Plant Adaptability to Improved Dredged Sediment

Shoulong Zhang, Rixiong Mo, Haorong Shi, Yuanzhen Li, Yaoyao Zhou, Chenhao Wang and Guanlong Yu ()
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Shoulong Zhang: Guangxi Pinglu Canal Construction Co., Ltd., Nanning 530104, China
Rixiong Mo: CCCC Guangzhou Dredging Co., Ltd., Guangzhou 524557, China
Haorong Shi: School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410114, China
Yuanzhen Li: CCCC Guangzhou Dredging Co., Ltd., Guangzhou 524557, China
Yaoyao Zhou: CCCC Guangzhou Dredging Co., Ltd., Guangzhou 524557, China
Chenhao Wang: School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410114, China
Guanlong Yu: School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410114, China

Agriculture, 2025, vol. 15, issue 2, 1-14

Abstract: Traditional dredged sludge disposal methods are characterized by low resource utilization and high carbon emissions, leading to serious environmental pollution. This study used dredged sludge, composted pig manure, and sawdust as raw materials, and supplemented them with composite biological agents to prepare improved soil. Plant adaptability to the improved soil was comprehensively evaluated using factors such as seed germination index (GI). The alkaline nitrogen content in the improved soil increased by 78.61% compared to the dredged sludge, and the content of other nutrients such as available potassium also increased to varying degrees. Ryegrass seed GI increased by 51.06% in improved soil (IS1) compared to dredged sludge. The main dominant fungi in the improved soil (IS1) were Tausonia , Trichoderma , and Cystoflobasidium , which promote soil nutrient activation and antagonize pathogenic bacteria, making the environment more conducive to plant growth. Dredged sludge was successfully converted into planting soil. Fully utilizing the nitrogen, phosphorus, and other substances enriched in dredged sludge to provide nutrients for plant growth is an efficient method to achieve dredged sludge resource utilization.

Keywords: planting soil; dredged sludge; microbial diversity; germination index; plants (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2025
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