Agronomy,
Год журнала:
2024,
Номер
14(10), С. 2219 - 2219
Опубликована: Сен. 26, 2024
The
rice–crab
co-culture
(RC)
system
is
a
multidimensional
integrated
farming
model
with
significant
potential
for
balancing
ecological
and
economic
benefits
in
paddy
fields.
However,
improper
nitrogen
(N)
fertilizer
application
exacerbates
greenhouse
gas
(GHG)
emissions,
degrades
water
quality,
disrupts
the
balance
of
RC
ecosystem.
Therefore,
optimizing
improving
N
management
strategies
crucial
to
maximize
its
benefits.
This
study
conducted
two-year
field
experiment
assess
impact
on
productivity,
sustainability,
systems.
Comparisons
were
made
compare
rice
crab
productions,
GHG
net
ecosystem
benefit
(NEEB)
between
monoculture
(RM)
systems
under
different
rates
(0,
150,
210,
270
kg
ha−1)
aim
identifying
optimal
rate
system.
results
showed
that
210
ha−1
improved
agronomic
traits
use
efficiency,
leading
0.4%
increase
yield
(7603.1
compared
maximum
RM
at
ha−1.
At
this
rate,
surface
quality
was
crabs,
resulting
highest
yields
(370.1
average
weights
(81.1
g).
lower
reduced
intensity
(GHGI)
by
13.7%
NEEB
reached
8597.5
CNY
ha−1,
which
1265.7%
higher
than
In
summary,
conserves
resources,
increases
yields,
reduces
thereby
synergistically
enhancing
both
Optimizing
has
greater
other
innovative
models,
efficiency
should
be
further
investigated.
Agronomy,
Год журнала:
2024,
Номер
14(5), С. 1014 - 1014
Опубликована: Май 10, 2024
This
research
was
to
examine
the
impacts
of
long-term
integrated
rice–crayfish
farming
on
soil
nutrients,
carbon
pools,
and
rice
yields
in
paddy
fields.
The
aim
establish
a
scientific
basis
for
sustainable
development
RS
northern
region
Zhejiang.
results
showed
that
change
from
monoculture
(CK)
coculture
systems
(RS)
led
24.99%
increase
5-year
average
ammonium
nitrogen
(AN),
while
nitrate
(NN),
available
potassium
(AK),
phosphorus
content
(AP)
decreased
by
28.02%,
16.05%,
28.76%,
respectively.
Moreover,
total
organic
(TOC),
easily
oxidizable
(EOC),
dissolved
(DOC),
microbial
biomass
(MBC)
exhibited
reduction
2.45%,
8.82%,
35.31%,
65.84%,
Correlation
analysis
revealed
significant
positive
correlation
between
NN,
EOC,
MBC
mode.
In
terms
yield,
yield
8.40%
compared
CK.
mean
early-maturing
varieties
reduced
13.16%,
late-maturing
6.00%.
These
shed
light
annual
variation
mode,
providing
insights
Agronomy,
Год журнала:
2024,
Номер
14(6), С. 1094 - 1094
Опубликована: Май 21, 2024
Nutrient
fertilizer
application
to
agricultural
land
has
led
greenhouse
gas
emissions
and
altered
soil
nitrogen
(N)
deposition.
In
soil,
N
can
be
degraded
in
four
ways:
entering
surface
water
through
flow,
absorption
by
plants
microorganisms,
decomposition
into
gas,
deposition
as
minerals.
This
study
proposes
the
concept
of
degradability
aims
clarify
how
farming
activities
affect
soil.
Over
260
profiles
were
excavated,
effective
depth,
coordinates,
types,
vegetation
recorded
at
each
measurement
point.
The
following
characteristics
determined
samples:
pH,
organic
matter,
total
N,
phosphorus,
potassium,
soluble
available
potassium.
sample
subjected
Pearson
correlation
analysis,
principal
component
one-way
analysis
variance.
samples
included
types:
dark
brown
black
albic
meadow
Black
exhibited
more
stable
levels
compared
with
other
three
showing
a
tendency
towards
accumulation.
Ground
was
categorized
seven
forest,
rice,
maize,
red
adzuki
bean,
grassland,
soybean,
others.
Forests
contributed
most
Conversely,
planting
maize
for
loss
forests.
provide
reference
sustainable
development
agriculture
balance
ecological
protection.
Sustainability,
Год журнала:
2024,
Номер
16(12), С. 5139 - 5139
Опубликована: Июнь 17, 2024
This
study
examines
the
fluorescence
characteristics
of
dissolved
organic
matter
(DOM)
in
soils
from
different
periods
rice–crayfish
integrated
systems
(RCISs)
China.
Utilizing
three-dimensional
excitation–emission
matrix
(3D-EEM)
spectroscopy,
investigated
hydrophobicity,
molecular
weight
distributions,
and
properties
DOM
2-,
5-,
7-year
RCIS
operations,
with
rice
monoculture
(RM)
serving
as
a
control.
The
findings
indicate
that
initial
2
years
an
RCIS,
factors
such
straw
deposition,
root
exudates,
crayfish
excretions
increase
carbon
(DOC)
release
alter
composition,
increasing
humic
acid
content
soil.
As
system
matures
at
5
years,
improvements
soil
structure
microbial
activity
lead
to
breakdown
high-molecular-weight
substances
rise
small-molecular-weight
amino
acids.
By
mark,
aquatic
ecosystem
stabilizes,
there
is
humification
index
DOM.
These
variations
are
essential
for
understanding
effects
farming
on
quality
sustainability.
Agronomy,
Год журнала:
2024,
Номер
14(10), С. 2219 - 2219
Опубликована: Сен. 26, 2024
The
rice–crab
co-culture
(RC)
system
is
a
multidimensional
integrated
farming
model
with
significant
potential
for
balancing
ecological
and
economic
benefits
in
paddy
fields.
However,
improper
nitrogen
(N)
fertilizer
application
exacerbates
greenhouse
gas
(GHG)
emissions,
degrades
water
quality,
disrupts
the
balance
of
RC
ecosystem.
Therefore,
optimizing
improving
N
management
strategies
crucial
to
maximize
its
benefits.
This
study
conducted
two-year
field
experiment
assess
impact
on
productivity,
sustainability,
systems.
Comparisons
were
made
compare
rice
crab
productions,
GHG
net
ecosystem
benefit
(NEEB)
between
monoculture
(RM)
systems
under
different
rates
(0,
150,
210,
270
kg
ha−1)
aim
identifying
optimal
rate
system.
results
showed
that
210
ha−1
improved
agronomic
traits
use
efficiency,
leading
0.4%
increase
yield
(7603.1
compared
maximum
RM
at
ha−1.
At
this
rate,
surface
quality
was
crabs,
resulting
highest
yields
(370.1
average
weights
(81.1
g).
lower
reduced
intensity
(GHGI)
by
13.7%
NEEB
reached
8597.5
CNY
ha−1,
which
1265.7%
higher
than
In
summary,
conserves
resources,
increases
yields,
reduces
thereby
synergistically
enhancing
both
Optimizing
has
greater
other
innovative
models,
efficiency
should
be
further
investigated.
