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Asian-Australas J Anim Sci > Volume 24(8); 2011 > Article
Swine Nutrition and Feed Technology
Asian-Australasian Journal of Animal Sciences 2011;24(8): 1157-1163.
DOI: https://doi.org/10.5713/ajas.2011.10451    Published online June 22, 2011.
Inclusion of Ensiled Cassava KM94 Leaves in Diets for Growing Pigs in Vietnam Reduces Growth Rate but Increases Profitability
Nguyen T. H. Ly, Le D. Ngoan, Martin W. A. Verstegen, Wouter H. Hendriks
Abstract
This study was conducted to determine the effect of the inclusion of different levels of ensiled cassava leaves (variety KM94) in the diets on performance and carcass characteristics of growing pigs in Vietnam. A total of 40 crossbreds pigs (Large White Mong Cai, 20 males and 20 females) with an initial live weight of 23.5 kg (SD = 0.86) were randomly allocated to one of the four pens across 5 units. Four experimental diets were formulated for two growth periods, period 1 (60 days) for 20 to 50 kg and period 2 lasted 30 days, from 50 kg until slaughter. Four diets were formulated containing inclusion levels of ensiled cassava KM94 leaves diet of 0, 10, 15 and 20% in the DM. Diets were formulated based on previously determined ileal amino acid digestibility values of the KM94 products and were isonitrogenous and isocaloric on a metabolizable energy basis. Each pen of pigs was randomly assigned to one of the four dietary treatments. Dry matter intake and final weight tended to decreased with increasing levels of ensiled cassava KM94 leaves in the diet while there was a significant (p = 0.022) decrease in average daily gain. Protein depositions of the F1 pigs tended (p = 0.093) to decrease with increasing inclusion levels of ensiled cassava KM94 leaves. There was no significant difference in feed conversion ratio, carcass quality and fat gain between the groups of pigs. There were clear differences in feed costs among the experimental diets (p = 0.001) with increasing levels of ensiled cassava KM 94 leaves in the diet reducing feed costs. It was concluded that, in diets for growing pig, inclusion of ensiled cassava leaves reduces growth rate of pigs in Vietnam but increases profitability as measured by feed costs.
Keywords: Cassava KM94 Leaves; Carcass Characteristics; Feed Conversion Ratio; Feed Costs; Growing Pigs; Protein Deposition
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