Abstract
Protein and condensed tannin-rich foliage (TRF) are potentially useful as nutraceuticals. The main objective of this study was to evaluate the diet and anthelmintic properties of three TRF types both individually and in combination. We hypothesized that synergistic or antagonistic effects on feed and anthelmintic values related to associations between TRF types may occur. Nutritional and anthelmintic characteristics of Leucaena leucocephala, Manihot esculenta, Cajanus cajan and a mixture of the compounds were evaluated using alfalfa pellets as a control. TRF ingredients were combined with Dichantium hay (48 and 52% of dry matter intake respectively) in mixed diets were consumed by Creole goat kids. Measurements were carried out in animals without parasites and in animals artificially infected with Haemonchus contortus. Individual feed intake and the digestibility of each diet was measured along with kid growth. There were no significant differences between the growth rates of pre-infected animals and animals fed mixed diets that included alfalfa. A strong anthelmintic activity is observed with Leucaena leucocephala contrary to other TRFs. This work confirms variable dietary and anthelmintic properties of TRF. The combination of TRF did not have synergistic or antagonistic effects on feed value or the anthelmintic potential of TRF.
Highlights
The fight for food security and considerations regarding the worsening of global warming have produced public opinion that is increasingly hostile to the use of synthetic chemical molecules in the food production chain, which prompted us to evaluate existing agro systems and farming practices[1]
The main objective of this study is to evaluate the nutraceutical properties of Leucaena leucocephala, Manihot esculenta, Cajanus cajan pellets and a mixture of the three foliage types
Dichanthium spp hay is characterized by its low crude protein (CP) levels and high fibre content, which indicates that it is a low quality grass
Summary
The fight for food security and considerations regarding the worsening of global warming have produced public opinion that is increasingly hostile to the use of synthetic chemical molecules in the food production chain, which prompted us to evaluate existing agro systems and farming practices[1]. Integrated control of gastrointestinal nematodes of livestock is an ongoing area of research With this in mind, protein and condensed tannin-rich foliage (TRF), including legumes, are potentially useful nutraceutical compounds. Dietary concentrations of CTs were suspected to explain the large degree of variability observed within animal responses to CTs in relation to dose-dependent anthelmintic[5], methane emission[4] and protein digestibility effects reported in the literature. The main objective of this study is to evaluate the nutraceutical properties of Leucaena leucocephala, Manihot esculenta, Cajanus cajan pellets and a mixture of the three foliage types These forages were chosen to have plants with a large gradient of CTs content. Other secondary metabolites (hydrolysable tannins, saponins...) contained in TRFs could have anthelmintic activity
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