Evaluasi pemberian daun katuk(Sauropus androgynus) dalam ransum terhadap kadar kolesterol kuning telur dan karkas ayam petelur

Abstract

Katuk leaves (Sauropus androgynus) has been using for many years as a medicinal plant and has a capability to increase milk secretion. Farmers have been using katuk leaves as feed supplement for dairy cattles as to increase milk production. So far, there is no report as to whether katuk leaves have been used in laying hens diet. It is estimated that katuk leaves have physiological effects in the body to prevent the synthesis of bile acid secretion and therefore would decrease the production of cholesterol. The objective of this research is to study the effect of katuk leaves addition in the diet on the level of cholesterol in the egg yolk and carcass of laying hens. Seventy two laying hens at the age of 32 weeks, were divided into 4 treatment groups with 3 replications and 6 laying hens each replications. The laying hens were raised for 24 weeks. The treatments were Control (diet without katuk leaves), T1 (diet with 5% katuk leaves), T2 (diet with 10% katuk leaves), and T3 (diet with 15% katuk leaves). This research was carried out from May 2002 until September 2002 in the Center for Life Sciences Study, Bogor Agricultural University. The experimental design was Completely Randomized Design. The data was analyzed using Analysis of Variance (ANOVA). and continued with Contrast Orthogonal Test if the treatment were significantly different. It was concluded that katuk leaves could decrease the level of cholesterol in the egg yolk and carcass cholesterol in laying hens. The addition of katuk leaves decreased egg yolk cholesterol significantly as compared to that of the Control. The addition of katuk leaves in the diet also decreased the level of cholesterol in the carcass, except the carcass from T3 group. The feed consumption of the Control, T1 and T2 groups were higher than those fed the T3 diet. The same pattern occurred for the egg production. The best feed conversion were from the groups fed the T3 and the control diet.