Chemical Composition, Degradation Characteristics and Effect of Tannin on Digestibility of Some Browse Species from Kenya Harvested during the Wet Season원문보기
Osuga, I.M.
(Laboratory of Animal Science, Faculty of Life and Environmental Science, Shimane University)
,
Abdulrazak, S.A.
(Division of Research and Extension, Egerton University)
,
Ichinohe, T.
(Laboratory of Animal Science, Faculty of Life and Environmental Science, Shimane University)
,
Fujihara, T.
(Laboratory of Animal Science, Faculty of Life and Environmental Science, Shimane University)
A study was conducted with the objective of evaluating the nutritive value of some browse species from Kenya. The species evaluated included: Bauhinia alba, Bauhinia variegata, Bridelia micrantha, Calliandra calothyrsus, Carisa edulis, Cratylia argentea, Gliricidia sepium, Lantana camara, Maerua ang...
A study was conducted with the objective of evaluating the nutritive value of some browse species from Kenya. The species evaluated included: Bauhinia alba, Bauhinia variegata, Bridelia micrantha, Calliandra calothyrsus, Carisa edulis, Cratylia argentea, Gliricidia sepium, Lantana camara, Maerua angolensis, Sesbania micrantha and S. sesban. The browses were evaluated by their chemical composition including phenolics, in vitro gas production and tannin activity (tannin bioassay). All the species had high crude protein content (149-268 g/kg DM) and low NDF content (239-549 g/kg DM). The feeds had varying contents of total extractable tannins (TET) ranging from low (3-22 mg/g DM), moderate (42-58 mg/g DM) and high (77-152 mg/g DM). Calliandra calothyrsus had the highest tannin content. Significant (p<0.05) variation in gas production was recorded among the species. Sesbania micrantha had the highest (p<0.05) potential gas production while Gliricidia sepium had the highest (p<0.05) rate of gas production. Use of polyethylene glycol (PEG 6000), to assess the adverse affect of tannins, indicated that tannins in browse species with high tannin content had inhibitory effects on rumen microbial fermentation as indicated by the gas production. Estimated organic matter digestibility and metabolizable energy also increased with PEG addition. The results of this study indicate that such Kenyan browse species have the potential to be used as feed supplements for ruminant animals.
A study was conducted with the objective of evaluating the nutritive value of some browse species from Kenya. The species evaluated included: Bauhinia alba, Bauhinia variegata, Bridelia micrantha, Calliandra calothyrsus, Carisa edulis, Cratylia argentea, Gliricidia sepium, Lantana camara, Maerua angolensis, Sesbania micrantha and S. sesban. The browses were evaluated by their chemical composition including phenolics, in vitro gas production and tannin activity (tannin bioassay). All the species had high crude protein content (149-268 g/kg DM) and low NDF content (239-549 g/kg DM). The feeds had varying contents of total extractable tannins (TET) ranging from low (3-22 mg/g DM), moderate (42-58 mg/g DM) and high (77-152 mg/g DM). Calliandra calothyrsus had the highest tannin content. Significant (p<0.05) variation in gas production was recorded among the species. Sesbania micrantha had the highest (p<0.05) potential gas production while Gliricidia sepium had the highest (p<0.05) rate of gas production. Use of polyethylene glycol (PEG 6000), to assess the adverse affect of tannins, indicated that tannins in browse species with high tannin content had inhibitory effects on rumen microbial fermentation as indicated by the gas production. Estimated organic matter digestibility and metabolizable energy also increased with PEG addition. The results of this study indicate that such Kenyan browse species have the potential to be used as feed supplements for ruminant animals.
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문제 정의
In Kenya, there is generally scanty information available on the nutritive value ofthe trees and shrubs and especially on indigenous species. The objective of this study was to investigate the nutritive value of multipurpose trees and shrubs as feed for ruminants and the effect of tannins on estimated in vitro organic matter digestibility and metabolizable energy.
대상 데이터
Browse leaves from eleven species were used in this study. They include: Bauhinia alba, Bauhinia variegata, Bridelia micrantha, Calliandra calothyrsus, Carisa edulis, Cratylia argentea, Gliricidia sepium, Lantana camara, Maerua angolensis, Sesbania micrantha and Sesbania sesban.
데이터처리
Analysis of variance (ANOVA) was carried out on chemical composition, phenolics, in vitro gas production, degradability characteristics and digestibility estimates data using the General Linear Model (GML) procedure (SAS/StatView, 1999). The in vitro gas production data was analysed by two factorial design (species and time).
이론/모형
Incubation was carried out using the method of Menke and Steingass (1988) as modified by Makkar et al. (1995). Makkar et al.
성능/효과
It is concluded that the browse species used in this study could be good protein supplements to low quality basal diets. However, the high phenolics content and activity in some ofthe browse species could limit their nutritive value.
The NDF, ADF and ADL were highest (p<0.05) in Bridelia micrantha and lowest (p<0.05) in Maerua angolensis except Sesbania sesban, which had lowest ADL.
05) among the species. The NDF, ADF and ADL were highest (p<0.05) in Bridelia micrantha and lowest (p<0.05) in Maerua angolensis except Sesbania sesban, which had lowest ADL. The TEPH concentrations ranged between 223 mg/g DM to 9 mg/g DM.
05) variations among the browse species. The highest gas production values at 24 h of incubation were obtained with Sesbania sesban, Sesbania micrantha, Gliricidia sepium and Lantana camara. At 96 hour, Sesbania micrantha, Sesbania sesban, Maerua angolensis, Lantana camara, and Gliricidia sepium had higher gas production in that order.
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