文献类型：期刊文献

中文题名：红河干热河谷人工恢复植被土壤微生物和酶的变化与土壤营养化学计量的关系

英文题名：The Relationship of the Soil Microbial and Enzymes Changes with Soil Nutrition Stoichiometry in Artificial Vegetation Restoration in Honghe Dry-Hot Valleys

作者：贺思腾[1,2] 李昆[1] 刘方炎[1] 高成杰[1] 杨品周[3]

第一作者：贺思腾

机构：[1]中国林业科学研究院资源昆虫研究所,云南昆明650224;[2]南京林业大学林学院,江苏南京210037;[3]红河州红河县林业和草原局,云南红河654400

年份：2020

卷号：35

期号：6

起止页码：1073-1080

中文期刊名：云南农业大学学报：自然科学版

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

基金：国家重点研发计划项目专题(2017YFC0505101)。

语种：中文

中文关键词：干热河谷;人工植被;稀树灌草;土壤;微生物;酶

外文关键词：dry-hot valley;artificial vegetation;savanna;soil;microbial;enzyme

分类号：Q948.156;S154.3

摘要：【目的】探究红河干热河谷人工恢复植被土壤氮、磷、钾化学计量与土壤微生物和酶之间的关系,以期为干热河谷区不同植被恢复模式对土壤特征的影响提供理论依据和参考。【方法】以红河干热河谷人工恢复植被和稀树灌草丛为研究对象,采用野外样地调查及室内控制试验的方法,分析久树和铁刀木2种人工纯林与以虾子花为主要植被类型的稀树灌草丛的土壤化学性质、酶及微生物之间的相互关系。【结果】群落中根系土壤与非根系土壤在有机质、全氮、水解性氮、有效磷、速效钾、缓效钾、蛋白酶、脲酶、细菌和真菌含量存在显著差异(P<0.05);3种群落的根系与非根系中放线菌含量差异不显著(P>0.05),3种群落根系土壤酸性磷酸酶含量差异不显著(P>0.05);无论是人工恢复植物群落还是稀树灌草丛,根系土壤的活性都较非根系土壤活性高;通过冗余分析(RDA)表明:细菌、真菌和放线菌与缓效钾、速效钾和酸性磷酸酶呈正相关关系;此外,只有蛋白酶与3种微生物呈负相关,驱动群落变异的主要因子是缓效钾,其次是有效磷、有机质和酸性磷酸酶。【结论】通过人工植被恢复能够改善红河干热河谷林地的群落环境和土壤理化性质,相较于稀树灌草丛群落,人工恢复群落的土壤营养物质能获得更高效的利用,土壤微生物群落数量和结构得到改善,亦为揭示干热河谷的森林生态系统物质循环提供依据。
[Purpose]The relationship between soil chemical stoichiometry of nitrogen,phosphorus and potassium and soil microbial and enzymes in the artificial restoration of vegetation in Honghe dry-hot valley is explored.In order to provide theoretical basis and reference for the influence of different vegetation restoration patterns on soil characteristics in dry-hot valley.[Method]The relationship between soil chemical properties,enzymes and microbial of two pure plantations,Schleichera oleosa and Cassia siamea,and savanna with Woodfordia fruticosa as the main vegetation types in Honghe dry-hot valley,was analyzed by field sample investigation and indoor control experiments.[Result]There were significant differences in the contents of organic matter,total nitrogen,hydrolytic nitrogen,available phosphorus,available potassium,slow-acting potassium,protease,urease,bacteria and fungi between root system and non-root system soil of three communities(P<0.05),while there was no significant difference in the contents of actinomycetes between root system and non-root system soil of different vegetation communities(P>0.05).There was no significant difference in acid phosphatase content between three communities(P>0.05).The activity of root system soil was higher than that of non-root system soil in both artificial restoration vegetation communities and sparse shrubs and grasslands.Redundancy analysis(RDA)showed a positive correlation with bacteria,fungi and actinomycetes.Slow-acting potassium,available potassium and acid phosphatase were negatively correlated with only protease.The main factors driving community variation were slow-acting potassium,followed by available phosphorus,organic matter and acid phosphatase.[Conclusion]The community environment and soil physicochemical properties can be improved by artificial vegetation restoration in Honghe dry-hot valley,compared with the savanna community,the soil nutrients of artificial vegetation restoration can be utilized more efficiently and the quantity and structure of soil microbial community can be improved,which provides a basis for revealing the material cycle of the forest ecosystem in the dry-hot valley.