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生物炭施用对桂北桉树人工林土壤酶活性的影响 |
牟芝熠1,5, 段春燕2, 黎彦余3, 张德楠4, 孙英杰4, 滕秋梅4,
陈运霜1,5, 曹 杨1,5, 王紫卉6, 徐广平4,5*
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1. 广西漓江流域景观资源保育与可持续利用重点实验室, 广西师范大学, 广西 桂林 541006;2. 山西中信绿洲环保科技有限公司,
太原 030000;3. 广西壮族自治区国有黄冕林场, 广西 鹿寨 545600;4. 广西喀斯特植物保育与恢复生态学重点实验室,
广西壮族自治区
中国科学院 广西植物研究所, 广西 桂林 541006;5. 广西师范大学 生命科学学院,
广西 桂林 541006;6.6. 桂林理工大学 环境科学与工程学院, 广西 桂林 541006
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摘要: |
为探究土壤酶活性对生物炭输入的响应特征,以及为合理应用桉树枝条生物炭提供理论参考,该研究基于桂北桉树人工林田间试验,以桉树人工林采伐剩余物枝条为原料,在500 ℃条件下厌氧制备生物炭,施用质量分数分别为 0(CK)、0.5%(T1)、1%(T2)、2%(T3)、4%(T4)和 6%(T5)的桉树枝条生物炭,输入1 a 后,分析了不同处理下土壤酶活性的变化特征。结果表明:(1)沿着土层垂直深度,土壤酶含量减小。(2)各土层脲酶、过氧化氢酶、β-葡萄糖苷酶和脱氢酶的含量随生物炭施用量的增加而增大,在生物炭施用量为6%时含量最高。(3)酸性磷酸酶、蔗糖酶、亮氨酸氨基肽酶和纤维二糖苷酶的含量随着生物炭施用量的增加呈现先增加后减少的趋势,其中酸性磷酸酶和亮氨酸氨基肽酶在生物炭施用量为2%时含量最高,蔗糖酶和纤维二糖苷酶则在生物炭施用量4%时含量最高。总体上,桉树枝条生物炭施用不同程度地提高了桉树人工林的土壤酶活性。该研究结果可为林业废弃物制备生物炭资源化利用途径及其在桉树人工林的应用提供科学依据。 |
关键词: 生物炭, 土壤酶活性, 桉树人工林, 桂北, 田间试验 |
DOI:10.11931/guihaia.gxzw202110028 |
分类号:Q948 |
文章编号:1000-3142(2023)05-0880-10 |
Fund project:国家自然科学基金(42267007,31760162); 广西自然科学基金(2018GXNSFAA050069,2020GXNSFBA297048); 广西岩溶动力学重大科技创新基地开放课题(KDL & Guangxi 202004); 广西喀斯特植物保育与恢复生态学重点实验室基金(19-050-6, 19-185-7, 22-035-26); 广西科学院基本科研业务费项目(CQZ-E-1912); 广西植物研究所学科发展基金项目(001, 006); 广西重点研发计划项目(AB21220057); 广西漓江流域景观资源保育与可持续利用重点实验室研究基金(LRCSU21K0203)。 |
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Effects of biochar application on soil enzyme activities in Eucalyptus plantations in North Guangxi |
MOU Zhiyi1,5, DUAN Chunyan2, LI Yanyu3, ZHANG Denan4, SUN Yingjie4, TENG Qiumei4,
CHEN Yunshuang1,5, CAO Yang1,5, WANG Zihui6, XU Guangping4,5*
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1. Guangxi Key Laboratory of Landscape Resources Conservation and Sustainable Utilization in Lijiang River Basin, Guangxi Normal University,
Guilin 541006, Guangxi, China;2. Oasis Environmental Protection Technology Limited Company of Shanxi Zhongxin, Taiyuan 030000, China;3. Huangmian Forestry Centre of Guangxi Zhuang Autonomous Region, Luzhai 545600, Guangxi, China;4. Guangxi Key Laboratory of Plant
Conservation and Restoration Ecology in Karst Terrain, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy
of Sciences, Guilin 541006, Guangxi, China;5. College of Life Sciences, Guangxi Normal University, Guilin 541006, Guangxi, China;6.6. College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, Guangxi, China
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Abstract: |
To investigate the effects of different biochar applications on soil enzyme activities in Eucalyptus plantations in North Guangxi, and provide theoretical references for the rational application of biochar to Eucalyptus plantations. Based on field experiments, biochar was prepared anaerobically at 500 ℃ from branches of Eucalyptus plantation harvesting residues, and with six treatment groups, such as 0(CK), 0.5%(T1), 1%(T2), 2%(T3), 4%(T4), and 6%(T5), to analyze the changes in soil enzyme activities under different application rates after one year importation. The results were as follows:(1)The soil enzyme content decreased gradually as the soil layer deepened.(2)In the same soil layer, the contents of urease, catalase, β-glucosidase and dehydrogenase increased with the increase of biochar application, and the highest contents were found at 6% of biochar application.(3)With the increase of biochar application, the contents of acid phosphatase, sucrase, leucine aminopeptidase and cellobioglucosidase showed a trend of first increasing and then decreasing. Acid phosphatase and leucine aminopeptidase had the highest contents at 2% of biochar application. Sucrase and cellobioglucosidase had the highest contents at 4% of biochar application. In general, the biochar application increased the soil enzyme activities of Eucalyptus plantations. The results of this study can provide a scientific basis for the application of forestry waste biochar in Eucalyptus plantations. |
Key words: biochar, soil enzyme activity, Eucalyptus plantations, North Guangxi, field experiment |
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