Soil pH and Nutrient Stoichiometry as Key Drivers of Phosphorus Availability in Crop Rotation Systems
Agronomy,
Год журнала:
2025,
Номер
15(5), С. 1023 - 1023
Опубликована: Апрель 24, 2025
Crop
rotation
systems
profoundly
influence
soil
phosphorus
(P)
dynamics
through
physicochemical
and
microbial
interactions.
The
mechanisms
regulating
P
availability
under
various
rotational
practices
remain
poorly
understood.
This
five-year
field
experiment
investigated
the
effects
of
four
(WM:
wheat–maize;
WP:
wheat–peanut;
WS:
wheat–soybean;
MV:
maize–hairy
vetch)
on
fractions,
phosphatase
activities,
P-cycling
gene
abundance,
their
interactions
with
properties.
WM
substantially
reduced
pH
(6.29)
while
increasing
labile
fractions
(Ca2-P)
moderately
(Al-P,
Fe-P,
Ca8-P),
which
was
attributed
to
enhanced
acid
activity.
WP
elevated
(8.13)
but
due
calcium–P
immobilization.
MV
stimulated
cycling,
exhibiting
highest
phoD
(2.01
×
106
copies
g−1)
phnK
(33,140
linked
green
manure-induced
activation.
Redundancy
analysis
identified
pH,
total
nitrogen,
stoichiometric
ratios
(C/N
N/P)
as
key
shared
drivers
enzymatic
Partial
least
squares
path
modeling
(PLS–PM)
indicated
that
crop
directly
regulated
modulation
(r
=
−0.559
***)
C/N
ratio
0.343
indirectly
Lower
(<10)
across
all
regimes
amplified
carbon
limitation
in
process
transformation,
indicating
exogenous
inputs
appropriate
stoichiometry
should
be
optimized.
results
this
study
inform
selection
suitable
patterns
for
sustainable
agriculture.
Язык: Английский
Role of Wilting Time on the Chemical Composition, Biological Profile, and Fermentative Quality of Cereal and Legume Intercropping Silage
Fermentation,
Год журнала:
2024,
Номер
10(9), С. 448 - 448
Опубликована: Авг. 28, 2024
Agricultural
production
in
the
Azores
primarily
focuses
on
livestock
sector,
notably,
dairy
production,
where
cows
graze
year-round
a
rotational
system.
To
maintain
pasture
productivity,
farmers
often
rely
synthetic
nitrogen
fertilizers,
which
have
adverse
environmental
impacts
like
ammonia
emissions
and
nitrate
leaching.
Alternatively,
nitrogen-fixing
crops
legumes
are
explored
as
green
manures
to
enhance
soil
quality
reduce
dependence
chemical
fertilizers.
The
traditional
practice
of
using
mixed
forages
grasses,
known
“outonos”
or
intercrops,
has
been
crucial
but
is
declining
over
time.
These
mixtures
include
plants
such
lupins,
Vicia
faba,
oats,
vetch,
noted
for
their
adaptability
ability.
Due
high
perishability
these
crops,
effective
conservation
strategies
ensiling
essential
preserve
forage
nutritional
through
controlled
fermentation.
This
study
evaluates
productivity
intercrop
Azores,
focusing
fresh
samples
silage
prepared
with
wilting
times
0,
24,
48,
96
h,
followed
by
comprehensive
analyses.
Results
showed
significant
changes
fiber
components
(neutral
detergent
fiber,
acid
lignin)
increased
time,
leading
reduced
digestibility.
However,
improved
dry
matter
content.
Язык: Английский
Wheat productivity and nitrogen use efficiency in no-till systems: a comparative analysis of crop-pasture and continuous cropping rotations in Uruguay
Frontiers in Sustainable Food Systems,
Год журнала:
2024,
Номер
8
Опубликована: Дек. 23, 2024
Introduction
Uruguayan
agriculture’s
transition
to
no-till
farming
and
intensified
practices,
replacing
crop-pasture
(CP)
systems
with
continuous
cropping
(CC)
rotations,
has
disrupted
biological
nitrogen
fixation
(BNF).
Despite
this,
diversified
sequences,
including
C4
species,
have
maintained
the
soil
organic
carbon
(SOC)
balance
under
management,
limited
overall
impacts
on
productivity
sustainability.
The
effects
of
these
changes
wheat
use
efficiency
(NUE)
need
be
further
investigated.
Methods
This
study,
conducted
within
a
long-term
experiment
(LTE)
rainfed
conditions,
compared
in
CP
CC
rotations.
Wheat
following
were
analyzed
over
three
seasons.
Variables
measured
included
(N)
concentration,
grain
yield
(WGY),
protein
concentration
(GPC),
NUE.
Four
N
fertilizer
levels
applied
each
rotation
system
assess
their
impact.
Results
consistently
outperformed
WGY,
2425
1668
kg
ha
−1
averages,
respectively.
showed
slightly
higher
GPC
(10.92%)
than
(10.48%).
Nitrate-N
at
tillering
positively
correlated
WGY
negatively
GPC,
but
relationship
differed
by
rotation.
Soil
NUE
indices
Discussion
study’s
findings
highlighted
potential
rotation,
especially
when
species
crop
sequence,
achieve
short
term
due
healthier
conditions
seeded
after
post-pasture
CP.
Additionally,
our
study
highlights
that
effect
previous
was
more
relevant
expected
residual
pasture
phase
CP,
primarily
quality
residues
temporary
adverse
compaction
caused
livestock
trampling.
Язык: Английский