How important is an eggshell? A 1% increase in breakage rate can cost over $3,000 annually for 10,000 laying hens! Frequent issues like thin shells, sandy shells, or cracked eggs? ZHENGZHOU OUKE MACHINERY CO., LTD. offers targeted solutions across nutrition, management, and disease control to help you achieve “egg beauty” effortlessly.
1. Nutritional Formulation: Building Stronger Shells
① Calcium-Phosphorus Ratio: The Golden 5:1~6:1
Calcium: 3.5%-4.0% during laying period (60% granular calcium, e.g., oyster shells or limestone). Nighttime feeding directly supplements calcium for shell formation.
Phosphorus: 0.35%-0.4% available phosphorus (total phosphorus 0.55%-0.65%). Low phosphorus weakens shells; excess blocks calcium absorption (avoid overusing bran or high-phosphorus ingredients).
② Vitamins & Trace Minerals
Vitamin D3: Boosts calcium absorption. Deficiency reduces shell thickness by 20%-30%.
Vitamin A: Maintains oviduct mucosa integrity, reducing sandy shells.
Zinc: Critical for shell membrane formation. Zinc methionine recommended to prevent thin/rough shells.
Manganese: Organic Mn (e.g., Mn-methionine) prevents porous/fragile shells.
Selenium: Enhances shell strength; deficiency increases white-shelled eggs.
2. Management: Minimizing “Physical Damage”
① Environmental Stress: The Silent Enemy
Temperature >28°C: Reduces shell thickness by 5%, raises breakage by 30%. Use cooling pads + fans to limit temperature fluctuations ≤3°C.
Lighting Disruptions: Sudden power outages or irregular light cycles cause oviduct spasms, leading to deformed eggs. Use backup power + timed lighting controllers.
Handling Stress: Frequent disturbances disrupt shell gland secretion. Designate 1 fixed day weekly for flock management.
② Equipment Optimization: Protecting Eggs
Egg Collection: Adjust conveyor belt slope to 8°-10° (steeper slopes increase collisions). Inspect egg trays every 2 hours; target breakage <1%.
Waterers: Leaky nipples cause moldy eggs. Clean weekly with specialized tools; keep leakage <5%.
Cage Design: Wire spacing 2.5cm×5cm (too narrow traps eggs; too wide causes rolling). Grind sharp welds to reduce mechanical damage.
3. Disease Control: Tackling Internal Flaws
① Oviductitis: The Beauty Killer
Symptoms: Blood-stained shells, speckled/misshapen eggs, 10%+ drop in lay rate.
② Viral Diseases: Shell Destroyers
Infectious Bronchitis (IB): Nephropathogenic IB in young hens causes permanent oviduct damage (“rough-shelled eggs”). No cure—cull affected birds.
Avian Influenza/Newcastle Disease: Triggers pale/fragile shells. Monitor HI antibody titers (>8 log2); vaccinate promptly with H9N2+IB+ND combo vaccines.
③ Parasites: Nutrient Thieves
Coccidia/Roundworms: Damage gut lining, impair calcium absorption, and increase sandy shells.
ZHENGZHOU OUKE MACHINERY CO., LTD. – Your Partner in poultry Excellence!