Inclusion of kapok seed oil in the diet for growing of thin-tailed sheep to reduce cholesterol and to improve omega-six fatty acid contents of lamb

Abstract

This research was conducted to study the influence of protected kapok seed oil (PKSO) supplementation in its combination with concentrate, in this case was rice bran (RB) on lipid content of thin tailed sheep received field grass as basal feed. A number of 24 heads of male thin-tailed sheep were used as experimental material. These sheep were divided into 8 treatment groups. There were two treatment factors, i.e. : PKSO supplementation (S) as factor I and RB supplementation (K) as factor II. Factor I consisted of 2 levels, i.e. 0% (S0) and 10% (S1), whereas factor II consist of 4 levels, i.e. 0% (K0), 15% (K1), 30% (K2) and 45% (K3), respectively, based on dry matter (DM) intake. Several variables were measured, namely content of intra muscular fat (IMF), iodine number of muscular fatty acid, content of meat cholesterol and omega 6 fatty acid (in this case linoleic acid). The collected data were statistically analyzed by analysis of variance with factorial treatment pattern (2 x 4) in completely randomized design (CRD). Content of IMF in sheep supplemented with 0 and 15% KSO levels was not significantly different from those without kapok seed oil (KSO) supplementation at the same level of RB feeding (3.45 and 3.99% vs 3.01 and 3.75%). Supplementation of protected KSO in combination with 30 and 45% RP resulted in significantly increased (P < 0.05) IMF content (4.75 and 5.93% vs 4.32 and 5.40%) and significantly decreased (P < 0.05) meat chollesterol content (62.46 and 65.26 mg/100 g vs 89.21 and 72.63 mg/100 g) also significantly increased (P < 0.05) linoleic acid proportion (15.52 and 18.25% vs 3.68 and 4.04%) and iodine number (12.52 and 10.25 vs 4.09 and 4.98).