[Relationship between decline disease of exotic pines(Pinus taeda and P. eliottii) and forest stand and environmental factors].
The relationship between decline disease of exotic pines(Pinus taeda and P. eliottii) plantations in Anhui Province and forest stand status and environmental factors was quantitatively analyzed. Among 18 variable factors from 4 types of factors(climate, soil, stand status, and other diseases and insect pests), 10 factors contributed greatly to the state of illness. These were tree age, stand density, resin-tapping, rainfall, temperature, clay soil, stone soil, soil depth, water-logging, and other diseases and insect pests. Of them soil depth and rainfall negatively, and others positively related with the severity of disease. Accordingly, a linear multiple regression model was derived, which might predict the developmental level of decline disease at any given conditions of exotic pine plantation. In addition, the spiral chart of decline disease was mapped based on the action size and time order of various nosogenetic factors during the incidence of decline disease, which was used to visually describe and quantitatively analyze the disease with complicated causes.
Shu
Q
Q
Anhui Agricultural University, Hefei 230036. qinglongshu@21cn.com
Zou
Y
Y
Yang
G
G
Zhu
Q
Q
Huang
C
C
D015984:Causality; D002980:Climate; D004777:Environment; D028223:Pinus / Q000502:physiology*; D041603:Pinus taeda; D010935:Plant Diseases / Q000209:etiology*; D011891:Rain