![]() The pH of the blood becomes alkaline, and the bicarbonate becomes less available for formation of calcium carbonate in eggshell secretory cells of the uterus. This causes the lowering of CO2 in the blood and produces a condition termed “respiratory alkalosis”. During exposure to warm environmental temperature, the hen reacts by increasing its rate of breathing (panting) to cool itself. Reason behind increased egg breakage in summerĬalcium carbonate is formed by using bicarbonate ion and serum calcium. So, what are the real reasons for eggshell breakage on hot summer days? The bicarbonate part of sodium bicarbonate does not enter serum to synthesize calcium carbonate. Here sodium bicarbonate only supplies sodium ion after buffering in the intestine to manage dietary electrolyte balance. Several factors contribute to the breakage at the point of lay.ĭespite the best possible managemental practices and proper supplementation of calcium, phosphorus, vitamin D3, breakage is increased due to suboptimal deposition of calcium carbonate which is almost 94-97% of the eggshell.įor ages farmers have added extra sodium bicarbonate in feed or water thinking that supplementation of bicarbonates may increase the synthesis of calcium carbonate. It is approximately 3.5 % at the point of lay (Eggleton and Ross, 1971) and can further increase by a few percentages during summer. The occurrence of shell breakage can be categorized into several stages. It is estimated that the incidence of broken eggs range from 6 to 8%. Controlling the cost of production becomes very important during summer when breakage of eggs is significantly increased. In the current scenario when the cost of feed ingredients, especially the prices of soya meal and corn are soaring, counting each penny invested in the production of egg is very important. ![]()
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