Kafkas Üniversitesi Veteriner Fakültesi Dergisi Articles in Press
Effects of High Rice Diet on Growth Performance, Nutrients Apparent Digestibility, Nitrogen Metabolism, Blood Parameters and Rumen Digestibility, Nitrogen Metabolism, Blood Parameters and Rumen
Kaijun WANG1,2, Mengli ZHENG1,2, Ao REN1,2, Chuanshe ZHOU2, Qiongxian YAN2, Zhiliang TAN2, Peihua ZHANG1, Kangle YI
1Hunan Provincial Key Laboratory for Genetic Improvement of Domestic Animal, College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, P. R. CHINA
2CASKey Laboratory of Agro-Ecological Processes in Subtropical Region, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha, Hunan 410125, P. R. CHINA
3Forage Grass and Herbivore Animal Department, Hunan Institute of Animal and Veterinary Science, Changsha, Hunan 410131, P. R. CHINA
DOI : 10.9775/kvfd.2019.21721 This study was conducted to evaluate the effects of high rice grain diet on apparent nutrient digestibility, growth performance, nitrogen digestion, blood parameters and rumen fermentation in goats. Sixteen growing goats were divided into 2 groups and fed a normalconcentrate diet (NC, 55% concentrate of dry matter; n=8) or a high concentrate diet (HC, 90% concentrate of dry matter; n=8) for 5 wk. Growth performance, nutrients digestibility, nitrogen digestion, blood parameters and ruminal fermentation were measured. Total weight gain and average daily gain increased in the HC group (P<0.01). Digestibility of Neutral Detergent Fibre (NDF) and Acid Detergent Fibre (ADF), nitrogen intake and digested nitrogen also increased (P<0.05) by HC feeding. Triglycerides, cholesterol, high density lipoprotein and low-density lipoprotein concentrations in the blood decreased (P<0.05). HC diet feeding decreased (P<0.01) the pH value, acetate level and ratio of acetate to propionate, but increased (P<0.05) the concentrations of propionate, valerate and total volatile fatty acids in the rumen. These findings revealed that the HC diet could promote the growth of growing goats, change the ruminal fermentation pattern and lipid metabolism in the blood, but cause subacute ruminal acidosis, which might increase the risk of body health. Keywords : High concentrate diet, Goats, Apparent digestibility, Metabolism, Fermentation