wild and semi-wild edible plants: diversity, use in household ...getachew addis, zemede asfaw,...
TRANSCRIPT
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Wild and semi-wild edible plants: diversity, use in household food sovereignty in remote parts of southern Ethiopia and nutritional benefits
Getachew Addis, Zemede Asfaw, Zerihun Woldu and JJ Baidu-Forson
September 26, 2013Accra, Ghana
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Presentation outline
� Introduction� Objectives� The study area� Materials and Methods� Results and Discussions� Conclusions & recommendations� Acknowledgements
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Ethnobotany i n Ethiopia� Ethnobotany as a practice : long years
� Earliest literature focus on traditional medicine
� Francisco Alvares of 16th Century
� Meshafa Fews of the 17th Century & Meshafa Madhanit of 18th Cent.
� James Bruce (1768)
� G.W. Schimper (1837)
� N.I. Vavilov (1920-30)
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� Ethnobotany as a science in Ethiopia (recent)Qualitative� I.E. Siegenthaler (1960)� Amare Getahun (1974)� J. Abbink (1993)� Zemede Asfaw and Ayele Nigatu (1995)
Quantitative (Since 2000)� MSc and PhD students � Few others
Ethnobotany in Ethiopia cont’d
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WEPS� Wider use of WEPS
� Limited documented information on WEPS
� Acculturation , displacementand diminishingbiodiversity lead to loss of the IK & WEPS
cont’d
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OBJECTIVES
� Study KAP on WEPS,
� Study consumption pattern of edible parts at household level,
� Study nutritional composition of selected edible parts,
� Effect of processing on nutritional and other compositions.
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STUDY AREASReconnaissance survey: Two districts
Konso districtHamar district
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STUDY AREA Cont’d : Hamar
BuskaDimeka
Qola-QejaGebo
Asile
DEM of Hamar showing ethnobotanical and floristic data collection sites
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HamarCommunity
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STUDY AREA Cont’d : Konso
DEM of Konso showing ethnobotanical and floristic data collection sites
Mesoya
Keserkio
Doketu
Addis Gebere
Jarso
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Konso landscape and terracing
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Local practice of Field gene bank
The walled village of Doketu & its vegetation
Lowland
Mura Poqalla: Forest of the king
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L. hastata collection
Food habit
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Data Collection and Analysis� Community based study� Laboratory investigation� Data analysis
MATERIALS & METHODS
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� Selection of study area� Reconnaissance survey
� Preferential selection (Districts and communities)
� Stratified sampling (Agroecy & Distrbn of Kebeles)
� Multistage Kebeles ---- PrimaryVillages---- Secondary
Cont’d
1. CMMUNITY BASED STUDY
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� Households: main study (670) and sub-study (101)
n = Z2*P*(1-P)
d2
� Ethnobotanical data collection1.1. Guided field interview
1.2. Focus Group Discussion
1.3. Household interview
MAT. & MET. Cont’d
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� Nutritional analysis� Proximate composition (M+E+P+A+CF + C)
� Minerals (Ca, Mg, Fe, Zn, Mn & Cu + Cd & Pb)
� Amino Acids (profile)
�Antinutritional factors� Phenolics� Tannins� Phytic acid� Oxalates
Cont’d
Antioxidants
2. LABORATORY INVESTIGATIONS
}
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Cont’d Proximate Composition15 Edible parts (Hamar & Konso)
Dried (Moisture etn.)
Nitrogen (Microjeldhal)Ether extractive(Soxhlet)
Crude FiberProtein
X 6.25
Ash (Furnace)
MineralsCa, Mg, Fe, Zn, Mn, Cu, Cd, Pb
Carbohydrate = 100 - (M+E+P+A+CF)Amino acids
REF. : AOAC (1995)AOAC (2000)AACC (2000)
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“Antinutritional factors”Phenolics (GAE)
Folin-Ciocalteu reagent(Singleton and Rossi, 1965)
Tannins (Catechin eqt.)Modified vanillin assay (Burns, 1971, Maxon and Rooney, 1972 Price et al., 1978 and Sadasivam and Manickam, 1992)
Phytic acidPrecipitation analysis (Thompson and Erdman, 1982)
Oxalates (Total & Soluble)HPLC (Savage et al., 2000)
Cont’d
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Effect of processing on some quality parameters of GLVs
The study plants
Coccinia grandis Trigonella foenum-graecum
(ivy gourd) (fenugreek)
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Processing methods
Drying�Lyophilizer
�Cross flow drier
�Shade
�Sun
Blanching�Boiling water
�Saline water (1% NaCl)
�SteamBlanching & Drying combination treatments
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Parameters �Carotenoids
�“Antinutritional factors”
�Antioxidant activity
Cont’d
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� Data entry
� Descriptive analysis
� Quantitative ethnobotanical tools� Preference ranking� Fidelity level� Classification� Ordination
�Index of ingestion ----- concept used
Cont’d
3. DATA ENTRY & ANALYSIS
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WO
WIII =
(Addis et al., 2009)
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� Ethnobotanical knowledge on WEPS� Knowledge conveyed through practice and folklore
� 206 EWSWPS (185 at species, 6 Genera & 15 LN)� 143 Hamar� 138 Konso
75 (36.4%) of the species common to both Hamar & Konso
Results and Discussion
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Cont’d
DoketuJarso
Mesoya
Asile
BuskaDimeka Zuria
Gebo
Qola-Qeja
-0.48 -0.32 -0.16 0 0.16 0.32 0.48
Axis 1
-0.48
-0.32
-0.16
0
0.16
0.32
0.48
0.64
Axi
s 2
Presence/absence of WEPS (Ordination & classification)
Ham
ar
Kon
so
Kon
so
Ham
ar
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1.7%0.8%0.8%2.1%4.2%
7.9%
12.9%
27.1%
42.5%
0
20
40
60
80
100
120
Fruit Leaf &tendershoot
Root &tuber
Seed Flower& nectar
Gum &latex
Aerial part Stem Otherparts
Plant part
Num
ber
of p
lant
par
tsCont’d
Plant parts (240)
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30Ximenia caffra
Maerua angolensis
Moringa stenopetala
Hamar
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Sterculia africana
Adenia ellenbekii
Physalis peruviana
Leptadenia hastata
WEPS in home gardenKonso
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Portulaca
Amaranthus
Konso
Ximenia
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Cont’d
Preparations
Num
ber
of p
lant
par
ts
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� Preference � Taste:
Fruits: Opuntia ficus-indica (Konso)Grewia erythraea (Hamar)
GLVs (K & H)Leptadenia hastata
� Low Food Stock (K & H)Leptadenia hastata
Cont’d
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� Cash earningLeptadenia hastata
Balanites rotundifolia (seed)
Cont’d
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�Consumption pattern at household level- All study participants consumed WEPS- Intensity and frequency of consumption depends on:
- Food stock- Season
Cons.-pattern in Hamar (Table con_pat_Ham)
Cons.-pattern in Konso (Table con_pat_Xon)
Cont’d
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Cont’d
� Nutritional and antinutritional factors� Edible plant parts
� 13 GLVs� One tuber� One fruit
� Tests� Proximate (Protein, fiber, minerals)� Selected minerals (Table 25)� Selected antinutritional factors (Table 26)� Amino acids (Lysine rich)
�Coccinia grandis
�Trigonella foenum graecum
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Effect of processing � Test ingredients
�Carotenoids (direct sun light)
Cont’d
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Cont’d
Carotenoid standardsTrigonella foenum-graecum (A) and Coccinia grandis (B)
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�Antinutritional factors (each has its own property and must be dealt individually)
�Antioxidant activity (sun)
Cont’d
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� Medicine
Nutraceutical
Other parts
Cont’d
Ximenia caffra
�Other major uses
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� Beehive making� Low impact on sustainability (good resilience)
� Destructive harvesting (low/no resilience to harvesting)
Cont’d
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Impact of harvesting plants for beehive making, Hamar
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Agroforestry system : Konso
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Conclusions & recommendations 1. There is higher diversity and dietary significance of
WEPS
2. Selective harvesting (destructive) for different uses other than edibility is a threat to many tree and shrub WEPS
3. There is wild-cultivated continuum of WEPS in both communities
4. GLVs (dried) are rich in protein & lysine but requires bioavailability study
5. Consume assorted vegetables & others
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Cont’d
5. Promotion: Stepwise
� first line� Moringa stenopetala (Leaf)
� Solanum americanum (Leaf)
� Amaranthus hybridus (grain) Konso
� Opuntia ficus-indica (Fruit)
}}
Hamar & Konso
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Policy recommendations
� Identify, conserve & conduct research (multidisciplinary) on WEPS
� Develop and Promote WEPS in stepwise manner
� Create/raise community awareness on the benefit of conserving & using (for food) WEPs
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Acknowledgements
� Dr V. Prakash� Getachew Tadesse � Professor Sebsebe Demissew � Professor Ensermu Kelbessa � Dr Teshome Sormessa � Dr Akhihiko Nagao � Dr Girma Akalu � Dr Alemayehu Worku � Konso & Hamar � Staff of EHNRI� Staff of CFTRI� AAU� My family
� EHNRI � AAU � UNU � CFTRI � NH of AAU � NMA � Hamar & Konso
Respected individuals Organizations
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49Ameseginalehu !!