Effect of initial moisture content, resulting from different ratios of vegetable waste to maize straw, on compost was mediated by composting temperatures and microbial communities at low temperatures. - 2024
Effect of initial moisture content, resulting from different ratios of vegetable waste to maize straw, on compost was mediated by composting temperatures and microbial communities at low temperatures.
Effect of initial moisture content, resulting from different ratios of vegetable waste to maize straw, on compost was mediated by composting temperatures and microbial communities at low temperatures.pdf
[en] Owing to the huge amounts and perishable character of vegetable wastes, composting is one of the best options for recycling vegetable wastes post-harvest. The initial moisture content (MC) is critical for optimizing composting process, but the effect of high MC in undehydrated vegetable wastes on composting was rarely reported. For this, the plant-scale windrows were prepared by mixing cauliflower waste and maize straw at different ratios to control initial MC of 70 % (T1-70) and 80 % (T2-80), respectively, and composted in winter. As composting progressed, substantial organic matter degradation, progressive humification, decreases in electrical conductivity and increases of pH and germination index (GI) were observed in both treatments. Nonetheless, T1-70 accelerated heating rate early during composting, prolonged high temperature period (>50 °C) by 30 d, thus increased the harmless level of composting, and significantly improved the humification of end-products compared to T2-80. Results also revealed that T1-70 activated more indigenous microbes and enhanced microbial interactions early during composting, with the fungi enriched in T1-70 playing an important role in accelerating the composting process. Remarkably, the difference in composting temperatures, humification degree, and microbial communities between the two treatments was most significant during the maturation phase. In this phase, MWH_CFBk5, Planktosalinus, Pseudopedobacter, and Luteimonas enriched in T1-70 were positively correlated with humification indices. It is suggested that the effect of initial MC, resulting from different ratios of vegetable waste to maize straw, on their composting was mediated by the composting temperature and microbial communities at low temperatures.
Disciplines :
Agriculture & agronomy Microbiology Biotechnology
Author, co-author :
Sun, Shanshan ; Department of Microbiology, College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
Guo, Cheng; Department of Microbiology, College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
Wang, Jianyu; Department of Microbiology, College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
Ren, Li; College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
Qu, Jianping ; Université de Liège - ULiège > TERRA Research Centre > Entomologie, Phytopathologie et Productions Innovantes (EPPI) ; Department of Microbiology, College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
Guan, Qi; Department of Microbiology, College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
Dou, Nongxiao; Department of Microbiology, College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
Zhang, Jiahui ; Department of Microbiology, College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
Chen, Qiuhua; Department of Microbiology, College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
Wang, Qi; Department of Microbiology, College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China
Wang, Jiguang; Shandong Future Biotechnology Co., Ltd, China
Li, Jieming; College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China. Electronic address: lijieming@cau.edu.cn
Gao, Zheng; Department of Microbiology, College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China, State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China. Electronic address: gaozheng@sdau.edu
Zhou, Bo; Department of Microbiology, College of Life Sciences, Shandong Agricultural University, Tai'an, 271018, China, National Engineering Research Center for Efficient Utilization of Soil and Fertilizer, Tai'an, 271018, China. Electronic address: zhoubo2798@163.com
Effect of initial moisture content, resulting from different ratios of vegetable waste to maize straw, on compost was mediated by composting temperatures and microbial communities at low temperatures.
The work was funded by the Key Research and Development Project of Shandong Province ( 2020CXGC010803 ), Major Applied Agricultural Technology Innovation Projects of Shandong Province ( SD2019ZZ009 ), Key Research and Development Project of Ningxia Hui Autonomous Region ( 2021BBF02006 ), and National Key Technologies Research and Development Program of China ( 2017YFD0800200 ).
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