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通过对４０块标准地的调查，应用数量化理论Ⅰ，对大兴安岭北部（西林吉、十八站、呼中林业局）兴安落叶松心材白腐（Ｐｈｅｌｉｎｕｓｐｉｎｉ）的病腐株率与兴安落叶松的林龄、密度和地位级、海拔、坡度、坡向等环境因子进行了相关分析。结果显示：大兴安岭北部该病的发病株率与林龄、林分密度、地位级、海拔、坡度和坡向相关（复相关系数Ｒ＝０８２５０）。其中影响发病的主要因子是林龄（ｒ＝０７３９８），其次是海拔和坡向（ｒ＝０３９０５、ｒ＝０３３２６），坡度（ｒ＝０２０９６）、密度（ｒ＝０１２３９）、地位级（ｒ＝０２４８６）与病害发生的关系不大。同时建立了兴安落叶松心材白腐株率与各因子相关关系的数学模型。结果表明控制该病的最有效途径是适时采伐。
Through the investigation of 40 standard plots and using quantitative theory Ⅰ, the relationship between the rate of rotting of Phelinus pini in Larix gmelinii and Dahurian larch (Xilinji, Shibashan and Huzhong Forestry Bureau) Age, density and status level, elevation, slope, aspect and other environmental factors were analyzed. The results showed that the incidence of the disease in the northern part of Daxinganling was related to forest age, stand density, status, elevation, slope and aspect (complex correlation coefficient R = 0.8250). Among them, the main factor influencing the incidence of disease was age (r = 07398), followed by elevation and aspect (r = 03905, r = 03326), slope (r = 02096) 0 1239), status level (r = 0 2486) has little to do with the disease. At the same time, a mathematical model of the relationship between the white rot plantlet percentage of Larch heartwood and various factors was established. The results show that the most effective way to control the disease is timely harvesting.