The size of homegardens used for plantation in the study area ranged from 0.015 to 0.5 ha. From the overall 357 homegardens, a total of 238 culturally important plant species belonging to 81 families were identified. Wenka kebele had the highest homegarden species (130 species belonging to 58 families), while Graram kebele had the least, with 59 species and 30 families (table1).
Table 1. Number of plant species in sampled kebeles
Study sites (Kebeles)
|
Number of botanical family
|
Number of species(richness)
|
Aba Libanos
|
47
|
112
|
Addisenagulit
|
43
|
94
|
Chimit
|
33
|
61
|
Denba
|
43
|
89
|
Desa Enese
|
40
|
75
|
Enerata
|
41
|
93
|
Graram
|
30
|
59
|
Kebi
|
30
|
63
|
Wenka
|
58
|
130
|
Yeboargina
|
40
|
76
|
Yebokla
|
35
|
67
|
Yetegan
|
42
|
89
|
Total
|
81
|
238
|
The collected 238 culturally important plant species were classified into 8 use categories based on Cook [33]. From the total plant species recorded 140(59%) were reported to be utilized for environmental uses,84(35%) food crops, 83(35%) medicinal plant species, 39(16.4%) fodder species, 57(24%) material use plant, 60(25%) fuel wood, 49(20.6%) social use plants and 1(0.42%) Poisonous plant (figure 2).
Among the 238 plant species, 15(6.3%) were climbers, 93(39%) were herbs, 69(29%) shrubs, other 61(25.6%) were trees (figure 3). Poaceae had the highest number of species recorded with 22(9.2%) species followed by Fabaceae with 21(8.8%) plant species and Asteraceae with 15(6.3%) species. Most homegarden species were perennials (83%) while annuals were the least (17%).
Cultural use classification of collected plant species
1.Food crops
A total of 84(35%) food crops used as sources of fruit, vegetables, cereals, beverages, flavorings, spices, gums were identified in the study area. An expansive number of species belonged to food were Poaceae (8 species), Rutaceae (7 species), Fabaceae (6 species), Moraceae and Rosaceae (5 species each), Brassicaceae, Lamiaceae and Solanaceae (4 species each), Alliaceae, Apiaceae, Asteraceae, Musaceae, Myrtaceae (3 species each), Anacardiaceae and Cupressaceae 2 species each, and other 23 families have single species representation. Of these food crops, fruit plants were represented by 38 (45%) species. A large number of fruits belonged to Rutaceae (6 species), Rosaceae and Moraceae had 5 species each. The fruit plant species kok (Prunus persica) and duba (Cucurbita pepo) were found in all kebeles. Foremost commonly utilized flavors were Rhamnus prinoides and the common vegetable crop that occurred in all sampled kebeles was Brassica carinata. The majority of food crops were herbs 35(41%) followed by shrubs 26(30.6%), trees18(21%) and climbers 6(7%).
2.Medicinal plants
A total of 83 plant species with medicinal values were recorded and this accounted for 35% of the total plant species documented. Species of the families Asteraceae, Rosaceae, Fabaceae, Rutaceae, Lamiaceae, Cucurbitaceae, Solanaceae, Poaceae were the most used for traditional remedy preparation representing 38.6% of all medicinal plants. The majority of medicinal plants were shrubs 31 (37. %) followed by herbs 21(25.3%), trees 23(27.7%) and climbers 8(9.6%). Justicia shimperiana, Ruta chalepensis, Zehneria scabra, Eucalyptus globulus, and Vernonia amygdalina were common medicinal plants in all study kebeles.
3.Environmental uses
Environmental useful plants were noted for their uses as fence, hedges, shade and ornamental uses. A total 140(59%) plant species under 66 Families were recorded for various Environmental uses as live fence, hedges, shade plant and ornamental value. Fabaceae contained the largest number of plant species (15 species) for environmental uses followed by Asteraceae 10, Rosaceae 8, Euphorbiaceae 7, Moraceae and Poaceae 6, Myrtaceae 5, Anacardiaceae 4, Celastraceae, Dracaenaceae, Lamiaceae, Oleaceae 3 species each, Apocynaceae, Arecaceae, Capparidaceae, Commelinaceae, Cupressaceae, Loganiaceae, Malvaceae, Rubiaceae, Rutaceae, Sapindaceae, Solanaceae, Tiliaceae, Verbanaceae had 2 species each. The larger number of plant species used for environmental uses were trees 54(38.6%), followed by shrubs 49(35%), herbs 30(21.4%), cimbers7(5%). 96.4% environmental useful plants were Perennials and 3.6% were annuals.
3.1 Live Fence
Live fence species constituted 112 plant species accounting for 47% of all the plant species documented, and 85.7% of the environmentally useful plants recorded. Plants recorded as live fence plants in all sampled kebeles were Justicia schimperiana, Eucalyptus globulus and Vernonia amygdalina.
3.2 Ornamental plants
Ornamental plants species covered 21% (50 species) of the total plant species recorded and 35.7% of the environmentally useful plants. Cupressus lusitanica was commonly reported among all the sample kebeles followed by Rosa richardii and Dahlia pinnata. Most of the ornamental plants were recorded from the Wenka kebele.
4.Materials
Plants categorized in this group were those species reported for their uses for construction materials, agricultural tools, roof thatch, diverse culturally useful instrument and making ropes. A total of 57 plant species (24%) were documented. The commonly reported plants cited were Eucalyptus globulus, Eucalyptus camaldulensis and Eucalyptus saligna.
5. Social use
The social use plants were the ones reported for their ritual and religious uses, stimulant drugs, smoking’s, cosmetics and baking agents. A total of 49 (20.6%) plant species under 25 families were identified for their social uses. The highest number of social useful plants were found in family Poaceae (7 species) followed by Cyperaceae (6 species) and Asteraceae and Lamiaceae have 5. The growth form analysis of social use plants indicated dominance of herbs 25(50%) followed by shrub 13(26%), trees 11(22%) and climber 1(2%).
5.1 Fragrant and stimulant plants
Individuals utilize fragrant plants for changing the scent of the encompassing or fabric that can be utilized as a family utensil or they can be utilized as an input of commercially made fragrances. 15(6.3%) fragrant plant species were identified in the study kebele. And from fragrant plants, Ruta chalepensis and Olea europaea subsp. cuspidata were common in all kebeles. 3(1.26%) stimulant plant species were recorded in the study area, Coffea arabica was reported at all study kebeles and Catha edulis was found widely dispersed.
5.2 Plants used for cooking
Ensete ventricosum and Galium aparinoides were found to be two (0.84%) plants utilized for bread and potato preparation.
6.Fodder
A total of 39(16.3%) plant species belonging to 19 families were found identified for their purposes as feed for cattle, sheep, and donkey. Poaceae, with 11 plant species, had recorded, followed by Fabaceae and Cyperaceae, with 5 and 4 plant species, respectively. Snowdenia polystachya was the most prevalent fodder plant, followed by Cenchrus ciliaris, Cynodon dactylon, Zea mays, Vernonia amygdalina, Vernonia myriantha and Malva verticillata.
7. Fuel
In the study area, there were 60 fuel plant species belonging to 30 botanical families, accounting for 25% of the total. The bulk of plant species used for fuel were from the familie Fabaceae. Moraceae and Myrtaceae accounted for 16.7% of fuel plant species, whereas Anacardiaceae, Asteraceae, Poaceae, and Rosaceae accounted for 20% of the fuel plant species in the study area.
8. Poison
Only1(0.42%) plant species was recorded under this category.
Direct matrix ranking
Direct matrix ranking results indicated that Cordia africana ranked as the most widely harvested plant for its multipurpose uses followed by Ficus sur (table2).
Table 2. Direct matrix ranking result of fifteen multipurpose plants
|
Use diversity
|
Species
|
food
|
Fodder
|
Environmental uses
|
medicine
|
Materials
|
fuel
|
Social uses
|
total
|
rank
|
Vernonia amygdalina Del.
|
0
|
5
|
5
|
5
|
2
|
4
|
5
|
26
|
3
|
Cordia africana Lam.
|
4
|
4
|
4
|
4
|
5
|
5
|
4
|
30
|
1
|
Cupressus lusitanica Mill.
|
3
|
3
|
4
|
0
|
5
|
4
|
0
|
19
|
11
|
Dracaena steudneri Engl.
|
0
|
4
|
3
|
5
|
0
|
0
|
5
|
17
|
14
|
Ficus surForssk.
|
5
|
4
|
5
|
4
|
3
|
4
|
3
|
28
|
2
|
Ficus vasta Forssk.
|
4
|
4
|
5
|
0
|
4
|
4
|
4
|
25
|
4
|
Acacia abyssinica Hochst. ex.
|
3
|
4
|
4
|
4
|
4
|
4
|
0
|
23
|
6
|
Albizia schimperiana Oliv.
|
0
|
4
|
3
|
4
|
5
|
4
|
4
|
24
|
4
|
Myrica salicifolia Hochst. ex A. Rich.
|
3
|
4
|
3
|
4
|
4
|
4
|
0
|
22
|
7
|
Syzygium guineense (Willd.) DC. subsp. Guineense
|
5
|
4
|
3
|
0
|
4
|
4
|
0
|
20
|
8
|
Olea europaea L. subsp.cuspidata (Wall. ex G.Don)Cif.
|
0
|
0
|
3
|
5
|
5
|
0
|
5
|
18
|
12
|
Prunus africana (Hook.f.)Kalkm.
|
0
|
0
|
3
|
0
|
5
|
5
|
5
|
18
|
12
|
Salix subserrata Willd.
|
0
|
4
|
3
|
0
|
4
|
4
|
5
|
20
|
8
|
Grewia ferruginea Hochst. exA. Rich.
|
4
|
5
|
3
|
4
|
0
|
4
|
0
|
20
|
8
|
Celtis africana Burm. f.
|
0
|
4
|
2
|
0
|
4
|
4
|
0
|
14
|
15
|
Total
|
31
|
53
|
53
|
39
|
54
|
54
|
40
|
|
|
Rank
|
7
|
3
|
3
|
5
|
1
|
1
|
5
|
|
|
User criteria 5 = best, 4 = very good, 3 = good, 2 = less used, 1 = least used, 0 = not used
Use value
Table3. The result of 12 informants interviewed about the multiple use of Cordia africana
Informants
|
Food
|
Fodder
|
Environmental uses
|
Fuel
|
Medicine
|
Material
|
Social use
|
Total Ui
|
A
|
5
|
3
|
3
|
4
|
4
|
5
|
5
|
4.1Uv1
|
B
|
4
|
4
|
4
|
3
|
3
|
5
|
4
|
3.8Uv2
|
C
|
4
|
5
|
3
|
4
|
4
|
5
|
5
|
4.3 Uv3
|
D
|
5
|
4
|
3
|
4
|
3
|
5
|
4
|
4 Uv4
|
E
|
3
|
3
|
4
|
3
|
3
|
5
|
4
|
3.7 Uv5
|
F
|
5
|
4
|
4
|
5
|
4
|
5
|
5
|
4.6 Uv6
|
G
|
4
|
5
|
5
|
3
|
4
|
5
|
4
|
4.4 Uv7
|
H
|
3
|
4
|
5
|
4
|
4
|
5
|
4
|
4 Uv8
|
I
|
3
|
5
|
4
|
3
|
3
|
5
|
5
|
4 Uv9
|
J
|
5
|
5
|
3
|
4
|
5
|
5
|
4
|
4.6 Uv10
|
K
|
3
|
3
|
4
|
4
|
4
|
5
|
5
|
4 Uv11
|
L
|
4
|
3
|
4
|
4
|
3
|
5
|
4
|
4 Uv12
|
Total
|
48
|
48
|
46
|
45
|
44
|
60
|
53
|
49.5 ∑Ui
|
Mean
|
4Uv food
|
4Uv fodder
|
3.83 Uv Eu
|
3.75 Uv fuel
|
3.67 Uv medicine
|
5Uv Material
|
4.42 Uv Su
|
4.1 Uv
|
The total use value of Cordia africana total use value was 4.1, and its largest use value was recorded for its material use.
Similarity among Homegardens
For all the plants collected across the 357 homegardens, Sorenson's Index was calculated. Table 4 shows the Species composition similarity index value across homegardens in the twelve kebeles.
Table 4. Level of Similarity index among kebeles in composition of plant species
Study kebeles
|
Wenka
|
Addis enagulit
|
Yeboargina
|
Kebi
|
Desa Enese
|
Aba Libanos
|
Denba
|
Chimt
|
Enerata
|
Graram
|
Yebokla
|
Yetgan
|
Wenka
|
1
|
|
|
|
|
|
|
|
|
|
|
|
Addisena gulit
|
0.46
|
1
|
|
|
|
|
|
|
|
|
|
|
Yeboargina
|
0.44
|
0.52
|
1
|
|
|
|
|
|
|
|
|
|
Kebi
|
0.41
|
0.51
|
0.6
|
1
|
|
|
|
|
|
|
|
|
Desa Enese
|
0.35
|
0.48
|
0.51
|
0.45
|
1
|
|
|
|
|
|
|
|
Aba Libanos
|
0.42
|
0.43
|
0.42
|
0.39
|
0.43
|
1
|
|
|
|
|
|
|
Denba
|
0.38
|
0.45
|
0.51
|
0.49
|
0.53
|
0.55
|
1
|
|
|
|
|
|
Chimt
|
0.26
|
0.38
|
0.4
|
0.4
|
0.46
|
0.33
|
0.48
|
1
|
|
|
|
|
Enerata
|
0.45
|
0.58
|
0.5
|
0.5
|
0.46
|
0.43
|
0.42
|
0.35
|
1
|
|
|
|
Graram
|
0.28
|
0.35
|
0.37
|
0.41
|
0.29
|
0.32
|
0.3
|
0.25
|
0.42
|
1
|
|
|
Yebokela
|
0.36
|
0.46
|
0.45
|
0.43
|
0.38
|
0.35
|
0.37
|
0.33
|
0.44
|
0.39
|
1
|
|
yetgan
|
0.43
|
0.58
|
0.6
|
0.52
|
0.5
|
0.46
|
0.51
|
0.39
|
0.52
|
0.37
|
0.43
|
1
|
The highest similarity index was found between Yboargena and Kbi, Yboargena and Ytegan, indicating that they shared 60% of the plant species. Chimt and Graram, on the other hand, had the lowest similarity values, meaning they shared only 25% of the plant species. The similarity index is larger than 0.5 in 36 % of the cases, and less than 0.5 in 64 % of the cases.