Comparison of carbon footprint and net ecosystem carbon budget under organic material retention combined with reduced mineral fertilizer

Table 3 Average annual GHG emissions and C footprint during crop growth seasons over the two years (kg CO_2-eq ha⁻¹)

T	Indirect emission						Direct emission		Average GHG emissions	Yield ( kg ha⁻¹)	Carbon footprint ( kg CO₂-eq kg⁻¹ grain)
T	N	P	K	Diesel	Electricity	Pesticides	CH₄	N₂O	Average GHG emissions	Yield ( kg ha⁻¹)	Carbon footprint ( kg CO₂-eq kg⁻¹ grain)
CK	1531	18	73	476	1048	462	5863c	260	9731c	15209b	0.63c
RA	1301	18	73	476	1048	462	16037a	169	19584a	19479a	1.01a
RB	1206	18	73	476	1048	462	7164c	189	10636c	20530a	0.52c
RC	1110	18	73	476	1048	462	13577b	261	17025b	20124a	0.85b

T represents treatment; GHG represents greenhouse gas; C represents carbon; yield represents Chinese milk vetch straw and rice biomass. The different lowercase letters indicate significant differences among treatments at P < 0.05

ISSN: 1750-0680