Abstract：
This study investigated the impact of adding enzyme inducer (MnSO4) on humic substance (HS) formation during straw composting. The results demonstrated that both enzyme inducer treatment group (Mn) and functional microorganism treatment group (F) led to an increase in the content of HS compared to the treatment group without enzyme inducer and functional microorganism (CK). Interestingly, the enzyme inducer exhibited a higher promoting effect on HS (57.80 % ~ 58.58 %) than functional microbial (46.54 %). This was because enzyme inducer stimulated the growth of key microorganisms and changed the interaction relationship between microorganisms. The structural equation model suggested that the enzyme inducer promoted the utilization of amino acids by the fungus and facilitated the conversion of precursors to humic substance components. These findings provided a direction for improving the quality of composting products from agricultural straw waste. It also provided theoretical support for adding MnSO4 to compost.
摘要：
本研究研究了在秸秆堆肥过程中添加酶诱导剂（MnSO4）对腐殖质（HS）形成的影响。结果表明，与不含酶诱导剂和功能微生物（CK）的处理组相比，酶诱导剂处理组（Mn）和功能微生物处理组（F）均导致HS含量增加。有趣的是,酶诱导剂对HS的促进作用（57.80％〜58.58％）高于功能微生物（46.54％）。这是因为酶诱导剂刺激了关键微生物的生长，改变了微生物之间的相互作用关系。结构方程模型表明，酶诱导剂促进了真菌对氨基酸的利用，并促进了前体向腐殖质成分的转化。这些发现为提高农业秸秆废弃物堆肥产品的质量提供了方向。这也为在堆肥中添加MnSO4提供了理论支持。
