Evaluasi Kebutuhan Nutrien dan Suplementasi Zinc untuk Calon Galur Ayam IPB-D2 Fase Pre-layer: Evaluation of Nutritional Requirements and Zinc Supplementation for IPB-D2 Prospective Chicken Lines in the Pre-Layer Phase. JINTP. 2022;20(3):123-129. doi:10.29244/jintp.20.3.123-129