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Effects of Cassava Leaf Meal on the Rumen Environment of Local Yellow Cattle Fed Urea-Treated Paddy Straw

  • Khang, D.N. (Department of Animal Physiology and Chemistry, Faculty of Animal Husbandry and Veterinary Medicine College of Agriculture and Forestry, National University of Ho Chi Minh City) ;
  • Wiktorsson, H. (Department of Animal Physiology and Chemistry, Faculty of Animal Husbandry and Veterinary Medicine College of Agriculture and Forestry, National University of Ho Chi Minh City)
  • Received : 1999.06.02
  • Accepted : 2000.01.05
  • Published : 2000.08.01

Abstract

An experiment was conducted as a Latin square design with four rumen fistulated local yellow cattle with a mean live weight of 230 kg. The treatments were: $(CLM_0)$ urea-treated rice straw ad libitum plus 1 kg cassava root meal (basal diet), $(CLM_{500})$ basal diet plus 500 g cassava leaf meal, $(CLM_{1000})$ basal diet plus 1,000 g cassava leaf meal, and $(CLM_{1500})$ basal diet plus 1,500 g cassava leaf meal. The results showed that there were differences in dry matter intake of urea-treated rice straw between treatments (p<0.05). The highest total dry matter intake was observed for treatment $CLM_{1500}$, with 2.62 kg DM/100 kg LWt/day, followed by treatments $CLM_{1000}$, $CLM_{500}$ and $CLM_0$, with 2.42, 2.00 and 1.86 kg DM/100 kg LWt/day, respectively. The ruminal ammonia concentration on treatment $CLM_{1500}$ was greater than on treatments $CLM_{1000}$, $CLM_{500}$ and $CLM_0$. There were non-significant differences in the ruminal pH among the treatments. The in sacco degradability of cassava leaf meal and cassava root meal was high, and on average 75 and 85% respectively of the DM had disappeared after 24 h of incubation. Degradation rate of urea treated rice straw was 64% after 72 h of incubation.

Keywords

Cattle;Cassava Leaf Supplement;Rice Straw;Dry Matter Intake;Rumen Environment;Feed Degradation