The vitelline membrane is the ๐ญ๐ซ๐๐ง๐ฌ๐ฉ๐๐ซ๐๐ง๐ญ ๐๐ง๐ ๐๐ฅ๐๐ฌ๐ญ๐ข๐ ๐ฅ๐๐ฒ๐๐ซ ๐ญ๐ก๐๐ญ ๐ฌ๐ฎ๐ซ๐ซ๐จ๐ฎ๐ง๐๐ฌ ๐ญ๐ก๐ ๐ฒ๐จ๐ฅ๐ค ๐ข๐ง ๐๐ง ๐๐ ๐ , protecting it from external damage and regulating the exchange of gases and water. The ๐ฏ๐ข๐ญ๐๐ฅ๐ฅ๐ข๐ง๐ ๐ฆ๐๐ฆ๐๐ซ๐๐ง๐ ๐ซ๐ฎ๐ฉ๐ญ๐ฎ๐ซ๐ ๐๐จ๐ซ๐๐ refers to the amount of force required to break or tear this membrane.
Several factors can influence the rupture force of the vitelline membrane, including:
๐๐ ๐ ๐จ๐ ๐ญ๐ก๐ ๐๐ ๐ : As an egg ages, the vitelline membrane tends to weaken, leading to a lower rupture force.
๐๐ญ๐จ๐ซ๐๐ ๐ ๐๐จ๐ง๐๐ข๐ญ๐ข๐จ๐ง๐ฌ: The way eggs are stored, particularly temperature and humidity, can affect membrane strength.
๐๐ซ๐๐๐ ๐จ๐ ๐ญ๐ก๐ ๐ก๐๐ง: Different breeds may produce eggs with varying vitelline membrane strengths.
๐๐ฎ๐ญ๐ซ๐ข๐ญ๐ข๐จ๐ง: The henโs diet can influence the strength of the membrane. For example, certain vitamins and minerals may contribute to membrane robustness.
๐๐ ๐ ๐ฌ๐ข๐ณ๐: Larger eggs tend to have weaker membranes compared to smaller eggs, as the membrane must cover a larger yolk.
๐ In an experimental trial conducted at Zootest, France in 2023, commercial layers in two treatment groups were given Poulsil at a dose of 150 g/ton and 450 g/ton of feed from 26 to 30 weeks of age whereas the control group did not receive Poulsil. Eggs produced by the treatment groups demonstrated significantly greater vitelline membrane rupture force at 30 weeks compared to the eggs from the control group.
๐๐ข๐ญ๐๐ฅ๐ฅ๐ข๐ง๐ ๐๐๐ฆ๐๐ซ๐๐ง๐ ๐๐ฎ๐ฉ๐ญ๐ฎ๐ซ๐ ๐ ๐จ๐ซ๐๐ (๐ฆ๐):
- T1: Control โ 47.33
- T2: Control + Poulsil (150 g/ton) – 48.72
- T3: Control + Poulsil (450 g/ton) – 49.17
A stronger vitelline membrane rupture force is a crucial sign of an egg’s freshness and quality, as the membrane weakens with age or poor storage conditions. It also plays a vital role in food safety by preventing yolk contamination. In poultry breeding and hatchery operations, its durability is critical for ensuring the protection of the developing embryo.
Experimental setup:
Result:
