In vitro rumen degradability of tropical legumes and their secondary metabolites depends on inoculum source.

Autor: Artiles-Ortega E; Laboratory for Animal Nutrition and Animal Product Quality, Department of Animal Sciences and Aquatic Ecology, Faculty of Bioscience Engineering, Ghent University, 9000, Ghent, Belgium. einarao@uclv.edu.cu.; Departamento de Medicina Veterinaria Y Zootecnia, Facultad de Ciencias Agropecuarias, Universidad Central 'Marta Abreu' de Las Villas, carretera a Camajuaní km 5½, 54 830, Santa Clara, Cuba. einarao@uclv.edu.cu.; Centro de Investigaciones Agropecuarias (CIAP), Facultad de Ciencias Agropecuarias, Universidad Central 'Marta Abreu' de Las Villas, carretera a Camajuaní km 5½, 54 830, Santa Clara, Cuba. einarao@uclv.edu.cu., de la Fé-Rodríguez PY; Departamento de Medicina Veterinaria Y Zootecnia, Facultad de Ciencias Agropecuarias, Universidad Central 'Marta Abreu' de Las Villas, carretera a Camajuaní km 5½, 54 830, Santa Clara, Cuba., Reguera-Barreto B; Departamento de Medicina Veterinaria Y Zootecnia, Facultad de Ciencias Agropecuarias, Universidad Central 'Marta Abreu' de Las Villas, carretera a Camajuaní km 5½, 54 830, Santa Clara, Cuba., Lima-Orozco R; Departamento de Medicina Veterinaria Y Zootecnia, Facultad de Ciencias Agropecuarias, Universidad Central 'Marta Abreu' de Las Villas, carretera a Camajuaní km 5½, 54 830, Santa Clara, Cuba.; Centro de Investigaciones Agropecuarias (CIAP), Facultad de Ciencias Agropecuarias, Universidad Central 'Marta Abreu' de Las Villas, carretera a Camajuaní km 5½, 54 830, Santa Clara, Cuba., Fievez V; Laboratory for Animal Nutrition and Animal Product Quality, Department of Animal Sciences and Aquatic Ecology, Faculty of Bioscience Engineering, Ghent University, 9000, Ghent, Belgium.
Jazyk: angličtina
Zdroj: Tropical animal health and production [Trop Anim Health Prod] 2022 Sep 29; Vol. 54 (5), pp. 330. Date of Electronic Publication: 2022 Sep 29.
DOI: 10.1007/s11250-022-03327-z
Abstrakt: In this study, the in vitro apparent rumen degradability of organic matter (ARDOM) and plant secondary metabolites (ARDPSM) of three tropical legumes (Mucuna pruriens, Canavalia ensiformis, and Leucaena leucocephala) were assessed. For this, 3 experiments were set up, i.e., single end-point incubations (24 h) with ruminal inoculum from either Belgian or Cuban sheep, as well as kinetic assessments (0 h, 2 h, 4 h, 6 h, 8 h, 10 h, 12 h, and 24 h) inoculum from Belgian sheep. L-mimosine, L-canavanine, Concanavalin A (Con A), and trypsin inhibitor (TI) were the plant secondary metabolites (PSM) targeted in this study. In all three experiments, both beans, as well as forage/bean meals of M. pruriens and C. ensiformis and their PSM, were extensively degraded during 24 h incubation, irrespective of the inoculum source (0.44 to 0.70 and 0.43 to 0.78 g/g of organic matter (OM) for ARDOM, respectively, and > 0.80 g/g for L-canavanine, > 0.76 TIU/TIU for TI, and > 0.95 g/g for Con A, for both legumes). Forage meal of L. leucocephala was considerably less degraded, with apparent ruminal degradabilities of 0.20 g/g OM and 0.35 g/g OM after 24 h incubation with Belgian or Cuban sheep inoculum, respectively. This could - at least partially - be related to L-mimosine, present in L. leucocephala, which was hardly degraded in the Belgian incubation, while a more extensive ruminal breakdown was observed under the Cuban conditions (0.05 g/g PSM vs. 0.78 g/g PSM, respectively). The negative effect of L-mimosine on OM degradability was supported in an additional in vitro experiment with straw and inoculum from Belgian sheep, as ruminal degradation of straw was 31% lower when pure L-mimosine was supplemented.
(© 2022. This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply.)
Databáze: MEDLINE
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