摘要
对湿地松和火炬松枯梢病与立地条件和林分因子的相关性进行研究表明,树种、成土母质、土壤、林龄和雪压与松树枯梢病的发病率显著相关,其偏相关系数依次为树种>成土母质>土壤>林龄>雪压;树种、成土母质、土壤、林龄和造林质量与病害严重程度密切相关,其偏相关系数依次为树种>成土母质>土壤>林龄>造林质量。各因子与发病率的复相关系数为0.8382098,与病害严重程度的复相关系数为0.8687435。对此病害,宜采用综合技术措施进行防治。
The correlation between pine dieback and the site conditions and stand factors was studied. Results show that pine species and snow injury are markedly linked to dieback incidence, their partial correlation coefficients falling in the greatest—smallest order of pine species, parent rock, soil condition, stand age and snow injury. The severity degree of dieback is closely tied to pine species, parent rock, soil condition, stand age and planting quality, their partial correlation coefficients falling in the greatest—smallest order of species, parent rock, soil, stand age and planting quality. The multiple correlation coefficient of the disease incidence with each of the factors is 0.8382098, whereas that of the severity degree with each of the factors is 0.8687435. In view of these results, integrated measures to control pine dieback are proposed.
出处
《中南林学院学报》
CSCD
1993年第2期199-202,共4页
Journal of Central South Forestry University
关键词
湿地松
火炬松
枯梢病
林分
Pinus elliottii
P.taeda
dieback
site condition
stand factor
correlation
