Hasat zamanının Katran yoncasının (Bituminaria bituminosa) besin madde kompozisyonu, in vitro gaz ve metan üretimi üzerindeki etkisi

Yıl 2019, Cilt: 34 Sayı: 1, 102 - 106, 20.02.2019

Adem Kamalak , Kevser Durmaz

https://doi.org/10.7161/omuanajas.440508

Öz

Bu çalışmanın
amacı, katran yoncası otunun besin madde kompozisyonu, gaz üretimi, metan
üretimi, organik madde sindirim derecesi (OMSD) ve metabolik enerjisi (ME)
üzerine hasat zamanının etkisini belirlemektir. 
Üç farklı dönemde hasat edilen katran yoncasının kompozisyonu
belirlendikten sonra in vitro gaz
üretim testine tabi tutulmuştur. Katran yoncasının yirmi dört saatlik gaz
üretim değerleri kullanılarak ME ve OMSD belirlenmiştir.  Katran yoncası otunun kuru madde (KM), nötral
deterjan lif (NDF) ve asit deterjan lif (ADF) içerikleri hasat zamanının ilerlemesiyle
birlikte artmasına rağmen ham kül (HK), ham protein (HP) içerikleri ve nispi
yem değerinde (NYD) önemli azalmalar meydana gelmiştir. Katran yoncası otunun
KM, NDF, ADF ve kondense tanin (KT) içerikleri ve NYD’leri farklı hasat
devrelerinde   % 20.1 ile 33.9, % 45.0
ile 66.1, % 25.8 ile 42.5, 0.96 ile 1.25 ve 78.3 ile 141.85 arasında
değişmiştir. Hasat zamanının ilerlemesiyle birlikte katran yoncası otunun in vitro gaz ve metan üretimi (ml), ME
ve OMSD değerleri sırasıyla 41.8 ile 50.4 ml, 6.95 ile 7.70 ml, 9.28 ile 11.0
MJ kg^-1 KM ve % 63.6 ile 76.5 arasında değişmiştir. Hasat zamanının
ilerlemesiyle birlikte kaçınılmaz kayıplar olmasına rağmen katran yoncasının
tohum bağlama döneminde bile ruminant hayvanların besin maddeleri ihtiyacınının
karşılanması amacıyla rasyonlarda kullanılabileceği ileri sürülebilmekle
birlikte bu konuda daha detaylı çalışmalara ihtiyaç bulunmaktadır.  

Anahtar Kelimeler

Besleme değeri, hasat zamanı, gaz üretimi, katran yoncası, kimyasal kompozisyon, Metan üretimi

Effect of harvest stage on the chemical composition, in vitro gas and methane production of Bituminaria bituminosa

Öz

The aim of the current experiment was to determine the
effect of harvest stage on the chemical composition, in vitro gas and methane production, organic matter digestibility
and metabolisable energy of Bituminaria
bituminosa. After determination of chemical composition, Bituminaria bituminosa hay was subjected
to the test of  in vitro gas production. The metabolisable energy and organic
matter digestibility of Bituminaria
bituminosa hay were determined using the gas production at 24 h incubation.
Harvest stage had a significant effect on the chemical composition of Bituminaria bituminosa hay.  Dry matter, neutral detergent fiber and acid
detergent fiber contents of Bituminaria
bituminosa hay increased while crude ash, crude protein contents and
relative feed value decreased with advancing maturity. Dry matter, neutral
detergent fiber, acid detergent fiber, condensed tannin and relative feed value
of Bituminaria bituminosa hay ranged
from 20.1 to 33.9 %, 45.0 to 66.1 %, 25.8 to 42.5 %, 0.96 to 1.25 % and 78.3 to
141.85 respectively. On the other hand, crude ash and crude protein of Bituminaria bituminosa hay ranged from
7.96 to 9.51 and 14.2 to 23.6% respectively. 
In vitro gas production,
methane production (as ml), metabolizable energy and organic matter
digestibility of Bituminaria bituminosa
hay ranged from 41.8 to 50.4 ml, 6.95 to7.70 ml, 9.28 to 11.0 MJ kg^-1
DM and 63.6 to76.5 % respectively and decreased with increasing maturity
whereas the percentage of methane increased with increasing maturity. Although
the inevitable loss in nutritive value of Bituminaria
bituminosa plant with advancing maturity, even at the seeding stage, Bituminaria bituminosa plant could
provide hay of acceptable quality for ruminant animals to meet their
requirements.  In addition, low level of
condensed tannin in Bituminaria
bituminosa offers an opportunity to decrease the risk of bloat for grazing
ruminant animals. But this needs verification with further testing.

Anahtar Kelimeler

Nutrient composition, Nutritive value, Gas production, Harvesting stage, Methane production

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