Mikania micrantha Kunth and its derived biochar impacts on heavy metal bioavailability and siderophore-related genes during chicken manure composting
Yousif Abdelrahman Yousif Abdellah,
Hong-Yu Chen,
Shi-Wen Deng,
Wan-Ting Li,
Rong-Jie Ren,
Xi Yang,
Muhammad Shoaib Rana,
Shan-Shan Sun,
Jia-Jie Liu,
Rui-Long Wang
Affiliations
Yousif Abdelrahman Yousif Abdellah
Guangdong Engineering Technology Research Centre of Modern Eco-Agriculture and Circular Agriculture, Department of Ecology, College of Natural Resources and Environment, South China Agricultural University
Hong-Yu Chen
Guangdong Engineering Technology Research Centre of Modern Eco-Agriculture and Circular Agriculture, Department of Ecology, College of Natural Resources and Environment, South China Agricultural University
Shi-Wen Deng
Guangdong Engineering Technology Research Centre of Modern Eco-Agriculture and Circular Agriculture, Department of Ecology, College of Natural Resources and Environment, South China Agricultural University
Wan-Ting Li
Guangdong Engineering Technology Research Centre of Modern Eco-Agriculture and Circular Agriculture, Department of Ecology, College of Natural Resources and Environment, South China Agricultural University
Rong-Jie Ren
Guangdong Engineering Technology Research Centre of Modern Eco-Agriculture and Circular Agriculture, Department of Ecology, College of Natural Resources and Environment, South China Agricultural University
Xi Yang
Guangdong Engineering Technology Research Centre of Modern Eco-Agriculture and Circular Agriculture, Department of Ecology, College of Natural Resources and Environment, South China Agricultural University
Muhammad Shoaib Rana
Guangdong Engineering Technology Research Centre of Modern Eco-Agriculture and Circular Agriculture, Department of Ecology, College of Natural Resources and Environment, South China Agricultural University
Shan-Shan Sun
Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education and Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region and Key Laboratory of Microbiology, College of Heilongjiang Province and School of Life Sciences, Heilongjiang University
Jia-Jie Liu
Guangdong Engineering Technology Research Centre of Modern Eco-Agriculture and Circular Agriculture, Department of Ecology, College of Natural Resources and Environment, South China Agricultural University
Rui-Long Wang
Guangdong Engineering Technology Research Centre of Modern Eco-Agriculture and Circular Agriculture, Department of Ecology, College of Natural Resources and Environment, South China Agricultural University
Abstract Biochar can potentially reduce heavy metals (HMs) mobility and bioavailability during composting. However, siderophores secreted by functional microbes might lead to the re-mobilization of metals like Cu and Zn. Therefore, this study intended to explore the impacts of Mikania micrantha Kunth (MM) and MM-derived biochar (MMB) in the reduction of Cu and Zn bioavailability, and siderophore-related gene abundances during composting. Compared with MM and corn straw (CS) composts, a significant decline was noticed in the extractable and reducible Cu [(2.3 mg kg−1 + 12.1 mg kg−1), and (3.3 mg kg−1 + 14.6 mg kg−1)], and Zn [(103.1 mg kg−1 + 110.1 mg kg−1), and (109.6 mg kg−1 + 117.2 mg kg−1)] in MMB and corn straw biochar (CSB) composts, respectively. Besides, the lowest relative abundance of HMs-resistant bacteria particularly Corynebacterium (0.40%), Pseudomonas (0.46%), and Enterobacter (0.47%), was noted in MMB compost. Also, a significant increase in sesquiterpenoid and triterpenoid biosynthesis abundance (5.77%) accompanied by a reduction in the abundance of clusters related to siderophore transport, and siderophore transmembrane transporter activity was detected in MMB compost. Multivariate analysis labeled temperature, moisture content, total organic carbon, Corynebacterium, and Bacillus as the primary factors significantly correlated with the Cu and Zn bioavailability (− 0.90 ≤ r ≤ 0.90, P < 0.05). The structural equation model revealed that physicochemical parameters, microbial abundance, and siderophores exert a substantial influence on Cu and Zn bioavailability. Accordingly, MM and its derived biochar are recommended as an effective approach for accelerating Cu and Zn bioavailability reduction and managing the growth and distribution of invasive plants. Graphical Abstract
