The Interaction between the Type of Fertilizer and Soil Carbon Cycling

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Soil and Plant Nutrition".

Deadline for manuscript submissions: closed (25 February 2025) | Viewed by 4384

Special Issue Editors


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Guest Editor
Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China
Interests: soil amelioration; regulation of soil carbon and nitrogen cycle; resource utilization of agricultural waste
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Guest Editor
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
Interests: climate changes; soil C and N cycles; greenhouse gas emissions

Special Issue Information

Dear Colleagues,

Diverse types of fertilizers are affecting agricultural production. Applying fertilizers to farmland inevitably leads to changes in soil carbon turnover, which has become a hot research topic in carbon cycling.

This Special Issue aims to collect new information on cutting-edge research, such as fertilization management measures to promote soil carbon sequestration, soil carbon turnover pathways, and soil carbon conversion mechanisms under fertilizer regulation.

Specifically, this Special Issue calls for original research, review, and small-scale studies of soil improvement methods and mechanisms, including but not limited to the following: the types and application methods of agricultural fertilizers; soil carbon sequestration and carbon stimulation effects; soil carbon cycling processes; soil carbon emissions and the balance of income and expenditure; and the biological mechanisms of soil carbon transformation.

Dr. Xuebo Zheng
Dr. Longlong Xia
Guest Editors

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Keywords

  • fertilizer types
  • soil carbon
  • carbon sequestration and carbon stimulation
  • agricultural production

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Published Papers (2 papers)

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Research

15 pages, 2947 KiB  
Article
Straw Return or No Tillage? Comprehensive Meta-Analysis Based on Soil Organic Carbon Contents, Carbon Emissions, and Crop Yields in China
by Yanfei Yan, Haoyu Li, Min Zhang, Xiwei Liu, Lingxin Zhang, Yaokuo Wang, Min Yang and Ruiguo Cai
Agronomy 2024, 14(10), 2263; https://doi.org/10.3390/agronomy14102263 - 1 Oct 2024
Cited by 2 | Viewed by 1725
Abstract
Conservation tillage methods, including straw return (SR) and no tillage (NT), are widely used to improve the soil organic carbon (SOC) content and crop yield. However, applying SR or NT separately has become a common practice for farmers producing different crops or those [...] Read more.
Conservation tillage methods, including straw return (SR) and no tillage (NT), are widely used to improve the soil organic carbon (SOC) content and crop yield. However, applying SR or NT separately has become a common practice for farmers producing different crops or those in different regions. Evaluating the effects of SR or NT on the SOC content, carbon emissions, and crop yield are important for guiding the correct application of conservation tillage and promoting sustainable agricultural development. Therefore, we conducted a meta-analysis based on 1014 sets of data obtained in China to assess the effects of SR and NT on the SOC content, carbon emissions, and crop yield. Compared with no straw return, SR increased the SOC content and crop yield by 10% and 8.6%, respectively, but with no significant impact on carbon emissions. Compared with conventional tillage, NT increased the SOC content by 2.9% and reduced the carbon emissions and crop yield by 18% and 3.9%, respectively. We also found that SR combined with NT had an additive effect, where the combination improved SOC more than applying SR or NT alone. If applying SR or NT alone, the specific climatic conditions, soil characteristics, and field management strategies need to be considered to maximize SOC. In particular, SR should be used in limited hydrothermal conditions (low temperature or low precipitation) and areas where rice–wheat rotation is implemented. NT can be used under any climate conditions, but it can effectively increase the SOC content in continuous wheat cropping areas. Full article
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15 pages, 4907 KiB  
Article
Biochar and Straw Amendments over a Decade Divergently Alter Soil Organic Carbon Accumulation Pathways
by Kunjia Lei, Wenxia Dai, Jing Wang, Zhenwang Li, Yi Cheng, Yuji Jiang, Weiqin Yin, Xiaozhi Wang, Xiaodong Song and Quan Tang
Agronomy 2024, 14(9), 2176; https://doi.org/10.3390/agronomy14092176 - 23 Sep 2024
Cited by 5 | Viewed by 1971
Abstract
Exogenous organic carbon (C) inputs and their subsequent microbial and mineral transformation affect the accumulation process of soil organic C (SOC) pool. Nevertheless, knowledge gaps exist on how different long-term forms of crop straw incorporation (direct straw return or pyrolyzed to biochar) modifies [...] Read more.
Exogenous organic carbon (C) inputs and their subsequent microbial and mineral transformation affect the accumulation process of soil organic C (SOC) pool. Nevertheless, knowledge gaps exist on how different long-term forms of crop straw incorporation (direct straw return or pyrolyzed to biochar) modifies SOC composition and stabilization. This study investigated, in a 13-year long-term field experiment, the functional fractions and composition of SOC and the protection of organic C by iron (Fe) oxide minerals in soils amended with straw or biochar. Under the equal C input, SOC accumulation was enhanced with both direct straw return (by 43%) and biochar incorporation (by 85%) compared to non-amended conventional fertilization, but by different pathways. Biochar had greater efficiency in increasing SOC through stable exogenous C inputs and inhibition of soil respiration. Moreover, biochar-amended soils contained 5.0-fold greater SOCs in particulate organic matter (POM) and 1.2-fold more in mineral-associated organic matter (MAOM) relative to conventionally fertilized soils. Comparatively, although the magnitude of the effect was smaller, straw-derived OC was preserved preferentially the most in the MAOM. Straw incorporation increased the soil nutrient content and stimulated the microbial activity, resulting in greater increases in microbial necromass C accumulation in POM and MAOM (by 117% and 43%, respectively) compared to biochar (by 72% and 18%). Moreover, straw incorporation promoted poorly crystalline (Feo) and organically complexed (Fep) Fe oxides accumulation, and both were significantly and positively correlated with MAOM and SOC. The results address the decadal-scale effects of biochar and straw application on the formation of the stable organic C pool in soil, and understanding the causal mechanisms can allow field practices to maximize SOC content. These results are of great implications for better predicting and accurately controlling the response of SOC pools in agroecosystems to future changes and disturbances and for maintaining regional C balance. Full article
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