Kirkuk University Discusses Impact of Potato Starch Waste in Laying Hens

The College of Agriculture discussed a PhD thesis titled:
"Effect of Potato Starch Industry Waste with/without Enzyme Mixture as Partial Substitute for Yellow Corn on Productive Performance and Blood Biochemical Traits of Laying Hens."

Thesis Overview

• Researcher: Alaa Yassin Taha

• Objective:
  Study the effect of partially replacing yellow corn with potato starch waste (with/without enzyme mixture) as an energy source on:

  • Production performance

  • Egg quality traits

  • Blood biochemical parameters
    in brown Lohmann laying hens.

Methodology

• Tested replacement levels: 50% and 75% potato starch waste

• Added enzyme mixture (protease, amylase, xylanase) to enhance digestibility

• Monitored over 10-week production cycle

Key Findings

1. Significant improvements in all studied traits at both replacement levels (50% and 75%) when combined with enzymes:

   • ↑ Feed conversion ratio (FCR)

   • ↑ Egg production rate (+8.3% at 75% replacement)

   • ↑ Eggshell thickness and Haugh units (egg quality)

2. Enhanced nutrient utilization:

   • ↓ Serum cholesterol and triglycerides

   • ↑ Calcium and phosphorus retention

3. Without enzymes:
   Reduced performance at >50% replacement

Significance

Demonstrates sustainable use of potato processing waste to:

• Reduce feed costs by replacing 50-75% corn

• Maintain hen productivity with enzyme supplementation

• Address environmental waste management challenges