光量与球蚜发生关系的研究

在小兴安岭原始林内和采伐迹地上,发现以下几种球蚜:落叶松球蚜(Adelges laricisVall.),落叶松绿球蚜(Sacchiphanles viridis Ratz.)、落叶松红瘿球蚜(S. rosegallis Liet Tsai)、冷杉球蚜(Aphrastasia pectinatae Chol.) 以及红松球蚜(Pineus cembraepinilcoreanus Zhang et Fang),它们在林内分布和大量发生,其原因除了针叶树种类和树木

STUDY ON RELATIONSHIP BETWEEN THE LIGHT INTENSITY AND POPULATION DENSITY OF ADEIGIDS IN SHAOSHING-ANLING

1. In Shaoshing-Anling cutover area, due to great variations in climatic factors, on which a originally damp and humid natural forest was turned into a warm, sunny and dry younger forest after all the big trees are cut down. Among the smaller trees, the most important one is Pioea Koraiensis, next is Abies nephrolepis, Larix dahurics and Pinus koraiensis, With the changes in the forest tree species, age of trees, tree density and other climatic factors, the population density of several phototactic Adelgids...