在亚热带毛竹林中，通过 phoD-厌氧菌的调解，生物炭在提高土壤生物磷方面比秸秆具有持续优势

IF 3.7 2区农林科学 Q1 FORESTRY

Forest Ecology and Management Pub Date : 2025-03-02 DOI:10.1016/j.foreco.2025.122606

Zhenhui Jiang , Tony Vancov , Yunying Fang , Caixian Tang , Wenyi Zhang , Mouliang Xiao , Xinzhang Song , Jiashu Zhou , Tida Ge , Yanjiang Cai , Bing Yu , Jason C. White , Yongfu Li

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引用次数: 0

摘要

秸秆和生物炭是提高亚热带毛竹林土壤有机碳库和改善土壤质量的常用手段。然而，它们对土壤生物磷(P)的影响尚不清楚，尽管磷限制在这些森林中很常见。本研究通过为期两年的试验，在毛索竹林中进行了对照、秸秆和添加生物炭三种处理，研究了这些改进剂对土壤生物磷的影响。在处理后3、12和24个月，我们测量了土壤生物磷组分，包括酶、柠檬酸盐、CaCl2和盐酸可提取的磷，以及碱性磷酸酶的活性，以及携带磷的细菌的丰度和群落结构。结果表明，秸秆和生物炭分别提高了7.0 ~ 134.6 %和14.4 ~ 157.7 %的4个生物磷组分。秸秆的添加导致4个生物- p组分的第一主成分（生物- ppc1，代表所有组分的复合指数）的快速增加，最初增加了291.8 %。然而，这种效果随着时间的推移而下降，12个月时下降113.3% %，24个月时下降25.0% %。相比之下，生物炭导致生物- ppc1的持续改善，在两年内增加了157.3 %至184.6 %。结果表明，含磷细菌丰度与生物- ppc1呈正相关，phoD丰度与碱性磷酸酶活性呈正相关，表明这些细菌是调控生物- p的关键。此外，优势的含磷细菌属（如慢根瘤菌、铜菌和假单胞菌）主要控制生物磷的调节，而不是罕见的属。总的来说，本研究强调了秸秆和生物炭作为有机改进剂增强土壤生物磷动力学的潜力。生物炭显示出长期改善土壤生物磷的希望。这些发现有助于我们对土壤养分动态的理解，并为摩梭竹林的可持续管理实践提供信息。

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Sustained superiority of biochar over straw for enhancing soil biological-phosphorus via the mediation of phoD-harboring bacteria in subtropical Moso bamboo forests

Straw and biochar are commonly used to enhance soil organic carbon pools and improve soil quality in subtropical Moso bamboo forests. However, their effects on soil biological-phosphorus (P) remain unclear, even though P limitation is common in these forests. This study investigates the impact of these amendments on soil biological-P through a two-year trial with three treatments: control, straw, and biochar addition in a Moso bamboo forest. We measured soil biological-P fractions, including enzyme-, citrate-, CaCl₂-, and HCl-extractable P, along with the activities of alkaline phosphatase, and the abundance and community structures of phoD-harboring bacteria at 3, 12, and 24 months post-treatment. Results showed that both straw and biochar increased the four biological-P fractions by 7.0–134.6 % and 14.4–157.7 %, respectively. Straw addition resulted in a rapid increase in the first principal component of the four biological-P fractions (biological-P_PC1, which represented a composite index of all fractions), with a 291.8 % enhancement initially. However, this effect declined over time, showing a decrease of 113.3 % at 12 months and 25.0 % at 24 months. In contrast, biochar led to a sustained improvement in the biological-P_PC1, with increases ranging from 157.3 % to 184.6 % over the two-year period. Positive correlations were found between the abundance of phoD-harboring bacteria and biological-P_PC1, as well as between phoD abundance and alkaline phosphatase activity, indicating that these bacteria are key in regulating biological-P. Furthermore, dominant phoD-harboring bacterial genera (e.g., Bradyrhizobium, Cupriavidus, and Pseudomonas) primarily governed the regulation of biological-P, rather than rare genera. Overall, this study highlights the potential of straw and biochar as organic amendments for enhancing soil biological-P dynamics. Biochar shows promise for long-term improvements in soil biological-P. These findings contribute to our understanding of soil nutrient dynamics and inform sustainable management practices in Moso bamboo forests.

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来源期刊

Forest Ecology and Management 农林科学-林学

CiteScore

7.50

自引率

10.80%

发文量

665

审稿时长

39 days

期刊介绍： Forest Ecology and Management publishes scientific articles linking forest ecology with forest management, focusing on the application of biological, ecological and social knowledge to the management and conservation of plantations and natural forests. The scope of the journal includes all forest ecosystems of the world. A peer-review process ensures the quality and international interest of the manuscripts accepted for publication. The journal encourages communication between scientists in disparate fields who share a common interest in ecology and forest management, bridging the gap between research workers and forest managers. We encourage submission of papers that will have the strongest interest and value to the Journal''s international readership. Some key features of papers with strong interest include: 1. Clear connections between the ecology and management of forests; 2. Novel ideas or approaches to important challenges in forest ecology and management; 3. Studies that address a population of interest beyond the scale of single research sites, Three key points in the design of forest experiments, Forest Ecology and Management 255 (2008) 2022-2023); 4. Review Articles on timely, important topics. Authors are welcome to contact one of the editors to discuss the suitability of a potential review manuscript. The Journal encourages proposals for special issues examining important areas of forest ecology and management. Potential guest editors should contact any of the Editors to begin discussions about topics, potential papers, and other details.