Effects of boron on growing pullets

Area of Science:

• Animal Nutrition
• Bone Physiology
• Trace Mineral Research

Background:

• Dietary minerals play a crucial role in skeletal health and bone integrity.
• Boron is an essential trace element with known impacts on bone metabolism.
• Understanding boron's effects on poultry bone biomechanics is vital for optimizing feed formulations.

Purpose of the Study:

• To investigate the impact of dietary boron on bone ash content.
• To evaluate the effects of dietary boron on the mechanical properties of major limb bones (tibia, femur, humerus, radius).
• To determine the optimal dietary boron levels for enhancing bone strength in white Leghorn pullets.

Main Methods:

• White Leghorn pullets were fed diets supplemented with varying levels of boron (50, 100, 200 mg/kg).
• Bone ash content was measured for the tibia.
• Ultimate shear force, stress, and fracture energy were assessed for the tibia, femur, humerus, and radius.

Main Results:

• Significant increases in tibia and femur shear force were observed at 50 and 100 mg/kg dietary boron.
• Tibia shear stress and femur shear fracture energy significantly increased at 50 and 100 mg/kg boron.
• Tibia bone ash content showed significant improvement at 50, 100, and 200 mg/kg boron, peaking at 50 mg/kg.

Conclusions:

• Dietary boron supplementation effectively enhances bone mechanical properties and ash content in growing pullets.
• Specific levels of boron (50-100 mg/kg) positively influence bone strength, indicating a dose-dependent effect.
• Boron supplementation warrants consideration for improving skeletal integrity in poultry production.