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Integrated nutrient management in mango_2_ by pptfiles

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									     Role and deficiency symptoms of Nitrogen in
     grape

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.
Objective

     After completing this lesson, you will be
     able to :

       Learn the role, deficiency and toxicity symptoms of nitrogen
                                                      in grapevine
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 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.
   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.
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.
    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;
                                         A nitrogen deficient leaf
                                         compared to a healthy leaf
 Vines low in nitrogen generally
 display low vigor and poor
 production, as a result of
 reduced protein synthesis and
 photosynthesis.
    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.
  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.

								
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