Article (Scientific journals)
Manure amendment acts as a recommended fertilization for improving carbon sequestration efficiency in soils of typical drylands of China
Liang, Shuo; Sun, Nan; Wang, Shuhui et al.
2023In Frontiers in Environmental Science, 11
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Keywords :
dryland; influence factor; long-term fertilization; organic amendments; soil carbon sequestration efficiency; Environmental Science (all); General Environmental Science
Abstract :
[en] It is generally known that soil organic carbon (SOC) stocks tend to increase with an increase in C input, whereas the C sequestration efficiency (CSE), i.e., the conversion ratio of C input to SOC, differs depending on the amount and type of C input. However, there is still a need to better understand the impact of various fertilization practices on CSE. We studied the data from eight long-term experiments located in the main dryland region of China in order to comprehensively assess the key drivers of CSE in the plow layer considering nearly four decades of various fertilizer treatments, i.e., no fertilizer (CK); chemical nitrogen, phosphorus, and potassium (NPK/NP); chemical fertilizers plus manure (NPKM/NPM/NM); and straw (NPKS/NPS/NS). Our results showed that manure amendment had the most significant fertilization effect on SOC sequestration with an average CSE of 14.9%, which was significantly higher than that of chemical fertilization (9.0%) and straw return treatments (7.9%). In addition, manure amendment also had the highest average SOC increase rate of 684 kg C ha-1 yr-1. Variance partitioning analysis (VPA) illustrated that the CSE of the main dryland region of China was mostly controlled by edaphic characteristics (32.2%), especially the soil C/N ratio and clay content. VPA and structural equation modeling revealed that the magnitude and influencing factors driving CSE varied among different fertilizer treatments. Soil total N was the limiting factor for CSE in the CK treatment, whereas the soil C/N ratio and pH were the main explanatory factors for CSE in the long-term chemical NPK fertilizer treatment. The negative impact of C input from straw was the main driver of CSE under straw return treatments, though C input had a positive effect on the improvement of soil physical properties. However, when considering manure amendments, the improvement of soil nutrients and clay content controlled CSE, underlining the main positive direct effect of soil chemical properties. In a nutshell, our results recommend manure plus chemical fertilizers as a sustainable practice for improving the C sequestration rate and efficiency in dryland cropping systems.
Disciplines :
Agriculture & agronomy
Author, co-author :
Liang, Shuo ;  Université de Liège - ULiège > TERRA Research Centre ; State Key Laboratory of Efficient Utilization of Arid and Semi-Arid Arable Land in Northern China, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
Sun, Nan;  State Key Laboratory of Efficient Utilization of Arid and Semi-Arid Arable Land in Northern China, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
Wang, Shuhui ;  Université de Liège - ULiège > TERRA Research Centre ; State Key Laboratory of Efficient Utilization of Arid and Semi-Arid Arable Land in Northern China, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
Colinet, Gilles  ;  Université de Liège - ULiège > TERRA Research Centre > Echanges Eau - Sol - Plantes
Longdoz, Bernard  ;  Université de Liège - ULiège > Département GxABT > Biosystems Dynamics and Exchanges (BIODYNE)
Meersmans, Jeroen ;  Université de Liège - ULiège > TERRA Research Centre > Echanges Eau - Sol - Plantes
Wu, Lianhai;  Net Zero and Resilient Farming, Rothamsted Research, Okehampton, United Kingdom
Xu, Minggang;  State Key Laboratory of Efficient Utilization of Arid and Semi-Arid Arable Land in Northern China, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China ; Institute of Eco-Environment and Industrial Technology, Shanxi Agricultural University, Taiyuan, China
Language :
English
Title :
Manure amendment acts as a recommended fertilization for improving carbon sequestration efficiency in soils of typical drylands of China
Publication date :
2023
Journal title :
Frontiers in Environmental Science
eISSN :
2296-665X
Publisher :
Frontiers Media S.A.
Volume :
11
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
NSCF - National Natural Science Foundation of China [CN]
CSC - China Scholarship Council [CN]
Funding text :
This study was supported by the National Natural Science Foundation of China (42177341). SL was supported by the China Scholarship Council (No. 202003250099).
Available on ORBi :
since 24 September 2023

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