TY - JOUR
T1 - Organic Carbon Sequestration in Soil Humic Substances As Affected by Application of Different Nitrogen Fertilizers in a Vegetable-Rotation Cropping System
AU - Li, Meng
AU - Hu, Hualing
AU - He, Xiaosong
AU - Jia, Jinhu
AU - Drosos, Marios
AU - Wang, Guoxi
AU - Liu, Fulai
AU - Hu, Zhengyi
AU - Xi, Beidou
PY - 2019/3/20
Y1 - 2019/3/20
N2 -
Little is known on the effect of application of different nitrogen (N) fertilizers on soil organic carbon (SOC) sequestration in soil humic substances (HS). We investigated HS molecular characteristics in an Orthic Acrisol, southwestern China, under 2-year field fertilization of a urea (U), a polymer-coated urea (PCU) and a biochar-coated urea (BCU) using
13
C-CPMAS-NMR spectroscopy. Results showed that N fertilization promoted SOC sequestration into HS and favored alkyl-C and aromatic-C rather than O-alkyl-C and carbonyl-C for humic acids and humin in soil. Application of PCU and BCU may better enhance vegetable yield, SOC sequestration, and HS stability than the U application, which may benefit from longer time of N existence and higher total N in soil. Among the N treatments, BCU application mostly affected the compositions and stability of SOC in the HS for the OC input and prime effect of biochar for SOC transformation.
AB -
Little is known on the effect of application of different nitrogen (N) fertilizers on soil organic carbon (SOC) sequestration in soil humic substances (HS). We investigated HS molecular characteristics in an Orthic Acrisol, southwestern China, under 2-year field fertilization of a urea (U), a polymer-coated urea (PCU) and a biochar-coated urea (BCU) using
13
C-CPMAS-NMR spectroscopy. Results showed that N fertilization promoted SOC sequestration into HS and favored alkyl-C and aromatic-C rather than O-alkyl-C and carbonyl-C for humic acids and humin in soil. Application of PCU and BCU may better enhance vegetable yield, SOC sequestration, and HS stability than the U application, which may benefit from longer time of N existence and higher total N in soil. Among the N treatments, BCU application mostly affected the compositions and stability of SOC in the HS for the OC input and prime effect of biochar for SOC transformation.
KW - C-CPMAS-NMR spectroscopy
KW - biochar
KW - nitrogen addition
KW - Slow-release nitrogen fertilizers (SRNF)
KW - soil organic matter
UR - http://www.scopus.com/inward/record.url?scp=85062830646&partnerID=8YFLogxK
U2 - 10.1021/acs.jafc.8b07114
DO - 10.1021/acs.jafc.8b07114
M3 - Journal article
C2 - 30807137
AN - SCOPUS:85062830646
SN - 0021-8561
VL - 67
SP - 3106
EP - 3113
JO - Journal of Agricultural and Food Chemistry
JF - Journal of Agricultural and Food Chemistry
IS - 11
ER -