[1]巢 林ab,等.喀斯特山区不同土地利用方式对土壤微生物生物量、酶活性及其化学计量的影响[J].山地学报,2023,(1):28-40.[doi:10.16089/j.cnki.1008-2786.000728]
 CHAO Lina,b,,et al.Effects of Different Land Use Patterns on Soil MicrobialBiomass, Enzyme Activity and Stoichiometry in the Mountainous Karst Areas of China[J].Mountain Research,2023,(1):28-40.[doi:10.16089/j.cnki.1008-2786.000728]
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喀斯特山区不同土地利用方式对土壤微生物生物量、酶活性及其化学计量的影响
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2023年第1期
页码:
28-40
栏目:
山地环境
出版日期:
2023-01-20

文章信息/Info

Title:
Effects of Different Land Use Patterns on Soil MicrobialBiomass, Enzyme Activity and Stoichiometry in the Mountainous Karst Areas of China
文章编号:
1008-2786-(2023)1-28-13
作者:
巢 林1a1b 2 3 曾 鑫1c 欧梦菲1c 黄忻婷1c张建兵1a 1b 刘艳艳1a 1b*
(1. 南宁师范大学 a. 北部湾环境演变与资源利用教育部重点实验室; b.广西地表过程与智能模拟重点实验室; c.地理科学与规划学院, 南宁 530001; 2. 中国科学院华南植物园 中国科学院退化生态系统植被恢复与管理重点实验室,广州 510650; 3. 湖南会同森林生态系统国家野外科学观测研究站,湖南 会同 4183072)
Author(s):
CHAO Lin1a 1b 2 3 ZENG Xin1c OU Mengfei1c HUANG Xinting1c ZHANG Jianbing1a 1b LIU Yanyan1a 1b*
(1. a. Key Laboratory of Environment Change and Resources Use in Beibu Gulf, Ministry of Education; b. Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation; c. School of Geography and Planning, Nanning Normal University, Nanning 530001, China; 2. Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; 3. Hunan Huitong National Research Station of Forest Ecosystem, Huitong 418307, Hunan, China)
关键词:
土地利用 土壤性质 土壤养分 微生物熵 冗余分析 中国喀斯特山区
Keywords:
land use change soil properties soil nutrients microbial quotient redundancy analysis the mountainous karst areas of China
分类号:
Q148
DOI:
10.16089/j.cnki.1008-2786.000728
文献标志码:
A
摘要:
土地利用改变土壤理化性质,显著影响土壤微生物属性。在中国喀斯特地区,针对不同土地利用方式下土壤酶活性及其化学计量特征与土壤环境因子之间的关系,仍缺乏精确的定量认知,无法科学指导土地利用结构的优化与生态系统功能的维持。本文选取中国广西弄岗自然保护区4种土地利用方式(农田、草地、灌木林和森林)地块,采用土壤生物化学、酶学等方法,探讨不同土地利用方式对喀斯特土壤基本理化性质、微生物生物量、微生物熵、酶活性和酶化学计量的影响。结果表明:(1)土地利用方式显著影响土壤基础理化性质,土壤pH、有机碳(SOC)和全氮(N)含量表现为灌木林和森林显著高于农田和草地,而农田和草地土壤有效磷(AP)含量则显著高于森林和灌木林;(2)土壤微生物碳(MBC)和微生物氮(MBN)表现为灌木林>农田>森林>草地,且灌木林MBC和MBN显著高于其他土地利用方式,微生物磷(MBP)在农田土壤中最高; 冗余分析(RDA)表明有效氮(AN)和pH是驱动土壤微生物生物量变化的主要环境因子;(3)微生物熵碳(qMBC)和微生物熵氮(qMBN)均表现为农田>灌木林>草地>森林,且农田土壤qMBC 和qMBN显著高于森林,而不同土地利用方式土壤微生物熵磷(qMBP)无显著差异;(4)不同土地利用方式显著影响N-乙酰氨基葡萄糖苷酶(NAG)、 β-葡萄糖苷酶(BG)和酚氧化酶(PHO)活性,土壤酶活性变化受土壤C:N、SOC、pH和P含量调控;(5)不同土地利用方式对土壤酶化学计量碳氮比(eC:N)、碳磷比(eC:P)、氮磷比(eN:P)和微生物资源限制程度具有显著影响,磷是喀斯特地区土壤微生物最为受限的元素,由农田、草地到灌木林,微生物碳限制逐步增加,森林土壤碳限制程度最低。喀斯特地区不同土地利用方式引起土壤理化性质的改变是土壤微生物生物量、酶活性和酶化学计量变化的主要驱动力。研究结果可为喀斯特地区土地利用的科学规划提供参考,对预测喀斯特地区土壤微生物属性如何响应全球变化背景下土地利用与覆被变化具有重要作用。
Abstract:
Land use changes soil physical and chemical properties and significantly affects soil microbial properties. In the mountainous karst areas of China, there was still a lack of scientific recognition on the correlation between soil enzyme activity and its stoichiometric characteristics and soil environmental factors under different land use patterns, making it hard to scientifically guide the optimization of land use structure and the maintenance of ecosystem function.In this paper, four land use patterns(farmland, grassland, shrubland and forestland)in the Nonggang National Nature Reserve of Guangxi of China were investigated by means of soil biochemistry and enzymology. It examined the effects of the four land use patterns on basic physical and chemical properties, microbial biomass, microbial quotient, enzyme activity and enzyme stoichiometry in karst soils.Following results were obtained:(1)Land use patterns had strong influences on the soil physicochemical properties. The Soil pH, SOC and N contents in the shrubland and forestland were higher than those from the cropland and grassland; however, the concentrations of soil phosphorus available in the cropland and grassland were higher than those from the shrubland and forestland.(2)The soil microbial biomass carbon(MBC)and microbial biomass nitrogen(MBN)contents were in a descending order of shrubland > cropland > forestland > grassland; The shrubland had higher MBC and MBN as compared with ones in all other land use patterns; microbial biomass phosphorus(MBP)was found the highest in the cropland. The redundancy analysis(RDA)suggested that the content of soil available nitrogen and pH value were the main environmental factors driving soil microbial biomass.(3)The ratio of MBC to SOC(qMBC)and MBN to N(qMBN)both were in a descending order of cropland > shrubland > grassland > forestland, with qMBC and qMBN in the cropland being higher than those from other land use types, but there was no significant difference in the ratio of MBP to P(qMBP)in different land use patterns.(4)The land use patterns had great impact on N-acetylglucosaminidase(NAG), β-glucosidase(BG)and phenol oxidase(PHO)activities; soil C:N, SOC, pH and P concentration were the main factors driving the changes of soil enzyme activities.(5)Soil enzyme stoichiometry C/N ratio(eC:N), C/P ratio(eC:P), N/P ratio(eN:P)and microbial resource limitation were largely affected by the land use patterns. P was the most restricting elements for soil microorganisms in karst areas; soil microbial carbon restriction was the highest in the shrubland and grassland but the lowest in the forestland. Therefore, changes in soil physical-chemical properties induced by varied land use patterns were the main driving force of soil microbial biomass, enzyme activities and enzyme stoichiometry. The results provide references for scientific planning of land use in mountainous karst area, and thus plays a positive role in predicting how soil microbial attributes will respond to land use and land cover change in the context of global change.

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备注/Memo

备注/Memo:
收稿日期(Received date): 2022-09-17; 改回日期(Accepted date): 2023-02-20
基金项目(Foundation item): 中央引导地方科技发展基金项目(桂科AD19245133; 桂科AD20238078); 中国博士后科学基金(2022M713194); 南宁师范大学科研启动项目(602021239257, 602021239137); 北部湾环境演变与资源利用教育部重点实验室开放课题(NNNU-KLOP-X1917, GTEU-KLOP-X1709)。[Local Science and Technology Development in Central Government Guides(AD19245133, AD20238078); China Postdoctoral Science Foundation(2022M713194); Project for Science Research Initiation of Nanning Normal University(602021239257, 602021239137); Opening Foundation of Key Laboratory of Environment Change and Resources Use in Beibu Gulf Ministry of Education(NNNU-KLOP-X1917, GTEU-KLOP-X1709)]
作者简介(Biography): 巢林(1988-),男,博士,安徽六安人,助理研究员,主要研究方向:森林生态学。[CHAO Lin(1988-), male, Ph.D., born in Lu'an, Anhui province, assistant professor of research, research on forest ecology] E-mail: fjchaolin@126.com
*通讯作者(Corresponding author): 刘艳艳(1986-), 女,博士,助理研究员,主要研究方向:植物生理生态。[LIU Yanyan(1986-), female, Ph.D., assistant professor of research, research on plant physiology ecology] E-mail: liuyanyan5000@163.com

更新日期/Last Update: 2023-01-30