Determination of potential nutritive value of exotic tree leaves in Turkey

Bu çalışmanın amacı, bazı egzotik ağaç yapraklarının potansiyel besleme değerlerini kimyasal kompozisyon ve in vitro gaz üretim tekniği kullanarak belirlemektir. Egzotik ağaç yapraklarının in vitro gaz ölçümleri fermantasyonun 3, 6, 12, 24, 48, 72 ve 96’ıncı saatlerinde yapılmıştır. Gaz üretimine ait parametreler y=A(1-exp-ct) fonksiyonu ile belirlenmiştir. Egzotik ağaç yaprakların kimyasal kompozisyonu, in vitro gaz üretimi, metabolik enerji (ME) içeriği, organik madde sindirim derecesi (OMSD) üzerine önemli etkisinin olduğu saptanmıştır. Egzotik ağaç yaprakların protein içeriği %14.16 ile 21.92 arasında değişmiştir. Top akasya (Robinia pseudoecacia umbraculifera) yaprağının protein içeriği ise diğer ağaçların yapraklarının protein içeriğinden daha yüksek bulunmuştur. Egzotik ağaç yapraklarının NDF ve ADF içerikleri sırasıyla %30.42 ile 41.55 ve 27.81 ile 28.06 arasında değişmiştir. Gladiçya ağaç yaprağının NDF içeriği diğer ağaç yapraklarının NDF içeriğinden daha yüksek saptanmıştır. Gülibrişim (Albizia julibrissin) ağaç yaprağının gaz üretim hızı, gladiçya (Gladitsia triacanthos) ve top akasya (Robinia pseudoecacia umbraculifera) ağacı yaprağından önemli derecede daha yüksek bulunmasına rağmen, potansiyel gaz üretim miktarı yalnızca gladiçya ve adi akasya yaprağından daha yüksek bulunmuştur. Metabolik enerji (ME) ve organik madde sindirim derecesi (OMS) sırasıyla 9.49 ile 10.36 MJ/kg KM ve %64.42 ile 70.3 arasında değişmiştir (P

Anahtar Kelimeler:

Türkiye, kimyasal bileşim, ham protein, sindirilebilirlik, evcil hayvanlar, gaz üretimi, kinetik, yapraklar, baklagiller, çiftlik hayvanları, büyükbaş hayvan beslenmesi, metabolize olabilir enerji, azot, besin değeri, organik madde, polietilen glikol, kaba yem, tanen

Türkiye’deki bazı egzotik ağaç yapraklarının potansiyel besleme değerinin belirlenmesi

The aim of this study was to determine the effects of plant species on the potential nutritive value of introduced tree leaves using the chemical composition and in vitro gas production. Gas productions of the introduced tree leaves were determined at 3, 6, 12, 24, 48, 72 and 96 h incubation times and their gas production kinetics were described using the equation y=A (1-exp-ct). Plant species had a significant effect on the chemical composition, in vitro gas production, metabolisable energy (ME) and organic matter digestibility (OMD) of the introduced tree leaves. The crude protein content of leaves ranged from 14.16 to 21.92%. The crude protein content of leaves from Robinia poseudoecacia umbraculifera was significantly (P<0.001) higher than those of other legume trees. The NDF and ADF content of legume trees ranged from 30.42 to 41.55 and 27.81 to 28.06% respectively. NDF content of leaves from Gladitsia triacanthos was significantly (P<0.05) higher than those of other legume trees. Although the gas production rate (c) of leaves Albiza julibrissin was significantly (P<0.05) higher than those of Gladitsia triacanthos and Robinia poseudoecacia umbraculifera. The potential gas production of Albiza julibrissin was significantly higher than those for Gladitsia triacanthos and Robinia poseudoecacia. The ME and OMD contents of introduced tree leaves ranged from 9.49 to 10.36 MJ/kg DM and from 64.42 to 70.3% respectively. In conclusion, the species had a significant effect on the potential nutritive value of introduced legume tree leaves. However the tree leaves studied in the current study would be effective protein resource for ruminant animals and may correct the deficient nitrogen in basal roughages with low protein during critical period of year when feed shortage occurred. However leaves obtained from Robinia pseudoecacia umbraculifera, Gladitsia triacanthos, and Robinia psedoecacia should be supplemented with polyethylene glycol or treated with alkali to reduce the detrimental effect of condensed tannin. Condensed tannin (CT) contents of legume trees ranged from 1.70 to 18.35%.

Keywords:

Turkey, chemical composition, crude protein, digestibility, domestic animals, gas production, kinetics, leaves, legumes, livestock, livestock feeding, metabolizable energy, nitrogen, nutritive value, organic matter, polyethylene glycol, roughage, tannins,

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