Enteric methane emission factors of smallholder dairy farming systems across intensification gradients in the central highlands of Ethiopia

Table 7 Emission factors (mean ± sd., kg CH₄ /head/year) for different categories of cattle

Farming systems	Emission factors (kg CH₄ /head/year)
Farming systems	Adult female	Adult male	Growing female	Growing male	Calf (≤ 1)	Fattening male
Urban	72. 71 ± 6.24^a	30.15 ± 2.43^a	34.21 ± 2.71^a	36.31 ± 2.78^a	26.67 ± 2.3^a	NA
Peri-urban	69.43 ± 5.59^b	43.28 ± 3.29^b	35.63 ± 3.14^b	37.27 ± 3.12^a	25.89 ± 2.25^a	NA
Rural	33.68 ± 2.86^c	35.92 ± 2.84^a	30.2 ± 2.61^c	33.01 ± 2.46^b	23.2 ± 2.1^b	36.82 ± 3.23
Mean	64.01 ± 5.23	37.84 ± 2.81	36.39 ± 3.18	38 .01 ± 3.16	26.5 ± 2.2

Different superscript letters in the same column indicate significant differences between farming systems (P < 0.05)

ISSN: 1750-0680