含哑变量的景宁栎类单木断面积生长模型

打开文本图片集

中图分类号：S718.5 文献标志码：A 文章编号：1673-923X（2025）08-0012-08

Abstract：【Objective】TheoakspecieswithinthenaturalarborealforestsJingningSheAutonomousCounty，ZhejiangProvince， wereselectedastheseachsubjectstoinvestigateteapropratenessincoporatingforeststandspatialstructureintodiidual treebasalareagrowthmodelsoak forestsanditspotential toenhancetheaccuracy growthprediction.【Method】Basedonthe continuousforestresouceinventorydatafrom ZhejiangProvincein2014and2019，integratingforeststandspatialstructurefactors sucha theHegyicompetitionindex，completengling，andaggregationindex.Byemployingthetropymethod，acomprsive spatialstructureIndex（S）isonstrctedtullyeflecttespatialdistrbtionndcompeitiveelatioshistrs.Utlgte upper exclusion method， the S is categorized into three distinct levels and introduced as a dummy variable into four commonly appliedtheoreialothuatioselyacheso-machprtdLgstcisegatibls individual tree basal area growth models inclusive the s dummy variable. Subsequently，acomparative analysisis conducted with the fundamental growth models that do not incorporate the S dummy variable to assess the influence spatial structure on growth prediction accuracy.【Result】1） S exertsasignificantly positive influence on the growth breast-height basal area;2） incorporating S as adummyvariableintothefourfoundational growth modelsenhanes the modelsfitingaccuracyandpredictiveprecision;3）among all the models tested，the basal area growth model that integrates s asa dummy variable，based on the Johnson-Schumacher model， demonstratestheighstpredictiveaccuracy【Conclusion】Incorporatingstandspatialstructureintoindividualtreebasalaragowth modelsisnotonlysuitableforapplicationbutalsoimprovestheauracytregrowthpredictions.Holdingsubstantial teoreticaland practical significance for forest management and ecological conservation.

Keywords：basalarea increment; comprehensivespatial structure index;dummyvariables;individualtree growth model

天然林是森林生态系统的重要组成部分，具有结构稳定、生物多样性丰富的特征，是维护国家生态安全的重要生态屏障[1。（剩余13547字）