Nitrogen Intake and Excretion in Male Kacang Goats Receiving Feed With Different Energy Levels

Abstract

This study aims to determine the nitrogen intake and excretion status of male Kacang goats that receive feed with different energy levels. The study was conducted for three months in the livestock experimental pen of the Faculty of Agriculture, Science and Health, University of Timor Kefamenanu, North Central Timor Regency. Nine male Kacang goats with an initial body weight of 11 to 13 kg and aged between 6 and 12 months were divided into three groups, each group representing a different treatment. The treatments were: T₁ = livestock obtained an energy level of 65%, + CP 15%, T₂ = livestock obtained an energy level of 67%, + CP 15%, and T₃ = livestock obtained an energy level of 70%, + CP 15%.The variables measured consisted of nitrogen consumption, fecal nitrogen and urine nitrogen. The results of the study showed that the highest nitrogen consumption in the T₃ treatment was 3.2033 ± 0.1549 g/head/day, followed by the T₂ treatment of 3.0894 ± 0.0384 g/head/day, and the T₁ treatment of 2.6159 ± 0.0658 g/head/day; fecal nitrogen in the T₁ treatment was 1.5070 ± 0.3880 g/head/day, followed by the T₃ treatment of 1.1673 ± 0.2751 g/head/day, and the T₂ treatment of 1.1566 ± 0.5887 g/head/day; urinary nitrogen in the T₂ treatment was 0.7906 ± 0.1804 g/head/day, followed by the T₁ treatment of 0.7606 ± 0.0456 g/head/day and the T₃ treatment of 0.6933 ± 0.0637 g/head/day.   The results of the analysis of variance showed that the treatment had a significant effect on nitrogen consumption and had no significant effect on fecal nitrogen and urinary nitrogen. It was concluded that feeding with different energy levels could increase nitrogen intake but relatively the same fecal and urinary nitrogen excretion.

Keywords: Nitrogen Intake, Nitrogen Excretion, Kacang Goat, Energy Level