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An Ecological Study for Management of Suburban Forests

郊区森林管理的生态学研究

基本信息

批准号：
04454086
负责人：
CHIBA Kyozo
金额：
$ 2.24万
依托单位：
Okayama University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1993
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04454086/
关键词：
Suburban Forests Pine Forest Soil Matter Nitrogen Fixation Nitrogen Dynamics System Dynamics Succession マツノザイセンチュウ病被害

项目摘要

Recently suberban forests are have been recognized as an important environment for the citizen life, nevertheless there has been few ecological knowledge how to manage them. The aim of this study is to get the ecological bases for the management of the suburban forests. The results are as follows :(1) In pine forests suffered from the pine wilt disease, the treatment of cutting-off of dead stem occurs reverse succession because of the disturbances of forest floor. Damaged forests ignored promote the succession to broad-leaved forests, in this case, pine may regenerate if litter is removed.(2) A system dynamics model on the vegetation changes is developed. As it reappears very well many varieties of succession of pine forests suffered from the pine wilt disease, it will give useful information for the management of suburban pine forests.(3) Biological nitrogen fixation, mineralization and immobilization of nitrogen process occurs only surface part of forest soil system which support the biomass productions and succession of the forest.(4) Removal and disturbance of the litter -surface organic matters of forest soil- occurs not only distinctive decrease of biological nitrogen fixation, mineralization and immobilization of nitrogen but also might denature microbiological composition and activities, besides changes of soil colloids. Consequently productions and succession of forest ecosystem would disturbed profoundly.

近年来，苏贝尔班森林已被公认为是市民生活的重要环境，然而，很少有生态知识如何管理它们。为城郊森林经营提供生态学依据。结果表明：（1）在发生松材线虫病的松林中，由于林下植被的干扰，枯死树干的扦插处理发生了逆向演替。被破坏的森林被忽视，促进了阔叶林的演替，在这种情况下，如果凋落物被清除，松树可能会再生。(2)建立了植被变化的系统动力学模型。由于它很好地再现了受松树枯萎病危害的松林的多种演替类型，因此，它将为城郊松林的经营管理提供有用的信息。(3)生物固氮、矿化和固定氮的过程只发生在森林土壤系统的表层，支持森林的生物量生产和演替。(4)森林土壤表层有机质--凋落物的去除和干扰，除了使土壤胶体发生变化外，还可能使生物固氮、矿化和氮的固定明显减少，并使微生物的组成和活性发生变化。森林生态系统的生产和演替将受到严重干扰。