Functions and deficiency of Magnesium
- 1. Institute of Agriculture and Animal Science (IAAS) Prithu Technical College Deukhuri, Dang SSC-121 Essential Nutrients : Forms, Occurance, Functions and Deficiency Symptoms Essential Elements: Forms, Occurance, Functions and Deficiency Symptoms Krishna Aryal Asst. Professor (Soil Science) Krish.aryal2014@gmail.com 1
- 2. Institute of Agriculture and Animal Science (IAAS) Prithu Technical College Deukhuri, Dang SSC-121 Essential Nutrients : Forms, Occurance, Functions and Deficiency Symptoms 2 Forms and occurrence • It is absorbed in the form of the Mg2+ ion. Its conc. in plant varies from 0.1 - 0.4%. Mg content of soil • Mg as MgO is <1% in non-calcareous soils. • Dolomite Mg substitute Ca in substantial quantities in certain soil. • It exists as Mg2+ in soil solution. • Minerals are: biotite, Augite, Montmorilonite, Hornblende, Dolomite etc. Magnesium
- 3. Institute of Agriculture and Animal Science (IAAS) Prithu Technical College Deukhuri, Dang SSC-121 Essential Nutrients : Forms, Occurance, Functions and Deficiency Symptoms 3 Functions of magnesium in plants • Constituent of chlorophyll located at its centre. • Serves as a structural component of ribosomes. Mg activates the formation of polypeptide chains to form amino acids. • Required for phosphate transfer from ATP (Phosphorylation) in carbohydrate metabolism. • Activator plant enzymes which are involved in energy transfer, glycolysis, respiration, & sulfate reduction.
- 4. Institute of Agriculture and Animal Science (IAAS) Prithu Technical College Deukhuri, Dang SSC-121 Essential Nutrients : Forms, Occurance, Functions and Deficiency Symptoms 4 • It promotes uptake and translocation of phosphorus and movement of sugars within the plants. • Balances high use of K+ • Neutralizes organic acids Deficiency symptoms of magnesium • Mobile element; readily translocated from older leaves to younger plant part when supply is limited. • Interveinal chlorosis • In wheat, distinct mottling as yellowish green patches
- 5. Institute of Agriculture and Animal Science (IAAS) Prithu Technical College Deukhuri, Dang SSC-121 Essential Nutrients : Forms, Occurance, Functions and Deficiency Symptoms 5 • In alfa-alfa; leaves curl & have reddish undersides. • Leaves of sugarbeets & potatoes become stiff can brittle, veins are twisted. • Lower leaves of cotton may develop reddish purple color, which gradually turns brown and finally necrosis occurs.
- 6. Institute of Agriculture and Animal Science (IAAS) Prithu Technical College Deukhuri, Dang SSC-121 Essential Nutrients : Forms, Occurance, Functions and Deficiency Symptoms 6