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Nutritional Characteristics of Forage Grown in South of Benin
Musco, Nadia,Koura, Ivan B.,Tudisco, Raffaella,Awadjihe, Ghislain,Adjolohoun, Sebastien,Cutrignelli, Monica I.,Mollica, Maria Pina,Houinato, Marcel,Infascelli, Federico,Calabro, Serena Asian Australasian Association of Animal Productio 2016 Animal Bioscience Vol.29 No.1
In order to provide recommendations on the most useful forage species to smallholder farmers, eleven grass and eleven legume forages grown in Abomey-Calavi in Republic of Benin were investigated for nutritive value (i.e. chemical composition and energy content) and fermentation characteristics (i.e. gas and volatile fatty acid production, organic matter degradability). The in vitro gas production technique was used, incubating the forages for 120 h under anaerobic condition with buffalo rumen fluid. Compared to legume, tropical grass forages showed lower energy (8.07 vs 10.57 MJ/kg dry matter [DM]) and crude protein level (16.10% vs 19.91% DM) and higher cell wall content (neutral detergent fiber: 63.8% vs 40.45% DM), respectively. In grass forages, the chemical composition showed a quite high crude protein content; the in vitro degradability was slightly lower than the range of tropical pasture. The woody legumes were richer in protein and energy and lower in structural carbohydrates than herbaceous plants, however, their in vitro results are influenced by the presence of complex compounds (i.e. tannins). Significant correlations were found between chemical composition and in vitro fermentation characteristics. The in vitro gas production method appears to be a suitable technique for the evaluation of the nutritive value of forages in developing countries.
Fabio, Zicarelli,Calabro, Serena,Piccolo, Vincenzo,D'Urso, Simona,Tudisco, Raffaella,Bovera, Fulvia,Cutrignelli, Monica I.,Infascelli, Federico Asian Australasian Association of Animal Productio 2008 Animal Bioscience Vol.21 No.1
In vivo and in vitro digestibility of 6 diets with a forage to concentrate ratio (F/C) ranging from 100 to 50:50 (diet 1: all hay, diet 2: 90:10, diet 3: 80:20, diet 4: 70:30, diet 5: 60:40, diet 6: 50:50) were investigated using 6 buffaloes in a $6{\times}6$ Latin square design. For the in vivo trial, the individual faeces of buffaloes were collected 3 times per day for 7 days. Individual pooled faeces and samples of each diet were analysed for chemical composition and insoluble acid ash (AIA) contents in order to estimate the coefficient of apparent digestibility (ADC). On the last day of the in vivo trial a sample of faeces was collected from each animal and used as inoculum for the in vitro test, using the gas production technique (IVGPT). The in vivo organic matter digestibility (ADC) rose as the percentage of concentrate increased up to the 70:30 (F/C) diet (67.01, 73.03, 78.06 and 79.05, respectively for diets 1, 2, 3 and 4); the other two diets (60:40 and 50:50 F/C) unexpectedly did not follow this trend (75.11 and 79.06, respectively for diet 5 and 6). However, these data agree with the results of the in vitro trial. The ADC was positively correlated with the dOM (p<0.001), but not with the gas production at different times; cumulative gas production recorded at the end of incubation (OMCV) showed an irregular trend and was not closely correlated to degraded OM. Estimation of in vivo digestibility from in vitro fermentation data was acceptable, despite leaving room for improvement.