Due to less rain fall this year hot environment not only impaired productivity but also increased mortality in absence of protective measures.

THERMAL COMFORT ZONE —-4 to 25 degree celcius.

It is now accepted that heat stress is major cause of loss in production and in tern the profit in dairy industry.

Environment temp., Radient energy , relative humidity, wind speed all contribute to heat stress

SIGNS OF HEAT STRESS

1. BUNCHING

2. HIGH RESPIRATORY  RATE

3. LACK OF COORDINATION

4. DECREASE IN DRY MATTER INTAKE

WE CAN DECREASE THE EFFECT OF HEAT BY ADOPTING SOME MEASURES

1.  ENVIRONMENT MODIFICATION

PROVIDE AMPLE WATER FOR ANIMAL TO DRINK

PROVISION OF SHED

A.  NATURAL SHADES  ;   By implanting shaddy tree

B. ARTIFICIAL SHADES;   Shade cloth , concrete slabs or gableroots. Metal roofs should be painted  black outsides

C. COOLING SYSTEM;  Applicationof sprinkles , mistdroplet, fogger system, cooling ponds , fans , coolers

2. NUTRITIONAL MODIFICATIONS

BY  increasing 5-7% fat in diet

By providing high quality foorage

increase sodium and potasium content

ruman specific live yeast

HEAT STRESS IN DAIRY ANIMALS

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