The Effects of Physically Effective Neutral Detergent Fibre Content on Growth Performance and Digestibility in Beef Cattle Fed with Total Mixed Ration
The objective of this study was to investigate the effects of physically effective neutral detergent fibre (peNDF) content on growth performance and digestibility in beef cattle fed with total mix ration (TMR). A total of 54 six-month-old male Holstein beef cattle (averaged weight of 280 kg) were divided into 3 groups each consisting of 18 cattle. Feed ingredients were added to the TMR wagon as follows; wheat straw, alfalfa hay, barley, corn, cotton seed meal, conventional beef feeding, corn silage, beet pulp, molasses and feed additives. TMR was offered daily to animals. The dietary treatments included; a) TMR diet mixed for 7 min (T1); b) TMR diet mixed for 14 min (T2), and c) free choice diet (FCD). The same ingredients feeds of TMR was given to the T1 and T2 groups but in different mixed times. Alfalfa hay and calf grower feed were separately offered animals in FCD. End of first month of trial, the daily feed intake (DFI) and dry matter intake (DMI) were significantly lower in the cattle that received FCD. At the end of the second month, the daily feed intake and dry matter intake were the highest in T1 diets among all the groups. There was no significant effect of different mixing times on n 48-h NDF digestibility (NDFD48) and ADF (ADFD48) digestibility of TMR. The lowest ration cost of 1 kg daily gain was observed for T2 and the daily feed intake cost was lower for FCD group than T1 and T2. It was concluded that mixing time had an effect on dry matter intake (DMI), average daily gain (ADG).
Toplam Karma Yemle Beslenen Besi Sığırlarında Fiziksel Etkin Nötral Deterjan Lifin Büyüme Performansına ve Sindirilebilirlik Üzerine Etkisi
Bu çalışmada toplam karma rasyon (TMR) ile beslenen besi sığırlarında fiziksel etkin nötral deterjan lifin (peNDF) büyüme performansına ve sindirilebilirlik üzerine etkisi incelenmiştir. Altı aylık yaştaki toplam 54 Holstein erkek besi sığırı (ortalama ağırlıkları 280 kg), her biri 18’er hayvandan oluşan 3 gruba ayrılmıştır. Yem bileşenleri TMR vagonuna; buğday samanı, yonca kuru otu, arpa, mısır, ayçiçeği küspesi, klasik besi yemi, mısır silajı, şeker pancarı posası ve katkı maddeleri sırası ile eklenmiştir. TMR hayvanlara günlük olarak sunulmuştur. Deneme grupları a) 7 dakika karışan TMR (T1); b) 14 dakika karışan TMR ve c) serbest seçenekli yemlemeden (SSY) oluşmuştur. T1 ve T2 grubuna verilen TMR’nin yem bileşenleri aynı iken karışma zamanları farklı olmuştur. Yonca kuru otu ve buzağı büyütme yemi SSY grubuna ayrı olarak sunulmuştur. Denemenin birinci ayı sonunda günlük yem tüketimi (GYT) ve günlük kuru madde tüketimi (GKMT) SSY grubunda önemli derecede düşük bulunmuştur. İkinci ayın sonunda günlük yem tüketimi ve kuru madde tüketimi T1 grubunda en yüksek bulunmuştur. TMR karıştırma süresinin 48 saat NDF (NDFD48) sindirimi ve 48 saat ADF (ADFD48) sindirimi üzerine etkisi olmamıştır. 1 kg canlı ağırlık artışı için rasyon maliyeti en az T2 grubunda saptanmış ve günlük yem tüketim maliyeti FCD grubunda T1 ve T2’ye göre düşük çıkmıştır. Bu çalışmada karıştırma süresinin kuru madde tüketimi, canlı ağırlık artışı üzerine etkisi olduğu sonucuna varılmıştır.
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- ISSN: 1300-6045
- Yayın Aralığı: Yılda 6 Sayı
- Başlangıç: 1995
- Yayıncı: Kafkas Üniv. Veteriner Fak.
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