CHEMICAL COMPOSITION AND IN VITRO GAS PRODUCTION KINETICS OF SOME TREE LEAVES OBTAINED IN THE MEDITERRANEAN REGION OF TURKEY

Öz

This study was carried out to determine the potential nutritive value and in vitro gas production (IVGP) kinetics of some tree leaves. In this study four different tree foliages (orchid tree -Bauhinia purpurea L. (Fabaceae), eucalyptus -Eucalyptus camaldulensis, yellow oleander tree -Thevetia peruviana and pepper tree -Schinus molle) were used. The gas production of leaves over time was recorded at 3, 6, 9, 12, 24, 48, 72 and 96 h after incubation. The results of the present study suggested that there were differences among the tree leaves in terms of feed value, IVGP and IVGP kinetics such as energy value and organic matter digestibilities (P<0.01). The leaves of yellow oleander tree had the lowest neutral detergent fiber (NDF), acid detergent fiber (ADF) and condensed tannin (CT) content (P<0.01). Also, IVGP of the leaves from yellow oleander tree was highest throughout the incubation period (P<0.01). In contrast, the lowest total gas production (96 h) was obtained from the fermentation of the leaves of orchid tree. Low fibre and condensed tannin contents of leaves of yellow oleander tree would probably increase the voluntary intake and digestibility of these leaves by small ruminants.

Anahtar Kelimeler

• Leaves
• roughage
• in vitro gas production
• energy value
• organic matter digestibility

TÜRKİYE'NİN AKDENİZ BÖLGESİNDEN ELDE EDİLEN BAZI AĞAÇ YAPRAKLARININ KİMYASAL BİLEŞİMİ VE IN VITRO GAZ ÜRETİM KİNETİKLERİ

Öz

Bu çalışma bazı ağaç yapraklarının potansiyel yem değeri ve in vitro gaz üretim (IVGÜ) kinetiklerini belirlemek amacıyla yürütülmüştür. Çalışmada dört farklı ağaç yaprağı (orkide - Bauhinia purpurea L. (Fabaceae), okaliptus -Eucalyptus camaldulensis, sarı zakkum -Thevetia peruviana ve karabiber -Schinus molle) kullanılmıştır. Yaprakların 3, 6, 9, 12, 24, 48, 72 ve 96 saatlik inkübasyonlar sonrası gaz üretimleri kayıt edilmiştir. Çalışmadan elde edilen sonuçlar ağaç yaprakları arasında yem değerleri, IVGÜ, İVGÜ kinetikleri, enerji değeri ve organik madde sindirilebilirlikleri bakımından farklılıklar göstermiştir (P<0.01). En düşük kondanse tanen (KT), nötral çözücülerde çözünmeyen lifli bileşikler (NDF) ve asit çözücülerde çözünmeyen lifli bileşikler (ADF) içerikleri sarı zakkum ağacı yaprağında bulunmuştur (P<0.01). Ayrıca, sarı zakkum ağacı yaprakları inkübasyon periyodu süresince en yüksek IVGÜ değerlerine sahip olmuştur (P<0.01). Ancak, en düşük toplam gaz üretimi (96 saat) orkide ağacı yaprakları fermentasyonundan oluşmuştur. Sarı zakkum ağacı yapraklarının düşük lif ve kondanse tanin içeriği, muhtemelen küçük baş hayvanların bu yaprakları gönüllü tüketimlerini ve sindirilebilirliğini artıracağı düşünülmektedir.

Anahtar Kelimeler

• Yapraklar
• kaba yem
• in vitro gaz üretimi
• enerji değeri
• organik madde sindirilebilirliği

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