College of Life Science, Northeast Agricultural University, Harbin 150030, China.
College of Life Science, Northeast Agricultural University, Harbin 150030, China.
Bioresour Technol. 2021 Jan;319:124121. doi: 10.1016/j.biortech.2020.124121. Epub 2020 Sep 13.
The study aimed to identify the preference of pathways of humus formation. Five lab-scale composting experiments were established: the control (CK), montmorillonite addition (M), illite addition (I), thermal treatment montmorillonite addition (M-) and thermal treatment illite addition (I-). Results showed humus content was increased by 11.5%, 39.3%, 37.2%, 30.9% and 27.6% during CK, M-, M, I- and I composting. Meanwhile, Redundancy analysis indicated the bands of bacteria community related to humic acid (HA) were more abundant in the M- and I- treatments. Furthermore, structural equation model and variance partitioning analysis demonstrated that M- and I- treatments promoted precursors to synthesize HA by coordinated regulation of biotic pathway and abiotic pathway, the increase of HA in the M and I treatments mainly through the abiotic pathway. In summary, an effective method was proposed to improve humus production by adjusting the preference of biotic and abiotic pathways of humus formation.
本研究旨在确定腐殖质形成途径的偏好。建立了五个实验室规模的堆肥实验：对照（CK）、蒙脱石添加（M）、伊利石添加（I）、热处理蒙脱石添加（M-）和热处理伊利石添加（I-）。结果表明，在 CK、M-、M、I-和 I 堆肥过程中，腐殖质含量分别增加了 11.5%、39.3%、37.2%、30.9%和 27.6%。同时，冗余分析表明，与腐殖酸（HA）相关的细菌群落带在 M-和 I-处理中更为丰富。此外，结构方程模型和方差分解分析表明，M-和 I-处理通过协调生物途径和非生物途径的调节，促进了前体物质合成 HA，而 M 和 I 处理中 HA 的增加主要通过非生物途径。总之，提出了一种通过调整腐殖质形成的生物和非生物途径偏好来提高腐殖质产量的有效方法。
