ORIGINAL RESEARCH
Exploration of Soil Carbon Sequestration in Relation to C:N:P:S Stoichiometry under Dynamic Cropping Systems
 
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1
Land Resources Research Institute, National Agriculture Research Center (NARC), 45500, Islamabad, Pakistan
 
2
Institute of Soil and Environmental Sciences, Pir Mehr Ali Shah Arid Agriculture University, Rawapindi, Pakistan
 
3
Depatment of Plant Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, 45320, Islamabad, Pakistan
 
4
Department of Zoology, College of Science, King Saud university, Riyadh 11451, Saudi Arabia
 
5
Department of Life Sciences, Yeungnam University, Gyeongsan 38541, Republic of Korea
 
 
Submission date: 2024-08-06
 
 
Final revision date: 2024-09-20
 
 
Acceptance date: 2024-11-16
 
 
Online publication date: 2024-12-18
 
 
Corresponding author
Qaiser Hussain   

Institute of Soil and Environmental Sciences, Pir Mehr Ali Shah Arid Agriculture University, Rawapindi, Pakistan
 
 
Wajid Zaman   

Department of Life Sciences, Yeungnam University, Gyeongsan 38541, Republic of Korea
 
 
 
KEYWORDS
TOPICS
ABSTRACT
Climate change impacts soil carbon storage by increasing temperatures, which accelerate organic matter decomposition and reduce soil carbon retention. Elevated temperatures and extreme weather events affect organic matter stability and carbon storage by disrupting C:N:P balance. Soil carbon storage is dependent on nitrogen, phosphorus, and sulfur, which help its stabilization in soil. However, there is limited information on how C:N:P:S stoichiometry affects soil carbon storage under prevailing climatic scenarios in different cropping systems. To address this gap, a two-year field experiment was conducted at the National Agricultural Research Centre in Islamabad. The study investigated maize-wheat (cereal-cereal) and fallow-wheat (fallow-cereal) cropping systems. Results showed that the highest concentrations of soil organic carbon (SOC), carbon fractions, and available nitrogen, phosphorus, and sulfur were found in the optimum humification treatment (based on 30% of humus C:N:P:S stoichiometry) for both cropping systems. This treatment resulted in an 8% increase in maize yield under the maize-wheat system and a 13-17% increase in wheat grain yield compared to the recommended dose treatment in both systems. Additionally, soil organic carbon sequestration increased by 34-36% in the maize-wheat system and 27-33% in the fallow-wheat system under the optimum humification treatment compared to sole straw incorporation. The study concludes that optimal humification practices enhance soil carbon storage by increasing microbial activity through higher organic matter inputs, thereby boosting the agricultural productivity of major cropping systems in Punjab, Pakistan.
CONFLICT OF 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.
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