Poster (Scientific congresses and symposiums)
Intra-cultivar potential of Desmanthus spp. as a greenhouse gas mitigation strategy for tropical livestock pastoral systems
Vandermeulen, Sophie; Ramírez-Restrepo, Carlos Alberto; Singh, Sultan et al.
2015Tropical Agriculture Conference 2015, Meeting the Productivity Challenge in the Tropics
 

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Keywords :
ruminant; legumes; in vitro fermentation; methane; chemical composition; tropical grasslands
Abstract :
[en] Improved agricultural efficiency and reduction in the impacts of tropical livestock farming on habitat degradation require global approaches that enhance ruminant farming functionality in terms of feed use efficiency, emissions and food security. This study evaluated the in vitro mitigation potential of the prostrate to erect, herbaceous Desmanthus spp. pasture legume adapted to semiarid clay soil land types in northern Australia. D. bicornutus, D. leptophyllus and D. virgatus were seasonally harvested from commercial plots by Agrimix Pty. Ltd. Samples of the legumes and the control Rhodes grass (Chloris gayana) using ruminal fluid from grazing Brahman (Bos indicus) steers were incubated in vitro (Ankom RF1 Technology) for 24, 48 and 72 h. Overall, the in vitro organic matter degradability (OMD) and methane production between Desmanthus species differed (P < 0.001). Compared to the control (0.656 ± 0.027 proportion of total OM) at 48 h of incubation, D. leptophyllus showed lower OMD (0.479 ± 0.016), while D. bicornutus (0.688 ± 0.016) and D. virgatus (0.619 ± 0.015) were different from each other, but similar to the control. Methane production (ml/g OM) was 15.7 ± 1.54, 3.7 ± 0.89, 12.0 ± 0.95 and 11.7 ± 0.95, respectively. It is suggested that the impact of these attributes may benefit household farmers in developing economies to expand productivity, improve livelihoods and meet the growing food consumption. Further analyses of the intra-cultivar characteristics of Desmanthus spp. will complement the design of sustainable and efficient interventions across tropical pastoral feeding systems, with a particular emphasis on large-scale grazing operations.
Disciplines :
Phytobiology (plant sciences, forestry, mycology...)
Animal production & animal husbandry
Author, co-author :
Vandermeulen, Sophie ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Zootechnie
Ramírez-Restrepo, Carlos Alberto;  Commonwealth Scientific and Industrial Research Organisation - CSIRO > Agriculture
Singh, Sultan;  Indian Grassland and Fodder Research Institute - IGFRI > Plant Animal Relationship Division
Kinley, Rob;  Commonwealth Scientific and Industrial Research Organisation - CSIRO > Agriculture
Gardiner, Christopher P.;  James Cook University - JCU > School of Veterinary
Holtum, Joseph A.M.;  James Cook University- JCU > Terrestrial Ecosystems and Climate Change
Bindelle, Jérôme  ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Zootechnie
Hannah, Iain;  Agrimix Pty. Ltd.
Language :
English
Title :
Intra-cultivar potential of Desmanthus spp. as a greenhouse gas mitigation strategy for tropical livestock pastoral systems
Publication date :
November 2015
Event name :
Tropical Agriculture Conference 2015, Meeting the Productivity Challenge in the Tropics
Event place :
Brisbane, Australia
Event date :
16-18 novembre 2015
Audience :
International
Available on ORBi :
since 04 December 2015

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