A method for determining the spatial pattern of forest trees based on the uniformity theory  

作　　者：Yeqiong Shi Xiulong Gao Chunling Lang Chuanwen Luo 

机构地区：[1]College of Computer Science and Information Engineering,Harbin Normal University,Harbin 150040,People’s Republic of China [2]College of Vocation and Technical Education,Guangxi Science and Technology Normal University,Laibin 546199,People’s Republic of China [3]College of Mathematics and Computer Science,Guangxi Science and Technology Normal University,Laibin 546199,People’s Republic of China [4]College of Forestry,Northeast Forestry University,Harbin 150040,People’s Republic of China

出　　处：《Journal of Forestry Research》2024年第6期148-159,共12页林业研究（英文版）

基　　金：funded in part by Research on Intelligent Control System of Variable Fertilization of Deep Application Liquid Fertilizer(GXKS2022GKY003);Research on Vehicle Ranging System Based on Object Detection and Monocular Vision(2022KY0854).

摘　　要：The spatial pattern of trees is an important feature of forests,and different spatial patterns of trees exhibit different ecological stability.Research has confirmed that natural forests with random patterns have higher biodiversity and stronger resistance to unstable factors such as pests and diseases.Even if they are disturbed or destroyed by unstable factors such as pests and diseases,they can still recover and rescue themselves;while artificial forests with uniform and clustered patterns have lower biodiversity and are susceptible to unstable factors such as pests and diseases.And once pests and diseases occur,it’s more difficult for them to recover.In order to promote the healthy and stable develop-ment of the forestry industry and protect the diversity of the biological environment,it is necessary to protect the random pattern of natural forests from being destroyed in the process of forest management,while effectively transforming the spatial pattern of artificial forests into a random pattern.Therefore,in order to ensure the convenient and accurate determination of the type of forest spatial pattern,research on methods for determining forest spatial pattern has become particularly important.Based on the theory of uniformity,this study proposes definitions and related theories of included exclusive sphere,included exclusive body,included random pattern,and included uniformity.Under the guidance of the definition of inclusion uniformity and related theories,and by using mathematical method,it is proved that the uniformity of inclusion(CL)is asymptotically subject to the Eq.18,Therefore,the relationship between the included uniformity(CL)and the number of trees in the sample plot was established,and the corresponding relationship formula was obtained,and then the determination of the spatial pattern type of trees was completed by using the corresponding relationship formula.Through rigorous reasoning and case verification,the determination method of forest spatial pattern is effective.

关 键 词：UNIFORMITY Forest spatial pattern Contained exclusive sphere Co correlation coefficient Included Uniformity 

分 类 号：S718.5[农业科学—林学]