The Effects of Rape Residue Mulching on Net Global Warming Potential and Greenhouse Gas Intensity from No-Tillage Paddy Fields

Table 1

Differences in soil total organic C (g kg⁻¹), organic C density (kg C ha⁻¹), and sequestered organic C (kg C ha⁻¹ season⁻¹) during a rice-growing season from NT paddy fields under different residue mulching treatments.

Treatments	Total organic C concentrations before direct seeding	Total organic C concentrations at harvesting	Organic C density before direct seeding	Organic C density at harvesting	Sequestered organic C
0 RRM	18.4±0.5^c	18.5±0.5^d	46166^c	46645^c	479^d
3000 RRM	19.5±0.6^b	20.0±0.5^c	49259^b	50425^b	1166^c
4000 RRM	20.2±0.7^a	20.9±1.76^b	51008^a	52744^ab	1736^b
6000 RRM	20.4±1.1^a	21.5±0.9^a	51476^a	54104^a	2629^a

Different letters in a column mean significant differences at the 5% level. Values are the means ± SD, 𝑛=3.