Physically separated soil organic matter pools as indicators of carbon and nitrogen change under long-term fertilization in a Chinese Mollisol.

Autor: Mustafa A; Key Laboratory of Arable Land Quality Monitoring and Evaluation, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, China; Institute of Chemistry and Technology of Environmental Protection, Faculty of Chemistry, Brno University of Technology, Purkynova 118, 612 00, Brno, Czech Republic., Saeed Q; College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, Shaanxi, China., Karimi Nezhad MT; Department of Forest Ecology, The Silva Tarouca Research Institute for Landscape and Ornamental Gardening, Lidicka, 25/27, Brno, 60200, Czech Republic., Nan S; Key Laboratory of Arable Land Quality Monitoring and Evaluation, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, China., Hongjun G; Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Sciences, 130124, Changchun, PR China., Ping Z; Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Sciences, 130124, Changchun, PR China., Naveed M; Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad, 38040, Pakistan., Minggang X; Key Laboratory of Arable Land Quality Monitoring and Evaluation, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, China. Electronic address: xuminggang@caas.cn., Nú Nez-Delgado A; Dept. Soil Sci. and Agric. Chem., Engineering Polytech School, Campus Univ. Lugo, Univ. Santiago de Compostela, Spain.
Jazyk: angličtina
Zdroj: Environmental research [Environ Res] 2023 Jan 01; Vol. 216 (Pt 2), pp. 114626. Date of Electronic Publication: 2022 Oct 26.
DOI: 10.1016/j.envres.2022.114626
Abstrakt: Isolation and quantification of soil organic matter (SOM) pools under the influence of management practices is needed for assessing the changes in soil fertility. However, the knowledge on how the active, slow and passive pools of SOM respond to long-term fertilization is scarce. Therefore, the present study was designed to isolate the active, slow, and passive pools of soil organic matter through physical fractionation under long-term fertilization. The treatments included; inorganic fertilization (NPK) either alone or combined with a normal dose of manure (MNPK) or a high dose of manure (1.5MNPK) with an unfertilized control (CK) for comparison. The isolated pools were analyzed and compared for their sizes, SOC and TN storage and their contribution to total SOC and TN sequestration. The results revealed that the fertilization enhanced the active, slow and passive pools of SOC and TN and their storage under applied treatments was patterned as 1.5MNK > MNPK > NPK > CK. The highest SOC and TN storage was observed in the active pool, while, greater response to fertilization (in terms of response ratio) was associated with the slow pool. Results show that fertilization enhanced the proportion of SOC and TN stocks to bulk SOC and TN stocks in active and slow pools, while a diminishing trend was found for passive pools. Moreover, the highest response ratio was found for TN sequestration in each pool as compared to SOC, suggesting preferential accumulation of TN over SOC in the studied soil. Nevertheless, the highest SOC and TN storage took place in the active pool. The slow pool showed greater response to applied fertilizer, with the highest values being observed under 1.5MNPK. This study concluded that long-term manure + inorganic fertilization is crucial for enhancing C and N sequestration by altering the size and response of SOM pools.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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