Transcript Integrated nutrient management in mango

Role and deficiency symptoms of potassium
in grape
Potassium plays an important role
in large number of physiological
process. High uptake of
potassium in plants is mediated
through an active uptake
mechanism.
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.
K is extremely mobile
element. It moves readily
towards meristimatic
tissues.
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.
For better crop growth and yield, K
should be given adequately. It is
therefore, important to have
knowledge about the role and
symptoms occurs due to K deficiency
in grapes.
To maintain sustainability
of soil and growth of the
vine, it is important to
supply potassium partially
through inorganic and
partially through organic
source.
Before adapting integrated nutrient
management practice in grapevine,
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:
Explain the role and deficiency symptoms of potassium
in grapevine
Role of potassium in grapevine
Potassium is an
important element for
plant growth and
development
It helps in synthesis of
amino acids, and assisted
regulation of water in plant
system
K also increases the ability of
the plant to withstand stress
conditions, such as dry, cold,
salinity and attacks of
diseases and pests.
Potassium application influenced
the cellular and tissue
differentiation and formation of
inflorescence.
Role of potassium in grapevine
Potassium influenced
transforming the vegetative
promordia.
It promotes early initiation of
floral primodia in Anab-eShahi variety.
It incases number of bunches per
vine. K increases carbohydrates
content in petiole which in turn
induces larger cluster primordia.
Deficiency symptoms
Potassium
deficiency
symptoms appeared in
early summer.
Symptoms start from the
leaf margin and the leaf
colour fades to pale or
yellow green in white
grapes
In black grapes leaf
colour fades in reddish
black.
Potassium deficiency (Treeby et.
al. 2004).
Deficiency symptoms
Marginal burning and
upward or downward
curling of the leaf edge
follow the chlorosi
Potassium deficiency
in grapes restricted
root growth.
Other less common symptoms
include reduced bunch weight,
uneven berry ripening and
blackening of leaves.
Toxicity symptoms of Potassium
Like phosphorus, high levels of
potassium do not directly affect
the vine or fruit but may limit
calcium and magnesium
uptake.
Increase grape juice pH
levels.
Potassium toxicity
symptoms