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Farklı Azot Dozları ile Gübrelenen Meradan Elde Edilen Otların Organik Madde ve Ham Proteinlerinin In situ Rumen Parçalanabilirliği

In Situ Rumen Degradability of Organic Matter and Crude Protein of Forages from Fertilized Pasture with Different Nitrogen Doses

Journal Name:

Publication Year:

DOI: 
http://dx.doi.org/10.13002/jafag953
Abstract (2. Language): 
This study was conducted to determine organic matter (OM), crude protein (CP) contents, in situ rumen degradability and degradability characteristics of pasture forage be composed approximately 85 % legume and 15 % grass ratio, with fertilized different nitrogen (N) doses (0, 5, 10, 15, 20 and 25 kg ammonium nitrate da-1). In this study, three rumen fistulated Holstein Friesian heifers were used. It was determined that increasing N doses increased organic matter (OM), hemicelluloses rate (P<0.01) of legume- grass forage and crude protein of grass (P<0.05). It was determined that there was a linear (P<0.01, R2=0.39) and quadratic (P<0.01, R2=0.52) very important relationship between OM degradability of rangeland forage and nitrogen doses. Besides, It was found that there was a linear positive relationship (P<0.05, R2=0.27) between out flown rate (k=0.02 h-1) of CP and effective rumen degradability of CP with the nitrogen doses. The results of this study indicated that organic matter and hemicellulose content of pasture forage with crude protein content of grass increased, depending on nitrogen application levels.
Abstract (Original Language): 
Bu çalışma, yaklaşık % 85 baklagil ve % 15 buğdaygil yem bitkilerinden oluşan bir mera farklı dozlarda azotlu gübre (0, 5, 10, 15, 20 ve 25 kg amonyum nitrat da-1) ile gübrelenmiş ve elde edilen otların organik madde (OM) ve ham protein (HP) içeriği ile bu besin maddelerinin in situ rumen parçalanabilirliği ve parçalanabilirlik özelliklerini belirlemek amacıyla yürütülmüştür. Çalışmada rumen kanüllü 3 baş Siyah Alaca ırkı düve kullanılmıştır. Azot dozundaki artışın mera otlarının organik madde ve hemiselüloz oranını (P<0.01), buğdaygil bitkilerinin ise ham protein oranını (P<0.05) artırdığı belirlenmiştir. Mera otların organik maddesinin sindirilebilirliği ile azot dozları arasında doğrusal (P<0.01, R2=0.39) ve quadratik (P<0.01, R2=0.52) bir ilişki olduğu tespit edilmiştir. Ayrıca ham proteinin rumenden geçiş hızı (k=0.02 s-1) ve etkin ham protein parçalanabilirliği ile meraya uygulanan azot dozları arasında da önemli bir ilişki olduğu (P<0.05, R2=0.27) bulunmuştur. Bu çalışmanın sonucu, meraya uygulanan azot seviyesine bağlı olarak mera otlarının organik madde, hemiselüloz içeriği ile buğdaygil bitkilerinin ham protein içeriğini artırdığını göstermiştir.
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