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- Title
凹凸棒土添加对结球甘蓝废弃物堆肥腐殖化过程的影响.
- Authors
朱义娟; 肖红琳; 刘洋廷; 朱康文; 杨志敏; 杨红军; 陈玉成
- Abstract
This study aimed to elucidate that the addition of attapulgite promotes the humification of cabbage waste compost. Cabbage waste and corn straw were used as raw materials in this study, and attapulgite with mass fractions of 0 (CK), 2.5% (T1), 5% (T2), and 7.5% (T3) were added to the raw materials for aerobic composting to investigate the effects on their basic physicochemical properties, organic matter components, and humification. Correlation analysis and structural equation model (SEM) were used to explore the mechanism behind the humification process. The results showed that the high temperature period of the compost was prolonged by 1–3 days with the addition of attapulgite. Seed germination index increased by 27.97% and 42.06% with better maturity and organic matter degradation rate increased by 1.67% and 6.92% in the T2 and T3 treatments, respectively, compared with CK. In addition, compared with that in the initial state, the content of fulvic acid (FA) in CK, T1, T2, and T3 decreased by 39.88%, 42.92%, 47.28%, and 47.68%, respectively, at the end of composting. However, the content of humic acid (HA) increased by 89.08%, 129.78%, 135.83%, and 162.50%, respectively, at the end of composting, which increased the aromaticity of the pile. The results of correlation analysis and SEM demonstrated that the addition of attapulgite caused a positive and negative shift in the correlation between dissolved organic carbon (DOC) and humic fractions and precursors, indicating that it promoted the synthesis of HA by affecting DOC. Simultaneously, it also increased the pathways that significantly affected the formation of HA, promoting the conversion of amino acid, reducing sugar, and FA to HA, thus enhancing the degree of humification. This study demonstrated that the addition of attapulgite at 7.5% can significantly promote the composting of cabbage waste, effectively activate precursors, and improve the aromaticity and humification of humus.
- Subjects
DISSOLVED organic matter; HUMIC acid; STRUCTURAL equation modeling; CORN straw; HUMIFICATION; FULLER'S earth; WHEAT straw; CABBAGE
- Publication
Journal of Agro-Environment Science, 2023, Vol 42, Issue 9, p2130
- ISSN
1672-2043
- Publication type
Article
- DOI
10.11654/jaes.2023-0299