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| Distribution characteristics and environmental drivers of soil organic carbon in EOD-pastoral complex |
| Received:March 19, 2025 |
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| KeyWord:pastoral complex;soil organic carbon;soil carbon storage;soil carbon sink |
| Author Name | Affiliation | E-mail | | SU Hangying | College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai 201306, China | | | LI Xinyang | No. 1 High School Affiliated to Tongji University, Shanghai 200438, China | | | WANG Qian | College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai 201306, China | q_wang@shou.edu.cn | | LI Juanying | College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai 201306, China
Shanghai Engineering Research of River and Lake Biochain Construction and Resource Utilization, Shanghai 201702, China | | | HE Wenhui | College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai 201306, China
Shanghai Engineering Research of River and Lake Biochain Construction and Resource Utilization, Shanghai 201702, China | |
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| Abstract: |
| This study methodologically examines the distribution patterns of carbon stock per unit area（DSOC）, labile organic carbon（LOC）, recalcitrant organic carbon（ROC）, dissolved organic carbon（DOC）, and microbial biomass carbon（MBC）across distinct land-use types within an ecologically oriented development（EOD）- based agricultural complex in Fengjing, Jinshan District, Shanghai. Furthermore, critical environmental drivers influencing soil organic carbon content and sequestration capacity across differentiated agricultural land-use types are systematically characterized. The results indicated that DSOC was highest in rice-shrimp co-cropping soils（non-growing season： 55.63 t·hm-2; growing season：63.46 t·hm-2）, the contents of soil organic carbon fractions（LOC, ROC, DOC, and MBC）exhibited consistent variation trends with DSOC. DSOC demonstrated a significant positive correlation with total nitrogen. Total nitrogen was identified as the primary driver governing DSOC spatial distribution. The investigation ultimately quantified soil carbon sinks in the pastoral complexes. Total carbon sink estimated at 299.21 t·a-1. Among predominant agricultural land use types, higher carbon sinks were found in rice and shrimp co-cropping soils（7.83 t· hm-2· a-1）, tree planting soils in stereoscopic agricultural areas（7.59 t· hm-2· a-1）, and purified water aquaculture（7.02 t·hm-2·a-1）. Therefore, carbon-neutral development pathways in EOD-oriented pastoral complexes could be strategically optimized through precision differentiation of cultivation practices, including integrated rice-shrimp farming, stereoscopic agricultural, and purified water aquaculture, along with the implementation of straw incorporation, and submerged vegetation cultivation. These methodologies systematically promote carbon-neutral development in the pastoral complex. |
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