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

Table 4 Assessment of C budget and balance in different treatments (Mg CO₂ ha⁻¹)

Items	CK		RA		RB		RC
Items	C input	C output	C input	C output	C input	C output	C input	C output
C input of Chinese milk vetch and rice	31.98		35.37		35.85		32.70
GHG (direct and indirect)		9.73		19.58		10.64		17.03
CO₂ cumulative emissions		16.86		21.21		21.64		19.78
Total	31.98	26.59	35.37	40.79	35.85	32.29	32.70	36.80
NECB	5.39		− 5.42		3.56		− 4.1

GHG represents greenhouse gas; CO₂ represents carbon dioxide; C represents carbon; NECB represents net ecosystem carbon budget

ISSN: 1750-0680