Transcript Integrated nutrient management in mango

Role and deficiency symptoms of potassium
in Mango
Potassium is known to
activate at least sixty
enzymes involved in plant
growth and this may be its
most important function in
the plant.
Potassium is also known as
the quality nutrient because
of its important effects on
quality factors such as size,
shape, color, taste, shelf life,
fiber quality and other quality
measurements.
Plants deficient in
potassium are less resistant
to drought, excess water,
and high and low
temperatures. They are also
less resistant to pests,
diseases and nematode
attacks.
Potassium plays a vital role in
photosynthesis, translocation of
photosynthates, protein synthesis,
control of ionic balance, regulation of
plant stomata and water use,
activation of plant enzymes, and,
many other processes.
Potassium plays a vital role in
photosynthesis, translocation of
photosynthates, protein synthesis,
control of ionic balance, regulation of
plant stomata and water use,
activation of plant enzymes, and,
many other processes.
To maintain sustainability
of soil and growth of the
tree it is important to
supply potassium partially
through inorganic and
partially through organic
source.
Before adapting integrated nutrient
management practice in mango, it is
important to know the role and
deficiency symptoms of potassium
on mango . Therefore in this RLO
you will learn the role and deficiency
symptoms of potassium on mango.
Objective
After completing this lesson, you will be able to :
Describe the role, symptoms of deficiency and
excess of potassium in mango
Role of potassium in Mango
The quality of the fruits,
especially coloration of
the skin, aroma, size,
and shelf life, is
improved when there is
adequate K.
K also increases the ability
of the plant to withstand
stress conditions, such as
dry, cold, salinity and attacks
of diseases and pests.
It is essential for formation and
synthesis of proteins and CHO
in plants.
Role of potassium in Mango
It helps in formation of stiff
stems and healthy root
system.
Also promotes cell formationhighly mobile in plants.
The quality of the fruits,
especially coloration of the
skin, aroma, size, and shelf life,
is improved when there is
adequate K.
It counteracts the adverse
effects of excessive
nitrogen.
Deficiency symptoms
Potassium deficiency
symptoms occur in the oldest
leaves as small red spots,
irregularly distributed.
The leaves are smaller and
thinner than normal. With a
more pronounced shortage
of K, the spots coalesce
and the leaf suffers necrosis
along the edges.
Leaf necrosis on older leaves
Deficiency symptoms
The leaves fall only when
they are completely dead.
K deficiency caused
die back which proved
fatal to the plants.
Tip burn and marginal
necrosis are the main
symptoms of K
deficiency.
Marginal necrosis
Deficiency symptoms
Scattered yellow spot,
necrotic areas along the
margin of small thin
leaves.
An excess of K may
cause an imbalance in
the levels of Ca and
Mg, which also causes
browning along the
edges and apex of the
older leaves.
Potassium deficiency
on older leaf