Transcript nitrogen

Role and deficiency symptoms of Nitrogen in
Mango
Improved yield in mango
require balance application of
nutrients in proper form. But
continuous and imbalanced use
of inorganic fertilizers affect the
soil health as well yield by:
Affecting useful soil microbes
and remains of chemical
residue become toxic to plants
and adversely affecting health
of the mango plant.
Therefore, it is important
to use chemical fertilizers
judiciously to get higher
yield without affecting soil
health. Integrated nutrient
management is a good
agricultural practices
which improves yield in
mango without affecting
soil health.
Before adapting integrated nutrient
management practice in mango, it is utmost
important to have an idea about the role and
deficiency symptoms of different elements on
mango . Therefore in this RLO you will learn the
role and deficiency symptoms of nitrogen on
mango.
Objective
After completing this lesson, you will be
able to :
Learn the role, deficiency and toxicity symptoms of
nitrogen in mango
Role of Nitrogen in Mango
Nitrogen is one of the most
important nutrients for the
growth of mango and it has a
relevant role in the production
and quality of the fruits.
It increases the chlorophyll
content in the leaves which in
turn determines the synthesis
of carbohydrates.
It increases the CEC of
roots and makes them
more efficient in absorbing
other nutrients.
Role of Nitrogen in Mango
It has a relevant role in
the production and
quality of the fruits.
Mango leaves with
more than 1.2% N were
associated with fruits
that had greenish spots
on reddish skin.
Nitrogen effects are
seen principally in
the vegetative
phase of growth
Nitrogen application
induced flowering in the
following years.
Role of Nitrogen in Mango
Induced early flush and
encouraged flowering.
Early flowering
Nitrogen application
increases yield and
quality of fruits in
mango.
Adequately
nourished mango
with N regularly
develop shoots, and
have viable panicles
able to bear fruit.
Heavy bearing
Deficiency symptoms
The most striking symptoms
are severe retardation of
growth, yellow and undersized leaves. The fruit set
is greatly reduced and leaves
mature without attaining
normal size.
The incidence of physiological
disease like softnose is
increased with increase in
nitrogen fertilization.
The symptoms first
appear near the base of
current growth and
progress towards the tip.
Under the
acute
deficiency, the fruit size
greatly reduced, tended
to ripe and drop
prematurely.
Deficiency symptoms
Nitrogen deficiency
may adversely affect
yield.
Lack of nitrogen
causes retarded
development, less
vegetative growth
and reduced
production of fruits.
Due to nitrogen deficiency
relatively small fruit set
associated with leaves that
matured without attaining
normal size.
Reduced fruit size
Deficiency symptoms
The deficiency symptoms
first appeared near the
base of current years
growth, and progressed
towards the tip, new
leaves fails to attain
normal size.
Leaf stalks tended to
form narrow angles with
the stem.
Fruit ripens
prematurely and
drop prematurely.
Nitrogen deficiency
caused reduced leaf
area and general
yellowing
Toxicity symptoms
Mango leaves with more than
1.2% N were associated with
fruits that had greenish spots
on reddish skin.
Excess of nitrogen causes
excessive vegetative growth,
difficulty at floral
differentiation, loss of yield
and fruit quality, and an
increased susceptibility to
disease.