杨树烂皮病空间格局及抽样技术的研究  

Spatial Pattern and Sampling Technique of Poplar Cytospora Canker

作　　者：张星耀[1] 赵仕光[1] 刘贤德 

机构地区：[1]西北林学院森林资源保护系,陕西杨陵712100 [2]甘肃省张掖地区森防站,甘肃张掖734000

出　　处：《西北林学院学报》1993年第1期21-26,共6页Journal of Northwest Forestry University

摘　　要：用Taylor幂法则和Iwao回归研究了杨树烂皮病的空间格局,认为其格局是以感病杨树个体群为基本分布成份的均匀分布,并从感病株数、病情指数两个水平给出了最适抽样、数据代换、序贯分析的模型群。Describes the spatial pattern of Cytospora chryansperma by Taylor power rule and I-wao regression. The pattern was well distributed based on canker tree groups as basic distributial element. Relative mathematical models of best sampling ,data transformation and order relative analyzing were drown out on the level of incidence and disease index.

关 键 词：杨树 烂皮病 抽样技术 

分 类 号：S763.721.1[农业科学—森林保护学]