Short-term hydrothermal fermentation amendments enhance labile organic carbon in deep soil: Synergistic effects of organic carbon, enzymes, and microbes

IF 6.7 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation Pub Date : 2025-07-02 DOI:10.1016/j.eti.2025.104348

Jiaqi Hou , Chengze Yu , Meiying Ye , Zhiying Guo , Yanjun Xin , Fanhua Meng , Wenbing Tan , Beidou Xi , Mingxiao Li

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引用次数: 0

Abstract

Organic conditioners, like food waste derived from short-time hydrothermal fermentation (SHF), enhance soil fertility by providing accessible organic carbon for microbial growth. However, the effects of SHF on labile organic carbon (LOC) in deep soils and its linkage with microbial indicators remain poorly understood. This study examined how SHF affects bacterial community structure, enzyme activities, and active carbon in various soil layers. After a three-year field application, SHF significantly increased dissolved organic carbon (DOC), microbial biomass carbon (MBC) and LOC, especially a 244.4 % LOC increase in the 30–40 cm layer. SHF also significantly boosted α-galactosidase, β-glucosidase, and urease activities in the plow layer. Indicator species such as Ktedonobacter and Sphaerobacter, which aid in cellulose degradation and nitrogen fixation, thrived with SHF. Compared to chemical fertilizer, SHF enhanced microbial function and deep-soil fertility. Adding phosphorus and nitrogen or enhancing microbial biomass carbon and LOC could further boost these beneficial species and soil nutrients. Accordingly, SHF shows great potential as a sustainable soil conditioner for deep-rooted crops, facilitating the dual benefits of effective food waste recycling and enhanced soil quality.

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短期热液发酵修正提高深层土壤中活性有机碳：有机碳、酶和微生物的协同效应

有机调理剂，如来自短时间热液发酵（SHF）的食物垃圾，通过为微生物生长提供可接近的有机碳来提高土壤肥力。然而，对深埋土壤中挥发性有机碳（LOC）的影响及其与微生物指标的联系仍知之甚少。本研究考察了土壤水分对不同土层细菌群落结构、酶活性和活性碳的影响。经过3年的田间施用，SHF显著提高了土壤溶解有机碳（DOC）、微生物生物量碳（MBC）和LOC，其中30 ~ 40 cm层LOC增加了244.4 %。耕层中α-半乳糖苷酶、β-葡萄糖苷酶和脲酶活性显著提高。指示种，如Ktedonobacter和Sphaerobacter，有助于纤维素降解和固氮，在SHF下茁壮成长。与化肥相比，深埋肥能增强微生物功能和深层土壤肥力。添加磷和氮或增加微生物生物量碳和LOC可以进一步增加这些有益物种和土壤养分。因此，SHF作为深根作物的可持续土壤调理剂具有很大的潜力，可以实现有效回收食物垃圾和提高土壤质量的双重效益。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Environmental Technology & Innovation Environmental Science-General Environmental Science

CiteScore

14.00

自引率

4.20%

发文量

435

审稿时长

74 days

期刊介绍： Environmental Technology & Innovation adopts a challenge-oriented approach to solutions by integrating natural sciences to promote a sustainable future. The journal aims to foster the creation and development of innovative products, technologies, and ideas that enhance the environment, with impacts across soil, air, water, and food in rural and urban areas. As a platform for disseminating scientific evidence for environmental protection and sustainable development, the journal emphasizes fundamental science, methodologies, tools, techniques, and policy considerations. It emphasizes the importance of science and technology in environmental benefits, including smarter, cleaner technologies for environmental protection, more efficient resource processing methods, and the evidence supporting their effectiveness.