İSMAİL KAYA, Yücel ÜNAL, DİLEK AKSU ELMALI

Effects of different additives on the quality of grass silage and rumen degradability and rumen parameters of the grass silage in rams

Bu çalışma, çayır otunun farklı katkı maddeleriyle silolanmasının kuru madde (KM), besin madde içerikleri, pH ve rumende yıkılabilirlik ile yalnız ot silajının koçlarda sindirilebilirlik ve rumen parametrelerine etkisini incelemek amacıyla yapılmıştır. Araştırmada katkısız çayıır otu, çayır otu + %2.5 arpa karışımı, çayır otu + %5 arpa karışımı, çayır otu + %2.5 arpa + %1 melas + %0.5 tuz karışımı ve çayır otu + %5 arpa + %2 melas + %1 tuz karışımından oluşan üç tekerrürlü 15 adet silaj yapıldı. Ayrıca plastik varillere yalnız çayır otu silajı yapılarak, besin madde sindirilebilirliği ile rumen pH, amonyak azotu ve uçucu yağ asitlerine olan etkileri üç baş koç üzerinde belirlenmiştir. Ham protein (HP) oranı arpa, melas ve tuz karışımlı silajlarda en yüksek değerde (%10.41, 10.86) bulunurken, en yüksek azotsuz öz madde (NÖM) içeriği ise arpa karışımlı silajlarda (%44.41, 47.17) tespit edilmiştir. Silajların pH değeri, katkı maddelerinin çeşit ve miktarına göre azalmıştır. Rumende değişik saatlerde inkubasyona bırakılan çayır otu ve katkılarla hazırlanan ot silajlarının KM ve besin madde yıkılabilirlikleri, silaj türü ve inkübasyon süresine göre önemli farklılık göstermiştir (P

Anahtar Kelimeler:

rumen sindirimi, yem katkı maddeleri, ot silajı, besin maddesi içeriği, pH, koç, yıkılma

Farklı katkıların çayır otu silajının kalitesi ve rumen yıkılabilirliği ile ot silajının koçlarda rumen parametrelerine etkileri

This study was carried out to determine the effects of ensiling grass with different silages additives on dry matter (DM), nutrient content, pH and rumen degradability and the effects of grass silage on the digestibility and rumen parameters in the rams. Fifteen silages were ensiled as grass (with no additives), grass + 2.5% barley mixture, grass + 5% barley mixture, grass + 2.5% barley + 1% molasses + 0.5% salt mixture and grass + 5% barley + 2% molasses + 1% salt mixture with three replicates. Additionally grass with no additives was ensiled in the plastic barrels to determine the effects of this silage on the digestibility, rumen pH, ammonia nitrogen and volatile fatty acids by using three rams. The highest crude protein (CP) contents were determined in the barley, molasses and salt mixture of grass silages (10.41, 10.86%) and the highest nitrogen free extract (NFE) contents were determined in the barley mixture grass silages (44.41, 47.17%). The pH value of silages was decreased according to the amount and type of silage additives. DM and nutrient degradabilities of grass silages with or without additives left rumen incubation at different hours were found statistically different with aspect to hours and types of silage. (P<0.05). CP and DM digestibilities of grass silage in the rams were determined as 64.49 and 53.21%. Total volatile fatty acids were determined as 69.73 mmol/L. Grass silage, mixtured with barley, molasses and salt were determined the best silage with respect to the nutrient content and pH.

Keywords:

rumen digestion, feed additives, grass silage, nutrient content, pH, rams, degradation,

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