SOYXYL supplementation as a source of high-quality protected protein in
rumen (Rumen Protected Protein) has proven to improve reproduction performance of
bulls. The SOYXYL is an extrusion product of soybean (Glycine max) as a source of
rumen protected protein. The potential of the protein supplementation is maximally
expressed when it is supported by sufficient of metabolic rate. In this case the choline
chloride supplementation increases the metabolic rate. The aim of the research was to
analyze the effect of choline chloride supplementation on reproduction performance and
hematologic status related to reproduction performance of bulls fed protected protein in
the ration. The materials used were 12 bulls aged 5 years having weight of 700 ± 2.75
kg that were divided into 4 treatment groups, each of which consisted of 3 heads. The
treatments applied were T0 (control): ration (grass + commercial concentrate) +
protected protein supplement “SOYXYL”; T1: control + choline chloride 0.145% dry
matter (DM) concentrate/head/day; T2: control + choline chloride 0.290% DM
concentrate/head/day; T3: control + choline chloride 0.435% DM concentrate/head/day.
Variables measured were nutrient consumption, blood lipid status, blood protein status,
and reproduction performance. Data were analyzed using ANOVA in a completely
randomized design and statistically processed using SAS program. The result showed
that choline chloride supplementation by 0.435% from DM concentrate increased
(p