Download secodary nutrient in mango

Role and deficiency symptoms of micronutrients in Mango
Introduction
Improved yield in mango require balance application of
nutrients in proper form. But continuous and imbalanced
use of inorganic fertilizers affect the soil health as well
yield by:
Affecting useful soil microbes and remains of
chemical residue become toxic to plants and adversely
affecting health of the mango plant.
Role and deficiency symptoms of secondary nutrients in Mango
Introduction
Therefore, it is important to use chemical fertilizers judiciously to get
higher yield without affecting soil health.
Integrated nutrient management is a good agricultural practices
which improves yield in mango without affecting soil health.
Before adapting integrated nutrient management practice in
mango, it is utmost important to have an idea about the role
and deficiency symptoms of different elements on mango .
Therefore in this RLO you will learn the role and deficiency
symptoms of secondary nutrients on mango.
Role and deficiency symptoms of secondary nutrients in Mango
Role of calcium
 Calcium is important in the assimilation of N and
transport of carbohydrates and amino acids.
 Calcium plays an important role in the structural
functions in the cellular membranes and walls
throughout the entire plant.
 The fruits have an increased demand for Ca to maintain
pulp consistency during growth.
Role and deficiency symptoms of secondary nutrients in Mango
Role of calcium
•
Adequate calcium produced fruits firmer, with a better
appearance, better resist handling and transport and have
a lower incidence of physiological disturbance.
•
The greatest demand for Ca occurs during the postharvest flush and the initial development of the fruits.
Role and deficiency symptoms of secondary nutrients in Mango
Role of Magnesium
 Magnesium occurs in the chlorophyll molecule and in enzymes that
induce the formation of amino acids for protein synthesis. It also
participates in P transport within the plant.
 Application of excess amounts of Ca and K decrease the uptake of
Mg.
Role of sulphur
 Sulphur is the principal component of amino acids and vegetable
proteins.
 It is an enzyme activator and participates in chlorophyll synthesis.
 When deficient, mango growth is slowed and leaf loss is provoked.
Role and deficiency symptoms of secondary nutrients in Mango
Deficiency symptoms of calcium
Lower quality fruits and collapse of the internal pulp,
attributed to an imbalance between low Ca
and high N.
Reduced growth of foliage due to ca deficiency.
Its deficiency is associated with
physiological disorders like Softnose.
occurance
The apical twigs and shoots remain small and
lighter green than normal.
of
slightly
Role and deficiency symptoms of secondary nutrients in Mango
Deficiency symptoms of magnesium
Deficiency of Mg reduces development, causes
premature shedding of leaves and decreases yield.
Application of excess amounts
decrease the uptake of Mg.
of
Ca
and
K
In
the developing leaves, yellowing white areas
between the main veins on both sides of mid-rib
run parallel towards the margin.
Prominent yellowish specks first visible
sides of mid rib and follows chlorosis.
on both
Role and deficiency symptoms of secondary nutrients in Mango
Deficiency symptoms of sulphur
 Deficiency of S causes necrotic spots on a green background on
the youngest leaves, there is also premature leaf shedding.
 Sulphur availability is reduced by the continuous use of fertilizers
that do not contain S.
 When deficient, mango growth is slowed and leaf loss is provoked.
 Its availability is reduced by the continuous use of fertilizers that do
not contain S.
 Deficiency of S causes necrotic spots on a green background on
the youngest leaves, there is also premature leaf shedding.
Role and deficiency symptoms of secondary nutrients in Mango
Deficiency symptoms of sulphur
Symptoms may be similar to N deficiency and are most
often found in sandy soils that are low in organic matter
and receive moderate to heavy rainfall.
Plant stems are stiff, thin, and woody.
Higher concentration of sulphur-dioxide in the
atmosphere near brick and other industrial units burning
coal has resulted in Black tip.
Its deficiency leads to side scorching of leaves.
Role and deficiency symptoms of secondary nutrients in Mango
Let Us Sum Up
Nutrients are classified according to their importance to plants and are
categorized by Primary, Secondary and Micro nutrients.
In addition to the primary nutrients, plants also need secondary nutrients like
Sulphur (S), Calcium (Ca), Magnesium (Mg), etc.
Sulphur forms part of two important amino acids which are part of the
many building blocks of protein. Sulphur is found in B1 vitamin and
several other enzymes.
Similarly, calcium is essential for plant growth, cell division
and enlargement. Calcium is a component of cell membranes
and is important for developing the root system, shoot tips
and storage organs and magnesium occurs in chlorophyll and
is also an activator of enzymes.
These are required for plant growth in relatively smaller
quantities than primary nutrients.
Any deficiency of the secondary nutrients and
other essential elements reduce the efficiency of
primary nutrient by restricting the yield to low
levels.