College of Life Science, Northeast Agricultural University, Harbin 150030, China.
Heilongjiang Province Environmental Monitoring Centre, Harbin 150056, China.
Bioresour Technol. 2022 Sep;360:127579. doi: 10.1016/j.biortech.2022.127579. Epub 2022 Jul 4.
Metabolites of shikimic acid (SA) pathway can be used as humic substance (HS) precursors. Due to the complexity of SA anabolism, there were few studies on SA pathway during composting. The aim of this study was to identify the key drivers of SA pathway during different materials composting. During composting, the SA, protocatechuic acid (PA) and gallic acid (GA) decreased by 57.09%, 72.27% and 54.04% on average, respectively. The structural equation model showed that SA had key driving factors (organic matter and pH) during lawn waste composting. In addition, the complexity of material structure was the main factor affecting PA driving factors. The factors and degree of influence on GA varied with different materials. Accordingly, this study provided theoretical support for the improvement of SA metabolic intensity by single material and mixed material composting, and further provided a new direction for future HS research.
莽草酸（SA）代谢物可用作腐殖质（HS）前体。由于 SA 合成代谢的复杂性，在堆肥过程中对 SA 途径的研究较少。本研究旨在确定不同物料堆肥过程中 SA 途径的关键驱动因素。在堆肥过程中，SA、原儿茶酸（PA）和没食子酸（GA）平均分别减少了 57.09%、72.27%和 54.04%。结构方程模型表明，在草坪废物堆肥过程中，SA 有关键的驱动因素（有机质和 pH 值）。此外，材料结构的复杂性是影响 PA 驱动因素的主要因素。GA 的影响因素和程度随不同材料而变化。因此，本研究为通过单一材料和混合材料堆肥提高 SA 代谢强度提供了理论支持，并为未来 HS 研究提供了新的方向。
