with
significantly higher water-soluble and total concentrations
of mineral elements. The SC samples also showed the presence
of possible soil contaminants such as Pb and As, and its use
as a soil amendment is not recommended, even though the SC
at 450 ℃ was the only nonalkaline biochar in this study.
The M feedstock produced biochar with the highest surface
area (600 m2 g−1) and carbon content based on loss on
ignition $(94.98\%);$ nevertheless, the M biochar reduced
soil microbial enumeration and respiration. This reduction
increased with increasing pyrolysis temperature. Therefore,
the M biochar feedstocks are not recommended for improving
soil health and may be tested in the future as a microbial
inhibitor for soil-borne plant pathogens. Considering the
physicochemical properties and the biochar impact on soil, D
at 600 ℃ was the best biochar selected for further
studies as a soil amendment. The large differences in
biochar physicochemical properties and their effect on soil
microbes observed in this study suggest that the feedstock
type and pyrolysis temperatures must be considered during
biochar amendment production for improving soil health in
arid-land agroecosystems.},
cin = {IBG-3},
ddc = {660},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {2173 - Agro-biogeosystems: controls, feedbacks and impact
(POF4-217)},
pid = {G:(DE-HGF)POF4-2173},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000861803700003},
doi = {10.1016/j.jaap.2022.105693},
url = {https://juser.fz-juelich.de/record/917288},
}