Kulit ubi kayu adalah limbah pertanian yang cukup besar potensinya sebagai bahan pakan. Penelitian ini bertujun untuk mengetahui pengaruh lama fermentasi terhadap kualitas fraksi serat kulit ubi kayu yang difermentasi. Penelitian ini dilaksanakan pada bulan September sampai Oktober 2016 di Laboratorium Nutrisi dan Kimia Fakultas Pertanian dan Peternakan Universitas Sultan Syarif Kasim Riau. Penelitian ini dilakukan menggunakan penelitian yang Rancangan Acak Lengkap (RAL) yang terdiri dari 4 perlakuan dengan 5 ulangan. Perlakuan pada penelitian ini adalah lama fermentasi A = 0 hari, B = 3 hari, C = 6 hari dan D = 9 hari. Parameter yang diamati berupa fraksi serat yaitu kandungan NDF, ADF, ADL, hemiselulosa dan selulosa. Hasil penelitian menunjukkan bahwa lama fermentasi berpengaruh nyata (P<0,05) terhadap kandungan ADF dan tidak berpengaruh (P>0,05) terhadap kandungan NDF, ADL, hemiselulosa dan selulosa. Disimpulkan bahwa lama fermentasi yang berbeda memberikan pengaruh terhadap kandungan ADF, namun belum berpengaruh terhadap kandungan NDF, ADL, hemiselulosa dan selulosa. Lama fermentasi yang berbeda tidak mampu meningkatkan kandungan hemiselulosa dan selulosa, serta tidak mampu menurunkan kandungan NDF, ADF, dan ADL fermentasi kulit ubi kayu.
Cobalt (Co) is required by rumen microorganism for vitamin B12 synthesis. Vitamin B12 is an important cofactor for methionine synthesis and gluconeogenesis. In young ruminants up to 6–8 wk old, the rumen has not been completely developed and rumen microorganisms are not ready to supply vitamin B12. The aim of this research was to determine the potency of mixed rumen bacteria and dietary supplementation of Co and its effect on plasma glucose, blood minerals (Co, Fe, and Zn) concentrations, and hematology of pre-weaning twin lambs. Twelve one month-old local twin lambs were assigned to 4 groups in a randomized complete block design. Lambs were fed cow milk at 10% body weight, adjusted weekly for 80 d. Mixed rumen bacteria were offered at 15 mL/d (8.295x1010 cfu). Dietary treatments were: 1) basal diet (Control), 2) basal diet + 1 mg/kg DM cyanocobalamin (VitB12) and 3) basal diet + 1 mg/kg DM of Co + administration of 15 mL mixed rumen bacteria (CoBac). There were no treatment effects on neither plasma glucose and blood mineral concentrations nor hematological profiles. This study demonstrated that pre-weaning twin lambs are not responsive to supplementation of Co and administration of mixed rumen bacteria
L-citrulline (L-Cit) is considered one of the potential amino acids that are able to reduce body temperature in layer chicks. However, there are no reports on functions of L-Cit in KUB chicks. Therefore, the present study aimed to evaluate the effects of oral administration of L-Cit on feed intake, body temperature and plasma biochemical parameters of KUB chicks over two hours post-administration. Neonatal KUB chicks were orally administered with different doses of L-Cit (0, 3.75, 7.5 and 15 mmol/kg body weight). At 30, 60 and 120 min, feed intake was determined, also rectal temperature of chicks was measured by using a digital thermometer. At 120 min after administration, the blood samples were immediately collected through the jugular vein, then biochemical parameters of plasma (total cholesterol, triacylglycerol and total glucose) were analyzed. The obtained results indicated that feed intake, body temperature, and plasma metabolites were not significantly influenced by different doses of L-Cit. In conclusion, L-Cit could not able to improve feed intake, decrease body temperature and change plasma metabolites in KUB chicks.
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