A
expansão
de
áreas
pastagens
e
cana-de-açúcar
no
Brasil
segue
um
modelo
produção
agrícola
que
tem
uma
forte
dependência
insumos
agroquímicos,
como
fertilizantes
agrotóxicos,
ameaçam
constantemente
a
qualidade
dos
ecossistemas
aquáticos.Nesta
pesquisa,
os
efeitos
do
manejo
solo
em
extensivas
(PE),
intensivas
(PI)
culturas
(C)
foram
avaliados
estudo
campo
escala
realista
partir
monitoramento
treze
mesocosmos
aquáticos
inseridos
nos
tratamentos
PE,
PI
C
durante
392
dias.O
recomendado
para
cada
das
foi
simulado,
preparação
solo,
aplicação
fertilizantes,
agrotóxicos
(2,4-D,
fipronil)
vinhaça,
bem
pastagem
gado.Os
impactos
três
na
água
considerando
dimensões:
1)
disponibilização
nutrientes
metais
ecossistêmicos
aquáticos;
2)
ecotoxicológicos
utilizando
o
cladócero
Ceriophania
silvestrii
bioindicador
aquático,
dicotiledônea
Eruca
sativa
fitotoxicidade
água,
díptero
Chironomus
sancticaroli
sedimento;
3)
Avaliação
risco
ecológico
perda
serviços
associadas
essas
áreas.Os
resultados
obtidos
demonstraram
acarretaram
deterioração
da
com
redução
pH
oxigênio
dissolvido
ao
longo
tempo
aumento
concentrações
fósforo,
nitrogênio,
potássio,
alumínio
manganês,
especialmente
após
vinhaça
cana-deaçúcar.A
presença
2,4-D
(<
97
µg
L
-1
)
fipronil
0,21
capazes
alterar
fecundidade,
sobrevivência
fêmeas
taxa
intrínseca
população
C.
C;
germinação
crescimento
parte
aérea
E.
sativa.Para
sancticarolli,
não
observadas
mudanças
significativas
mortalidade,
comprimento
corpo,
biomassa
fresca
peso
seco
livre
cinzas,
deformidades
mentum.O
maior
PI,
nessa
ordem,
comparação
tratamento
associado
concentração
pelo
agrotóxico
aos
alumínio,
manganês
Esses
potenciais
ecossistêmicos,
biodiversidade.Esperase,
conclusão
desta
auxiliar
identificação
fatores
associados
às
práticas
adotadas
cana-de-
Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: March 12, 2024
Abstract
Lead
(Pb)
is
toxic
to
the
development
and
growth
of
rice
plants.
Nanoparticles
(NPs)
have
been
considered
one
efficient
remediation
techniques
mitigate
Pb
stress
in
Therefore,
a
study
was
carried
out
examine
underlying
mechanism
iron
(Fe)
silicon
(Si)
nanoparticle-induced
toxicity
alleviation
seedlings.
Si–NPs
(2.5
mM)
Fe-NPs
(25
mg
L
−1
)
were
applied
alone
combination
plants
grown
without
(control;
no
stress)
with
(100
µM)
concentration.
Our
results
revealed
that
severely
affected
all
growth-related
traits,
such
as
inhibited
root
fresh
weight
(42%),
shoot
length
(24%),
chlorophyll
b
contents
(26%).
Moreover,
substantial
amount
translocated
above-ground
parts
plants,
which
caused
disturbance
antioxidative
enzyme
activities.
However,
synergetic
use
Fe-
reduced
upper
part
by
27%.
It
lethal
impact
on
roots
shoots
parameters
increasing
(40%),
(48%),
(31%).
Both
Si
Fe–NPs
synergistic
application
significantly
elevated
superoxide
dismutase
(SOD),
peroxidase
(POD),
catalase
(CAT),
glutathione
(GSH)
concentrations
114%,
186%,
135%,
151%,
respectively,
compared
subjected
alone.
The
resulted
several
cellular
abnormalities
altered
expression
levels
metal
transporters
antioxidant
genes.
We
conclude
can
be
deemed
favorable,
environmentally
promising,
cost-effective
for
reducing
deadliness
crops
reclaiming
Pb-polluted
soils.
Heliyon,
Journal Year:
2024,
Volume and Issue:
10(16), P. e35593 - e35593
Published: Aug. 1, 2024
Seasonal
variations
directly
impact
the
biochemical
and
microbial
properties
of
soil,
influence
carbon
nutrient
cycling
within
soil
system.
Soils
under
tree
plantation
(TP)
are
rich
in
organic
matter
population,
making
them
more
susceptible
to
seasonal
variation.
We
studied
effect
chemical
(pH,
electrical
conductivity
(EC),
total
(TOC),
nitrogen
(TN),
C/N
ratio
etc)
microclimate
(moisture
temperature)
on
respiration
(SR),
biomass,
(C)
utilization
efficiency
13
years
old
Kadamb
(
Agronomy,
Journal Year:
2023,
Volume and Issue:
13(7), P. 1754 - 1754
Published: June 28, 2023
The
bioavailability
and
mobility
of
copper
(Cu)
in
soil
play
a
crucial
role
its
toxicity
impact
on
organisms.
Humic
substances,
with
their
abundant
functional
groups
unique
pore
structure,
have
demonstrated
the
ability
to
effectively
mitigate
toxic
effects
heavy
metals
soil.
This
study
explores
potential
soluble
humic
substance
(HS)
derived
from
leonardite
for
Cu
removal
contaminated
soils.
various
washing
conditions,
such
as
concentration
cycles,
efficiency
were
assessed.
results
showed
that
single
HS
solution
achieved
an
optimal
37.5%
soil,
subsequent
reuse
achieving
over
30.5%.
To
further
enhance
efficiency,
two-step
approach
using
chemical
reductant
NH2OH·HCl
coupled
(NH2OH·HCl
+
HS)
was
employed,
resulting
increased
53.0%.
Furthermore,
this
significantly
reduced
plant
availability
bioaccessibility
by
13.6%
11.4%,
respectively.
Compared
NH2OH·HCl,
both
pH
organic
matter
content.
These
findings
suggest
soil-washing
removed
polluted
demonstrates
substances
environmentally
friendly
materials
remediating
metal-polluted
promoting
green
sustainable
applications
remediation
practices.
