Livestock Studies
1998, Vol 38, Num, 2 (Pages: 041-047)
The Effects of Sunflower Seed Meal and Urea Upon Microbial Protein Synthesis in the Rumen of Angora Goats
Nurcan ÇETİNKAYA 1 ,Hüseyin ÖZCAN 1 ,Serap ULUTÜRK 1 ,Tayfur BAKİOĞLU 1
1 TAEK, Lalahan Hayvan Sağlığı Nükleer Araşt. Enstitüsü, 06852-Lalahan / ANKARA
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The effects of protein and non-protein nitrogen sources (sunflower seed
meal and urea) upon microbial protein synthesis in the rumen of Angora goats
were investigated. Three Angora goats of 40-45 kg live weight and approximately
5 year-old fitted with ruminal and abomasal (T -type) cannulas were housed in an
individual pens. The animals were randomaly allocated to the treatments according
to 3 x 3 latin square desing and fed with control diet consisted of barley and
grass hay (A) (15.45 MJ ME/d. head, 13.50 g RDN/d. head), control diet supplemented
with urea (B) (15.45 MJ ME/d. head, 20.4 g RDN/d. head) and sunflower
seed cake (15.45 MJ ME/d. head, 20.4 g RDN/d. head) (C). Diets were given by
authomatic feeders. At each period 200 μCi / d Na2 35S04 was infused with infusion
pump. 35S labelled cysteine and methionine were isolated from collected
abomasal samples and activity of 35S labelled amino acids were counted. Specific
activity of total non-ammonia nitrogen (NAN) was analysed in total abomasal
samples. Daily flow rate of OM and NAN from rumen to abomasum were determined
by using solide (Cr2 O3) and liquid phase flow markers (PEG).
The estimated efficiency of microbial protein synthesis in the rumen for
diets A, B and C were 23, 33 and 30 g MN (mikrobial azot)/kg ADOM (Apparently
Digestible Organic Matter) respectively. İn conclusion, supplementation of control
diet with sunflower seed cake and urea /NPN) were positively affected the microbial
protein synthesis in the rumen of Angora goats. The effects of protein and
non-protein nitrogen sources on microbial protein synthesis were similar.
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