饲料营养
韩勇 (王德凤 ),韩勇 (王德凤 ),夏先林,王德凤,赵
动物营养学报.
0, ():
329-336.
The objective of this study was to evaluate the effects of probiotics, palm oil by-pass fat (POBF), and probiotics+POBF on growing goats that were fed corn silage during dry season. Twenty-seven growing crossbred (Thai native×Anglo-Nubian) goats weighing (13.4±1.3) kg, aged about 5 months, were selected and allocated to 9 groups according to a factorial in a Completely randomized design (CRD). The three levels of POBF were 0, 20, and 40 g/(goat·d), and those of probiotics were 0, 2.5, and
5.0 g/(goat·d). The results showed that dry matter intake (DMI) decreased with the increasing level of POBF (P<0.05), but increased with probiotics (P<0.05), and were not affected by the probiotics+20 g/(goat·d) POBF treatments. Average daily gain (ADG) significantly increased with probiotics and probiotics+POBF (P<0.05). Dry matter (DM) and organic matter (OM) digestibility was increased with probiotics with highly significance (P<0.01), while was increased significantly with the combination of probiotics+POBF (P<0.05). There was a significant interaction between POBF and probiotics on DM and OM digestibility. However, crude protein (CP) digestibility was not affected (P>0.05) by them; and neutral detergent fiber (NDF) digestibility decreased with the increasing level of POBF, but increased with the increasing level of probiotics. Total ruminal volatile fatty acids (VFAs) (P<0.01) and the proportion of propionic and butyric acid significantly (P<0.05) increased with probiotics, POBF, and probiotics+POBF, but the proportion of acetic acid showed a decreased tendency. There was an overall improvement in the performance of the goats fed a combination supplement of POBF and probiotics compared with the control diet. For the DMI and ADG, the 2.5 g/(goat·d) probiotics +20 g/(goat·d) POBF treatment got optimal results. If probiotics and POBF is focused on, 2.5 g/(goat·d) and 20g/(goat·d) supplementation achieved better results.