摘要
通过1987-1991年在吉林省磐石等3个县(市)17个林场300余块长白落叶松(Larixolgensis)人工林标准地调查、定点现实试验和统计分析表明,落叶松落叶病(MycosphaerellaLarici-leptolepis)的林分病情指数与林分密度、林分类型、平均枝下高、土壤种类、林龄和林分地形有密切关系;对1990年103块标准地的数量化理论1分析,其偏相关系数分别为0.723、0.605、0.627、0.323、0.634、0.426,复相关系数为0.919.标准差为0.94,由此确定落叶松落叶病的生态模型为Y=15-23C_(11)-15C_(12)-C_(13)+21C_(21)+6C_(22)+9C_(23)+19C_(31)+9C_(32)+8C_(41)+3C_(51)+19C_(52)-10C_(61),式中Y为林分病情指数,C_(11)-C_(62)为林分生态因子(水平)。并由此确定了落叶松落叶病林分病情的预测预报技术和营林、造林控制技术。
rom 1987 to 1991.an intensive investigation on the ecology of Larch leaf cast was madein 17 forest farms of Panshi and two other counties in jilin province. The data analysis ofthree hundred plots of larch plantations Larix olginsis revealed that the disease index of larchneedle cast had a close relation with density. type,height of clearance, soil, age and topogra-phy.The ecological model of larch needle cast was thus tstablished as follows:Y=15-23C_(11)-15C_(12)-C_(13)+21C_(21)+6C_(32)+9C_(23)+19C_(31)+9C_(32)+8C_(41)+3C__(51)+19C_(52)-10C_(61) where Y stands for the forest disease index,and C_(11)-C_(62) stands for forest ecological factors(Levels).Based on the above model, model, a technique for forcasting the disease index of Larchplantations and for larch leaf cast management was developed in this paper.
出处
《生态学报》
CAS
CSCD
北大核心
1995年第2期201-206,共6页
Acta Ecologica Sinica