Agronomy,
Год журнала:
2024,
Номер
14(12), С. 2763 - 2763
Опубликована: Ноя. 21, 2024
Humic
acid,
as
a
novel
organic
fertilizer,
has
the
potential
to
improve
soil
fertility
and
agronomic
performance
of
crops.
However,
efficacy
humic
acid
varied
in
previous
studies
mechanisms
by
which
climatic
conditions,
properties,
fertilization
regimes
regulate
it
remain
unclear.
To
test
this,
comprehensive
meta-analysis
was
conducted
evaluate
effects
across
various
environmental
agricultural
conditions.
The
results
showed
that
amendment
significantly
increased
crop
yield
12%,
nitrogen
use
efficiency
27%,
uptake
17%,
on
average.
Optimal
were
observed
regions
with
an
annual
precipitation
>
300
mm
mean
temperatures
10
°C,
soils
moderate
pH
(6
<
≤
8)
or
low
total
nitrogen.
Its
attenuated
alkaline
high
(≤1.5
g
kg⁻1)
carbon
(<10
Cash
crops
upland
cereals
superior
response
compared
paddy
rice,
optimal
application
rates
100–200
kg
ha⁻1.
This
study
quantifies
acid’s
positive
impacts
productivity
utilization
providing
empirical
evidence
for
optimizing
its
sustainable
systems,
potentially
reducing
excessive
fertilizer
associated
pollution.
Frontiers in Plant Science,
Год журнала:
2025,
Номер
16
Опубликована: Фев. 26, 2025
An
increase
in
the
amount
of
greenhouse
gases
(GHGs)
atmosphere
causes
global
warming,
and
>14%
all
GHG
emissions
come
from
agricultural
activities.
The
three
primary
atmospheric
GHGs
are
CO2,
CH4,
N2O;
therefore,
regulating
agroecosystems
is
important
for
climate
management.
Straw
return
an
environmentally
friendly
practice
that
positively
affects
crop
production
soil
fertility.
However,
its
effects
on
long-term
remain
controversial.
To
examine
impact
straw
Chinese
maize
fields,
281
data
pairs
45
publications
were
assessed
using
a
meta-analysis.
findings
demonstrated
substantial
increases
CO2
N2O
140
40%,
respectively.
Methane
increased
by
3%
after
return,
maximum
effect
value
was
2.66
at
nitrogen
rates<150
kg/hm2.
CH4
with
decrease
organic
content,
changed
negative
to
positive
concentrations
>6
g/kg.
With
rate
increase,
emission
under
initially
then
decreased.
significantly
when
rates
were<250
results
random
forest
model
showed
most
factor
affecting
corn
fields
applied,
carbon
content.
This
shows
suitable
can
achieve
mutually
beneficial
goal
guaranteeing
food
security
minimizing
adverse
environment.
