Transcript Role and deficiency symptoms of Nitrogen in grape

Role and
deficiency
symptoms of
Nitrogen in
grape
Role and deficiency symptoms of Nitrogen in grape
Introduction
Nitrogen is an important building block of
proteins, nucleic acids and other cellular
constituents which are essential for all
forms of life. Nitrogen is such an important
key nutrient element for plants that it
warrants careful management, and – if
mismanaged – can lead to severe
environmental problems.
In most of Indian soil nitrogen is found to be
deficient consequently reduces production
and productivity of many crops, so it is
necessary to know about role, deficiency and
toxic effect of nitrogen to tackle the ill effects
of nitrogen in crop plants.
Role and deficiency symptoms of Nitrogen in grape
Role of Nitrogen in grapevine
Nitrogen helps in synthesis of
chlorophyll, proteins, nucleic acid,
coenzymes amino acid, sugars,
amines, polypeptides etc.
Nitrogen application induced
vegetative growth.
Nitrogen is essential for
vine growth, productivity
and fruit quality.
Nitrogen affect bunch size, berry
size,, number of bunches etc.
Role and deficiency symptoms of Nitrogen in grape
Role of Nitrogen in grapevine
Vines use nitrogen to build many compounds
essential for growth and development. Among
these are amino acids, nucleic acids, proteins
(including all enzymes), and pigments,
including the green chlorophyll of leaves and
the darkly colored anthocyanin of fruit.
Nitrogen (N) is involved in almost
every metabolic process occurring in
the growth of grapevines, including
the development of berries.
Nitrogen consists of about 1-2%
of the total dry mass of a
grapevine.
Role and deficiency symptoms of Nitrogen in grape
Deficiency symptoms
N deficiency reduced yield long before
deficiency symptoms are visible.
Deficiency of N causes chlorosis
and stunted growth of vine.
Decrease in green colour and
yellowing of leaves are some
major characters of N deficiency
in grape.
Role and deficiency symptoms of Nitrogen in grape
Deficiency symptoms
The higher N decreases TSS
content in Thompson Seedless
Ana-e-Shahi and Kandhari grape
variety.
The higher N increase acidity in
juices of Thompson Seedless.
Role and deficiency symptoms of Nitrogen in grape
Deficiency symptoms
Generally, deficiencies of the nitrogen
which is mobile element in plant and soil
appear on older or mid shoot leaves.
Vines deficient in nitrogen will display
General fading of green leaf color with mild
deficiency; Pronounced leaf yellowing or
chlorosis with severe deficiency;
Vines low in nitrogen generally display low
vigor and poor production, as a result of
reduced
protein
synthesis
and
photosynthesis.
A nitrogen deficient leaf
compared to a healthy leaf
Role and deficiency symptoms of Nitrogen in grape
Deficiency symptoms
Vines low in nitrogen generally
display
low
vigor
and
poor
production, as a result of reduced
protein synthesis and photosynthesis.
This symptom is indicative of a
lack of chlorophyll content in the
leaves, which is evidence of
reduced photosynthetic capacity.
Role and deficiency symptoms of Nitrogen in grape
Toxicity symptoms
Vines with high or excessive nitrogen
can also have an adverse effect on
productivity of the vine, due to
vigorous growth of vegetative parts
leading to shading and subsequent
reduction in fruit set and poor bud
fertility.
Vigorous shoot tips can provide a
stronger “sink” than the flower
clusters
for
carbohydrates,
nitrogenous compounds, and
hormones necessary for good fruit
set.
Fruit maturation is delayed.