Abstract
The fragile ecosystem and unique parent material in the karst region lead to severe carbon loss and cadmium pollution. Additionally, the rice-oilseed rotation system exacerbates the accumulation of cadmium in crops. Therefore, it is necessary to find a sustainable land use approach that ensures crop quality while promoting soil carbon sequestration. This article provides an overview of cutting-edge technologies to enhance soil carbon sequestration capacity, and it discovers that the application of amendments has a significant effect on reducing cadmium content in crops and improving soil organic carbon levels. Through experimental analysis, The results indicate that the conditioner in group T4 (Humic acids) can effectively passivate cadmium elements in the soil, reducing the cadmium content in rice and rapeseed tissues. Overall, our research indicates that humic acid amendments not only enhance soil carbon sequestration capacity but also significantly reduce cadmium content in crops and increase crop yields. These findings highlight the significant value of humic acid amendments in the rice-oilseed rotation system in the karst region, providing scientific evidence and theoretical support for promoting sustainable development in the area.
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