湖北林业科技

Abstract:Shennongjia is a significant natural enviroment protection area, has plentiful plant resource in this area,Pinus armandii is the main coniferous forest in forest zone.In resent years,P.armandii has been serious destoried by Dendroctonus armandi.Selected the infected area background data in the past few years,analysized the occurrence trend and the relationship of different altitude and average annual temperature with D.armandi,assesment the difussion area. Result shows the status of pest will be a high occurred situation in the central and west part, especially in the high altitude region.It was a serious damage above 1822 m,and the altitude has a positive correlation with infected area,the fitted equation is Y=657.57143+374.11905X-30.2381X2，R2 is 0.92704,but nonsignificant.Annual average high and low temperature has the same linear correlation with the damaged area of D.armandi,annual average low and high temperature is 7℃ to 9℃ and 16℃ to 20℃,the fitted equation is Y=4.65618E9-4.62645E6X+1149.22685X2,R2 is 0.87189.