【摘要】 以云南省施甸县大亮山林场为研究地,对影响该林场华山松木蠹象虫害发生的环境因子进行了调查研究。利用逐步回归分析法对其调查数据进行处理,结果表明:在95%的可靠性下,影响施甸大亮山林场华山松木蠹象虫害发生所体现的虫口密度的主要环境因子是华山松林的林分密度,其次是其林分结构和林分所处的海拔高度。更多还原

【Abstract】 Choosing Daliangshan Forest Farm of Shidian county as study area,the environmental factors affecting the occurrence of Pissodes punctatus were studied.Using stepwise regression analysis method,the investigation data were processed.The results showed that under the dependability of 95 %,the main environmental factors affecting the insect density was planting density,next came the structure of stand and altitude.更多还原