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引用本文:蒋潇潇, 宁 凯, 潘复静, 杨 希, 贺新宇, 梁月明.蔗渣生物质炭对岩溶森林土壤磷素有效性的影响[J].广西植物,2025,45(6):1071-1079.[点击复制]
JIANG Xiaoxiao, NING Kai, PAN Fujing, YANG Xi, HE Xinyu, LIANG Yueming.Effect of bagasse biochar on phosphorus availability in soil of karst forest ecosystem[J].Guihaia,2025,45(6):1071-1079.[点击复制]
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蔗渣生物质炭对岩溶森林土壤磷素有效性的影响
蒋潇潇1, 宁 凯2,3, 潘复静3, 杨 希2,3, 贺新宇2,3, 梁月明2,4,5,6*
1. 广西师范大学, 广西 桂林 541004;2. 中国地质科学院岩溶地质研究所, 广西/自然资源部岩溶动力学重点实验室, 广西桂林 541004;3. 桂林理工大学 环境科学与工程学院 广西环境污染控制理论与技术重点实验室, 广西 桂林 541004;4. 桂林岩溶地质 广西野外科学观测研究站, 广西 桂林 541004;5. 联合国教科文组织国际岩溶研究中心/岩溶动力系统与全球变化国际联合 研究中心, 广西 桂林 541004;6.6. 广西平果喀斯特生态系统国家野外科学观测研究站, 广西 平果531406
摘要:
为了提高岩溶森林石灰土磷素有效性,探究蔗渣生物质炭施加对土壤磷素活化的影响。采用室内培养试验,分析4个蔗渣生物质炭浓度(0、5、10、15 t·hm-2)施加对岩溶森林石灰土磷素有效性的影响。结果表明:(1)蔗渣生物质炭添加显著提高了土壤有效磷(Olsen-P)、盐酸提取磷(HCl-P)与柠檬酸提取磷(Citrate-P)的含量,并随蔗渣生物质炭添加浓度与时间的增加呈增加趋势。(2)生物质炭添加浓度为5 t·hm-2时,土壤微生物生物量磷含量(MBP)与碱性磷酸酶(ALP)活性最高。(3)Olsen-P与HCl-P、Citrate-P存在显著正相关关系(R2=0.68; R2=0.77),而与酶提取磷(Enzyme-P)相关性不显著(R2=0.14),说明蔗渣生物质炭施入石灰土中,提高的土壤Olsen-P主要来自弱酸活化的无机磷。(4)随机森林模型分析表明,HCl-P、Citrate-P、MBP、Enzyme-P与pH是影响土壤磷素有效性的重要因子。综上认为,综合考虑与磷素有效性相关的指标,蔗渣生物质炭添加浓度为5 t·hm-2是提高岩溶森林土壤磷素有效性的最合适浓度。
关键词:  土壤磷素有效性, 磷组分, 蔗渣生物质炭, 岩溶, 森林石灰土
DOI:10.11931/guihaia.gxzw202404056
分类号:Q948.1
文章编号:1000-3142(2025)06-1071-09
基金项目:广西重点研发项目(桂科AB24010051,桂科AB22080071); 国家自然科学基金(32271730,42261011); 中国地质科学院岩溶地质研究基本科研业务费项目(CAGS2023020)。
Effect of bagasse biochar on phosphorus availability in soil of karst forest ecosystem
JIANG Xiaoxiao1, NING Kai2,3, PAN Fujing3, YANG Xi2,3, HE Xinyu2,3, LIANG Yueming2,4,5,6*
1. Guangxi Normal University, Guilin 541004, Guangxi, China;2. Institute of Karst Geology, CAGS, Key Laboratory on MNR &3.CZAR, Guilin 541004, Guangxi, China;4.3. Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, College of Environmental and Engineering, Guilin University of Technology, Guilin 541004, Guangxi, China;5.4. Guilin Karst Geology Observation and Research Station of Guangxi, Guilin 541004, Guangxi, China;6.5. International Research Centre on Karst under the Auspices of UNESCO/National Center for International Research on Karst Dynamic System and Global Change, Guilin 541004, Guangxi, China;7.6. Pingguo Guangxi, Karst Ecosystem, National Observation and Research Station, Pingguo 531406, Guangxi, China 1. Guangxi Normal University, Guilin 541004, Guangxi, China; 2. Institute of Karst Geology, CAGS, Key Laboratory on MNR & CZAR, Guilin 541004, Guangxi, China; 3. Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, College of Environmental and Engineering, Guilin University of Technology, Guilin 541004, Guangxi, China; 4. Guilin Karst Geology Observation and Research Station of Guangxi, Guilin 541004, Guangxi, China; 5. International Research Centre on Karst under the Auspices of UNESCO/National Center for International Research on Karst Dynamic System and Global Change, Guilin 541004, Guangxi, China; 6. Pingguo Guangxi, Karst Ecosystem, National Observation and Research Station, Pingguo 531406, Guangxi, China
Abstract:
In order to improve phosphorus availability in calcareous soil of karst forest ecosystem, the effect of bagasse biochar application on soil phosphorus activation was studied. The effects of four bagasse biochar concentrations(0, 5, 10 and 15 t·hm-2)on phosphorus availability in calcareous soil of karst forest were analyzed based on laboratory culture experiment. The results were as follows:(1)The contents of soil available phosphorus(Olsen-P), hydrochlori acid extraction of phosphorus(HCl-P)and citric acid extraction of phosphorus(Citrate-P)in soil were significantly increased with the addition of bagasse biochar addition concentration and time.(2)The highest of soil microbial biomass phosphorus(MBP)content and alkaline phosphatase(ALP)activity were observed in 5 t·hm-2 biochar addition concentration.(3)The content of Olsen-P was significantly positively correlated with the contents of HCl-P and Citrate-P(R2=0.68; R2=0.77), while Olsen-P content was not significantly correlated with enzyme extraction of phosphorus(Enzyme-P)(R2=0.14). The results indicated that an increasing in soil available phosphorus was mainly from inorganic phosphorus activated by weak acid when bagasse biochar was applied into calcareous soils.(4)Random forest model analysis showed that soil phosphorus availability was significantly affected by HCl-P, Citrate-P, MBP, Enzyme-P and soil pH. To sum up, these results indicate that 5 t·hm-2 bagasse biochar addition concentration is the most appropriate concentration to improve soil phosphorus availability of karst forest, considering the factors related to phosphorus availability.
Key words:  soil phosphorus availability, P fractions, bagasse biochar, karst, forest calcareous soil
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