Nitrogen balance, urea concentrations and microbial protein synthesis in goats fed diets containing sugar cane treated with calcium oxide

作者：Pinto de Carvalho Gleidson Giordano; Garcia Rasmo; Vieira Pires Aureliano Jose; Silva Roberio Rodrigues; Albuquerque Pereira Mara Lucia; Viana Pablo Teixeira; dos Santos Alana Batista; de Jesus Pereira Taiala Cristina

来源：Brazilian Journal of Animal Science, 2010, 39(10): 2253-2261.

DOI：10.1590/S1516-35982010001000022

• microbial efficiency
• purine derivatives
• rumination
• whitewash

The objective of this work was to evaluate the effect of sugar cane hydrolysis with calcium oxide (CaO) on nitrogen balance, concetrations of urea in the urine and in the plasma and synthesis in microbial protein in goats. Eight castrated male Saanen breed goats, with 22.6 kg average body weight and at four months of age were used distributed in two 4 x 4 Latin squares, during four 14-day experimental periods. The rations which were formulated to be isoprotein, with 14% crude protein (CP) were composed of 70% sugar cane (treated with 0; 0.75; 1.5 or 2.25% of calcium oxide in natural matter basis and corrected with 1% urea) and 30% of concentrate given ad libitum to animals. Sugar cane with calcium oxide was chopped in a stationary chopper, weighted and stored in 50-L plastic buckets and treated with calcium oxide to be given to the animals after 24 hours of storage. Nitrogen balance, urine and plasma urea concentrations and urine urea excretion were not affected by sugar cane + calcium oxide treatment. Concetration of allantoin (% total purine) was higher and the uric acid concentration was lower in diets with sugar cane hidrolised with calcium oxide in relation to in natura sugar cane. The microbial production and efficiency are not affected by addition of calcium oxide to sugar cane in diets for growing goats.

• 出版日期2010-10