Sustainable land management interventions lead to carbon sequestration in plant biomass and soil in a mixed crop-livestock system: the case of Geda watershed, central highlands of Ethiopia

Ecological Processes

Table 5 Effects of sub-watershed, landscape position, and land use on ecosystem carbon stocks

	N	Ecosystem carbon stocks (Mg ha⁻¹)
	N	Plant biomass	Soil	Total carbon stock
Sub-watershed (SW)
Untreated	40	0.14^b	16.06^b	16.20^b
Treated	50	2.52^a	24.40^a	26.92^a
Landscape position (LP)
Untreated upper	20	0.12^c	16.29^c	16.41^b
Lower	20	0.16^c	15.82^c	15.98^b
Treated upper	20	1.09^b	25.94^a	27.03^a
Lower	30	3.47^a	23.37^b	26.84^a
Land-use types (LU)
Untreated crop	20	0.16^c	15.97^c	16.13^c
Grazing	20	0.12^c	16.15^c	16.27^c
Treated crop	20	0.95^b	27.43^a	28.38^a
Grazing	20	0.84^b	23.19^b	24.03^b
Tree lucerne	10	9.01^a	20.75^b	29.76^a
P-SW		***	***	***
P-LP		***	*	ns
P-LU		***	**	**

Means within columns under each topic followed by different letter(s) are significantly different from each other at P ≤ 0.05; *significant at P ≤ 0.05; **significant at P ≤ 0.01;***significant at P ≤ 0.001; ns non-significant