In
order
to
detect
the
types
and
quantities
of
pests
in
rice
fields
quickly
accurately,
a
lightweight
target
pest
detection
method
SSD_RA
based
on
SSD
algorithm
is
proposed.
deal
with
problems
high
missed
rate,
inaccurate
positioning,
slow
speed,
large
number
model
parameters
low
accuracy
model,
ResNet
feature
extraction
network
was
introduced
optimized.
The
first
prediction
layer
connected
Conv3_x
module
network,
all
layers
after
were
dropped.
reduced,
so
that
more
lightweight,
speed
improved,
redundant
features
are
reduced
ensure
model.
addition,
aiming
at
characteristics
small
target,
structure
adjusted,
output
underlying
Conv2_x
layer.
candidate
box
each
cell
new
6,
which
accurately
divides
boundaries
large,
medium
boxes.
experimental
results
show
mAP
improved
this
paper
84.1%,
23.4
percentage
points
higher
than
original
reasoning
time
CPU
GPU
environment
0.056s
0.009s,
0.101s
0.005s
faster
size
51.9MB.
It
about
7/100
Compared
other
models,
7.8
4.2
EfficientDet
RFCN,
respectively.
effective
detecting
insect
reduces
rate.
Aquaculture Reports,
Год журнала:
2023,
Номер
29, С. 101515 - 101515
Опубликована: Фев. 27, 2023
The
integrated
rice-crayfish
culture
(IRCC)
mode
has
been
developed
for
more
than
twenty
years
in
China,
but
little
information
could
be
obtained
on
the
microbial
communities
paddy
soil
under
this
mode.
This
study
used
16SrRNA
and
ITS
Illumina
high-throughput
sequencing
to
investigate
communities,
diversity,
function
different
IRCC
times
(0,
2,
4,
6,
10
years).
With
increasing
time,
altered
relative
abundance
of
dominant
taxa,
showing
a
significant
decrease
Actinobacteria
Chytridiomycota,
with
an
increase
Proteobacteria
Firmicutes.
species
richness
diversity
bacteria/fungi
10-year
were
significantly
lower
other
groups
(P
<
0.05).
Bacterial
functional
potential
prediction
by
PICRUSt2
phenotype
BugBase
showed
that
long-term
reduced
carbohydrate
metabolism
increased
pathogenic
anaerobic
Saprotrophs
pathotrophs
dominated
fungal
higher
abundances
plant
pathogens,
parasites
lichen
pathogens
found
(2-
4-year)
Microbial
mainly
influenced
ammonium
nitrogen,
nitrate
moisture
content,
total
carbon.
Long-term
change
functions,
while
reducing
soil.
A
"resting
period"
is
recommended
ensure
sustainable
development
ecological
agriculture
fields.
This
research
was
to
examine
the
impacts
of
long-term
rice-crayfish
coculture
systems(RS)
on
soil
nutrients,
carbon
pools,
and
rice
yields
in
paddy
fields
,
aiming
establish
a
scientific
basis
for
sustainable
development
RS
northern
region
Zhejiang.
The
results
showed
that
change
from
monoculture
(CK)
resulted
24.99%
increase
5-year
average
ammonium
nitrogen(AN),
while
nitrate
nitrogen(NN),
available
potassium(AK),
phosphorus
content(AP)
decreased
by
28.02%,
16.05%,
28.76%
respectively.
Moreover,
total
organic
carbon(TOC),
easily
oxidizable
carbon(EOC),
dissolved
carbon(DOC),
microbial
biomass
carbon(MBC)
2.45%,
8.82%,
35.31%,
65.84%
Correlation
analysis
there
significant
positive
correlation
between
NN,
EOC
MBC
RS.
In
terms
yield,
yield
has
8.4%
compared
CK.The
planting
early-maturing
varieties
reduced
13.16%,
late-maturing
6.00%.
conclusion,
enhancing
water
nutrient
management
cultivating
late
maturing
are
essential
strategies
achieving
