Communications in Soil Science and Plant Analysis,
Год журнала:
2024,
Номер
unknown, С. 1 - 23
Опубликована: Ноя. 27, 2024
Reflectance
spectroscopy
has
been
widely
utilized
by
researchers
to
characterize
and
predict
soil
nitrogen
(N).
This
study
explores
the
potential
of
reflectance
combined
with
machine
learning
estimate
N
levels
under
different
N-based
management
practices
in
rice-based
cropping
systems.
A
five-year
field
experiment
(2015–2020)
was
conducted
at
Kalyani
D
Block
Farm,
Bidhan
Chandra
Krishi
Viswavidyalaya,
Nadia,
West
Bengal,
India,
testing
rice-rice,
rice-wheat,
rice-potato
systems
treatments:
control
(N₀),
100%
Neem
Coated
Urea
(NCU),
75%
NCU
25%
organics,
Polymer
Sulfur
(PSCU),
PSCU
organics.
Soil
samples
from
0
15
cm
depth
were
collected
post-harvest
rabi
crops
(wheat
potato)
summer
rice
for
analysis,
revealing
highest
available
(AN)
(189.6
kg
ha−
1)
PSCU-treated
plots,
maximum
AN
wheat
(290.6
potato
(431.4
found
+
organic
plots.
Rice
yield
reached
a
high
5.58
t
1
treatment,
while
produced
3.87
16.07
vermicompost
(VC),
respectively.
Spectral
measurements
controlled
lab
environment
using
ASD
Field
Spec
4
spectroradiometer,
showing
significant
variability
spectral
behavior
carbon
(SOC)
levels.
Pre-processing
techniques,
including
first-order
derivation
(FOD),
log
(1/R)
transformation,
continuum
removal
(CR),
applied
enhance
data
quality.
Machine
models,
Support
Vector
Regression
(SVMR)
Partial
Least
Squares
(PLSR)
used
SOC,
total
(TN)
(350–2500
nm
range).
Results
showed
that
SVMR
consistently
outperformed
PLSR
all
properties,
continuum-removed
spectra
achieving
R2
values
0.98,
0.97,
0.92,
RMSEs
0.02%,
37.1,
948.8
TN,
highlights
value
integrating
rapid,
accurate
estimation,
enabling
optimized
fertilizer
applications
crop
yields
reduce
environmental
impact.
Agricultural Water Management,
Год журнала:
2024,
Номер
296, С. 108791 - 108791
Опубликована: Март 27, 2024
While
soil
nitrogen
(N)
losses
under
drip
irrigation
water
and
fertilizer
management
have
become
a
key
issue
in
global
environmental
N
pollution,
no
current
systematic
review
of
this
exists
the
literature.
Drawn
from
Web
Science
Core
Collection
database,
290
related
articles
were
identified
as
research
subjects
(1991–2022).
To
reveal
basic
characteristics,
power,
hotspots
future
perspectives
field,
an
in-depth
bibliometrics
analysis
graphical
knowledge
display
undertaken
by
using
CiteSpace
software.
By
analyzing
evolution
process
keywords,
greenhouse
gases,
use
efficiency
crop
yield
been
field
recent
years.
Irrigation
systems,
moisture,
fertigation
always
core
topics.
The
focus
on
pathways
has
gradually
shifted
nitrate
(NO3-)
leaching
alone
to
comprehensive
consideration
multiple
including
NO3-
leaching,
emissions
N2O,
NH3
NO.
corresponding
strategies
concentrating
application
amounts
diversified
methods
involving
combinations
amounts,
types.
Moreover,
development
widespread
new
technologies
exogenous
additives
further
enriched
direction
management.
Future
still
needs
explore
how
balance
high
yields
minimize
impacts,
which
will
provide
effective
for
controlling
agricultural
non-point
source
pollution
mitigating
warming.
Agronomy,
Год журнала:
2024,
Номер
14(1), С. 152 - 152
Опубликована: Янв. 9, 2024
Maximizing
rice
yield
potential
has
always
been
the
focus
of
high-yield
cultivation
research.
For
and
breeding,
more
research
into
link
between
components
is
essential.
In
this
experiment,
38
varieties
with
different
types
185
as
materials
were
chosen.
The
relationships
studied.
regulation
effects
total
nitrogen
application
rate
(TNAR)
on
observed.
results
showed
that
(1)
grain
was
189.3−195.6%,
76.1−77.7%,
27.0−28.7%
higher
than
super-low-yield,
low-yield,
medium-yield
varieties,
respectively.
Compared
other
types,
type
have
a
number
spikelets.
(2)
spikelet
per
panicle
spikelets
significantly
positively
linked
yield,
but
negatively
correlated
filled
grains
weight.
(3)
With
an
increase
in
TNAR
(0−340
kg
ha−1),
panicles,
panicle,
increased
gradually,
weight
decreased
gradually.
TNAR,
obvious
decrease
highest
under
at
250
ha−1.
main
factor
contributing
to
its
high
substantial
above
increasing
played
material
role
improving
yield.
Plants,
Год журнала:
2024,
Номер
13(10), С. 1357 - 1357
Опубликована: Май 14, 2024
Soil
quality
is
an
indicator
of
the
ability
to
ensure
ecological
security
and
sustainable
soil
usage.
The
effects
long-term
straw
incorporation
different
irrigation
regimes
on
yield
paddy
fields
in
cold
regions
remain
unclear.
This
study
established
four
treatments:
controlled
+
continuous
for
3
years
(C3),
7
(C7),
flooded
(F3),
(F7).
Analysis
was
conducted
impact
various
physicochemical
characteristics
soil.
index
(SQI)
rice
computed
using
separate
datasets
each
treatment.
nitrate
nitrogen,
available
phosphorus,
organic
carbon,
matter
contents
C7
were
93.51%,
5.80%,
8.90%,
8.26%
higher
compared
C3,
respectively.
In
addition,
treatment
5.18%,
4.89%,
10.32%
than
those
F3,
F7,
validity
minimum
data
set
(MDS)
verified
by
correlation,
Ef
ER,
which
indicated
that
MDS
all
treatments
able
provide
a
valid
evaluation
quality.
based
SQI
11.05%,
11.97%,
27.71%
Overall,
combined
with
increases
regions.
provides
thorough
assessment
concerning
preserve
food
sustainability
agricultural
output.
Additionally,
it
offers
basis
diagnosis
Northeast
China.
