Pengaruh PenggunaanAtap Kandang Plastik UV (ultra violet) dan Program Pemberian Ransum TanpaAntibiotik terhadap Performans Pubertas Ayam Ras Petelur Periode Grower(The Effect of Ultra Violet (UV) Plastic Roof and Non-antibiotic Diet on SexualMaturity Performance of Growing Period Laying Hens)