Integrated%20nutrient%20management%20in%20mango

1
Role and deficiency symptoms of phosphorous in
Mango

Improved yield in mango and to maintain
sustainability of the soil, require judicious
application of phosphorous through organically
and inorganically. But continuous and imbalanced
use of phosphorous through chemical source affect
the soil health as well yield of the mango tree.
Therefore, it is important to apply phosphorous
judiciously by both organic and inorganic source
to get higher yield without affecting soil health.
Hence to have knowledge of role and deficiency
symptoms of phosphorous is important for timely
and judicious application of phosphorus in mango.
2

Objective

• After completing this lesson, you will be able to
  
• Explain the role, deficiency symptoms, and
  symptoms of excess of phosphorous in mango

3

Role of phosphorous in Mango
Phosphorus favours root system development,
production of a strong trunk, and retention and
maturation of fruits.

Improves yield and quality of fruit in mango.
Phosphorus is required to synthesis ATP, cellular
molecules engaged in respiration process to
support plant life. P is also found in other
bio-molecules such as nucleic acids, enzymes,
certain proteins and in cell membrane
phospholipids.
It increases the disease resistance in plants,
due to stout and vigorous growth.
4

Deficiency symptoms
Slowing growth, premature falling of leaves,
drying and death of branches are seen due to
phosphorous deficiency

Due phosphorous deficiency, substantial decreases
in yield are also caused.
Deficiency of P may result in a weaker root
system.
5

Deficiency symptoms
Restricting the uptake of water and nutrients.

Slowing the maturation of the fruits, which
acquire a course texture.
An early symptom is the development of reddish
purple colour on the underside of leaves, first
starting as spot, spreading over the entire leaf
with viens finally becoming reddish purple.
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Deficiency symptoms

The higher level of phosphorus in shoots of
Dashehari found favourable for flower-bud
formation.
Development of necrotic areas on the margins of
leaves which become chlorotic and sheds heavily.