Research Information System
Thesis Type: Doctorate
Institution Of The Thesis: Uludağ Üniversitesi, Turkey
Approval Date: 2019
Thesis Language: Turkish
Student: MUKADDES MERVE EFİL
Supervisor: HIDIR GENÇOĞLU
Abstract:The purpose of this study is to evaluate effects of amylase supplementation to calf starter feeds with different starch levels on feed intake, body weight gain, feed conversion rate, body sizes, clinic and respiratory score and fecal score, blood beta hydroxy butyric acid (BHBA), insulin, growth hormone, NEFA and glucose levels and, rumen parameters in calves. The research was carried out in calf unit in İtimat Agriculture and Animal Husbandry in Yenişehir-Bursa. Therefore, 6 groups were formed and 90 Holstein-Friesian female calves were used totally as 15 calves in each group. Starter feed containing 23%, 28% and 33% starch in 88% dry matter and same feeds with amylase enzyme (RumiStar, DSM Animal Nutrition & Health Turkey) added at a dose of 1 kg / ton were given to groups, respectively. The groups were named as 23E-, 23E +, 28E-, 28E +, 33E- and 33E + according to the starch content of the calf starter feeds and whether or not the enzyme is contained. Body weights of the calves measured at 0nd, 28th, and 56th days; calf starter consumption and feed conversion were calculated weekly. On 56th day, approximately 10 ml of blood sample was taken; insülin, growth hormone, NEFA, BHBA and glucose values were measured. pH measurement was made and volatile fatty acids profile and NH3-N were measured in rumen fluid taken on 56th day. Starting from 0nd day, clinic, respiratory and fecal score and wither height, heart width and body length were measured. Statistical analysis of datas was performed with SPSS package program. The mean starter feed consumption until 56th day was 12,2 kg and there was no difference (P>0,05) between groups. No difference (P>0,05) was found among groups for daily body weight gain, feed conversion rate and blood BHBA, NEFA, insulin and growth hormon values and clinic, respiratory and fecal score and wither height, heart width and body length. However, the fecal score taken at 8th week in 23 E(+) group was statistically different from groups 28E(-) and 28 E(+) (P<0,05). The pH value of 23E + feds was higher than 33E + feds (P<0,05). Then, 23E- feds had the lowest blood glucose levels (72,9 mg / dL) and were found different (P<0,05) from 23E +, 28E- and 33E + feds. That is concluded; the 23E + feds have higher rumen pH, which may contributes to health and performance.