摘要
南京老山林场火炬松、湿地松种源试验林（１３年生）近三年发生了严重的松枯梢病和松针褐斑病．火炬松种源间感病指数和生长变异均为极显著，感病指数与高、轻生长相关显著，其中佛罗里达·纳索、阿拉巴马·埃尔卡拉、密西西比·斯格特和佐治·爱克特四个种源感病最轻，生长量较大，感病指数亦比种源平均值小１３．４１％～３２．８０％，抗病优株率达７．４７％，可在种源和个体二个层次对抗病和生长同时进行选择．湿地松的种源感病指数变异不显著，但生长变异显著，抗病优株率４．８０％，也可在生长良好的阿拉巴马·英德、佐治亚·布克勒、佐治亚·米伦、福建·南屿、佛罗里达·泰勒５个种源中选择抗病优株．
The provenance-testing plantation of loblolly and slash pine which established in 1982 had been severely damaged by pine die-back disease (Diplodia pinea ) and brown-spot needle blight (Iecanosticta acicola) near Nanjing during 1992～1994. Significant difference of resistance to both fungi were found among loblolly pine seed sources but not for slash Pine, and the resistance was obviously relative to height and diameter growth. Several seed sources in loblollypine (No. 9, 12, 13 and 19 from Narran Flo., Ercambla Ala.,Scott Miss. and Ellert Geor. respectively ) were more resistant than those from other locations and masson pine, their disease indexes were less than average of all seed sources by 13.41%～32.80%. There were slightly infected or noninfected individuals in severely damaged population of both pine species (the percentage was 7. 47% in loblolly pine and 4.80% in slash pine). Therefore, the selection for loblolly pine could be carried out inside two levels-sources and individuals, and for slash pine, the section could be carried out among individuals of different seed sources.
出处
《福建林学院学报》
CSCD
1996年第3期209-214,共6页
Journal of Fujian College of Forestry
基金
国家"七五"攻关项目
关键词
火炬松
湿地松
种源
松枯梢病
松针褐斑病
loblolly pine, slash pine, provenance, resistance, disease index
