间伐抚育林分物候试验研究

本文对松青、浩良河落叶松人工林进行间伐抚育买验,通过不同间伐抚育强度后,各实验区保留木数量、质量、小区气候,林木物候发生有规律性的变化。随间伐强度的加大,林内积温指数在增加,生长候提前,休眠候拖后,生长期延长。从保留木数量、质量变异规律看,20％间伐强度为最佳气候和林木物候型。这对指导营林生产,防止自然灾害,病虫危害、火险预报提供理论基础。

EXPERIMENT ON PHENOLOGY OF STAND WITH INTERMEDIATE CUTTING

Intermediate cutting experiment on Larch plantation was conducted in Songqing, Haolianghe forest farm. The quality and quatity of reser ved trees, microclimate, tree phenology changed regularly with different intensity of cutting. With the cutting intensity increased, the accumulated temperature index increased: growing phenology ahead of time, dormancy phenolory is late, and growing period prolonged, from the view of quality and quatity of reserved trees, it posses the optimum climate and tree phenology with intensity of 20%, this supply a theoritical basis for forest production, prevent from natural disaster, forest disease and insect, forecast of fire danger.