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. 2022 Nov 28;12:20512. doi: 10.1038/s41598-022-23461-w

Table 2.

Possible contribution of Buffel, Napier and Rhodes grasses to meet total feed demand (%) under Scenario A and Scenario B, calculated based on the area suitable for individual grass assuming that all land will be used only for monocrop culture production under predicted future conditions, if (A) 15% and (B) 10% of total land is used for pasture. F (LY) = ‘fertilized (business as usual, average yield 5.7 tons per ha)’, F (HY) ‘fertilized (highest reported yield for the species as per Table 1)’.

(A) Possible contribution from each grass species to feed demand (%)
Scenario Region Buffel grass Napier grass Rhodes grass
F (LY) F (HY) F (LY) F (HY) F (LY) F (HY)
Current Amhara 25 69 4 23 27 87
Oromia 22 62 2 9 26 83
Tigray 32 88 0 0 28 89
SNNP 30 85 6 30 31 99
Predicted Scenario A if 15% of total land is used for pasture
Future GISS-E2-R_Cold Amhara 29 82 7 36 35 109
Oromia 32 91 8 41 27 86
Tigray 32 91 0 0 24 75
SNNP 29 80 8 41 28 88
Future_17 GCMs Amhara 33 93 9 48 36 115
Oromia 33 93 10 50 31 96
Tigray 35 98 0 0 31 97
SNNP 31 87 11 60 30 95
Future HadGEM2-ES_hot Amhara 29 83 11 57 39 122
Oromia 35 97 11 57 28 90
Tigray 37 103 0 0 29 90
SNNP 32 89 11 58 27 85
Predicted Scenario B if 15% of total land is used for pasture
Future GISS-E2-R_Cold Amhara 19 52 4 23 22 69
Oromia 21 58 5 26 17 55
Tigray 20 57 0 0 15 48
SNNP 18 51 5 26 18 56
Future_17 GCMs Amhara 21 59 6 31 23 73
Oromia 21 59 6 32 19 61
Tigray 22 62 0 0 19 61
SNNP 20 55 7 38 19 60
Future HadGEM2-ES_hot Amhara 19 52 7 36 24 77
Oromia 22 62 7 36 18 57
Tigray 23 65 0 0 18 57
SNNP 20 56 7 37 17 54
(B) Possible contribution from each grass species to feed demand (%)
Scenario Region Buffel grass Napier grass Rhodes grass
F (LY) F (HY) F (LY) F (HY) F (LY) F (HY)
Current Amhara 25 69 4 23 27 87
Oromia 22 62 2 9 26 83
Tigray 32 88 0 0 28 89
SNNP 30 85 6 30 31 99
Predicted Scenario A if 10% of total land is used for pasture
Future GISS-E2-R_Cold Amhara 19 55 5 24 23 73
Oromia 22 61 5 28 18 58
Tigray 22 61 0 0 16 50
SNNP 19 54 5 27 19 59
Future_17 GCMs Amhara 22 62 6 32 24 77
Oromia 22 62 6 34 20 64
Tigray 23 65 0 0 20 65
SNNP 21 58 8 40 20 64
Future HadGEM2-ES_hot Amhara 20 55 7 38 26 81
Oromia 23 65 7 38 19 60
Tigray 24 68 0 0 19 60
SNNP 21 59 7 39 18 57
Predicted scenario B if 10% of total land is used for pasture
Future GISS-E2-R_Cold Amhara 12 35 3 15 15 46
Oromia 14 38 3 18 12 36
Tigray 14 38 0 0 10 32
SNNP 12 34 3 17 12 37
Future_17 GCMs Amhara 14 39 4 20 15 48
Oromia 14 39 4 21 13 41
Tigray 15 41 0 0 13 41
SNNP 13 37 5 25 13 40
Future HadGEM2-ES_hot Amhara 12 35 5 24 16 51
Oromia 15 41 5 24 12 38
Tigray 15 43 0 0 12 38
SNNP 13 37 5 24 11 36

All values are presented as ± 28%, based on the mean, min and max yield for each grass species under Scenario A and Scenario B.