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Marie-Magdeleine C.,Inra Ur143 Unite Of Recherches Zootechniques | Mahieu M.,Inra Ur143 Unite Of Recherches Zootechniques | Philibert L.,Inra Ur143 Unite Of Recherches Zootechniques | Despois P.,Center Antilles Guyane | Archimede H.,Inra Ur143 Unite Of Recherches Zootechniques
Small Ruminant Research | Year: 2010

The effects of feeding wilted cassava foliage (WCF) on the growth of Martinik lambs and the parasite Haemonchus contortus (Hc) were evaluated. Thirty 6-month-old Martinik lambs (body weight: 20.3 ± 1.6 kg) were allocated to one of the three treatments. The basal diet consisted of Dichanthium spp. hay ad libitum plus cassava tuber (450. g/lamb/day). In addition, depending on the experimental treatment, they received alfalfa pellets (450 g/lamb/day) or WCF (650 g/lamb/day) or WCF (650. g/lamb/day) + PEG (25 g/lamb/day). At the beginning of the trial, each lamb was inoculated with a single dose of 10,000 third-stage larvae of Hc.The mean faecal egg count decreased by 41% in lamb fed WCF relative to the lucerne control level. Egg development to third-stage larvae was reduced by 60% when excreted by lambs fed on WCF compared to those fed on lucerne. Given the results obtained with animals receiving PEG, the positive effect of WCF on the reduction of Hc parasites may be explained by the action of condensed tannins. The action of the latter on worm fertility is suspected. Due to the high fill value (ADL) relative to the lucerne diet, the consumption of WCF provides limited total energy intake (48.0 g vs 57.6 g of digestible dry matter per kg of metabolic weight) and has a depressive effect on lamb growth (120.8 g/d vs 163.5 g/d). © 2010 Elsevier B.V. Source

Archimede H.,Inra Ur143 Unite Of Recherches Zootechniques | Gonzalez-Garcia E.,Inra Ur143 Unite Of Recherches Zootechniques | Despois P.,Center Antilles Guyane | Etienne T.,Inra Ur143 Unite Of Recherches Zootechniques | Alexandre G.,Inra Ur143 Unite Of Recherches Zootechniques
Journal of Animal Physiology and Animal Nutrition | Year: 2010

This study aimed to evaluate the substitution of imported corn and soybean by local feed resources from tropical production settings such as entire green banana and Gliricidia sepium forage as energy and protein sources, respectively, in sheep diets. Two experiments were conducted: first, a 'growth trial' and second, an in vivo digestion study. In the 'growth trial', 40 Martinik lambs [body weight (BW): 29.4 ± 3.6 kg; 6 months old) were used and distributed into four groups of 10 lambs each according to treatment: HBGl (banana + gliricidia at low level; 1500 g/day; 119 g/kg BW0.75), HBGh (banana + gliricidia at high level; 3000 g/day; 238 g/kg BW0.75), HBS (banana + soybean cake) and Control (corn + soybean cake). In digestion trial, four Martinik rams (BW: 57.2 ± 3.45 kg) fitted with ruminal and duodenal cannulae were used; treatments (HBG, HBS and Control) were similar but adjusted to metabolic body weight (MW) and just one level of gliricidia was used. Intake, average daily gain (ADG), feed intake to gain index (F:G), apparent total and ruminal digestibilities as well as nitrogen balance, microbial efficiency and volatile fatty acid (VFA) profile were monitored. Lambs fed HBGh had greater dry matter (DM) intake based on MW and ADG (173 g/day vs. 141 g/day; p < 0.001), whereas HBGl lambs showed the lowest ADG (71.5 g/day) and the worst F:G (14.4; p < 0.001). The DM, organic matter (OM), neutral detergent fibre and acid detergent fibre digestibilities were not influenced by treatment, whereas crude protein digestibility was higher (p = 0.024) in diets offered banana or corn + soybean cake (687 g/kg DM and 658 g/kg DM, respectively). Ruminal DM and OM digestibilities did not differ among treatments. Total or individual VFA concentrations were also not influenced by the diet. Higher (p = 0.006) ruminal fluid pH values were recorded for diets combining banana and gliricidia (6.54) or banana and soybean (6.39) until 3 h after a meal. As all animals on gliricidia- and banana-supplemented diets gained weight and maintained a positive N balance, it is concluded that green banana and gliricidia forage may be a viable alternative to replace conventional energy and protein supplements in sheep diets. © 2009 Blackwell Verlag GmbH. Source

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