摘要
在搞清沙地樟子松枯梢病的发生规律和原因等基础上,开展针对性强、切实可行的营林措施试验,取得了良好的控制效果。对40a生左右或更老的发病林分以卫生伐为主,逐步改造成疏林草地;对30a生左右,染病较轻、生长迟缓的林分,进行密度和结构调整,引进阔叶乔木或灌木,改造成混交林,还可进行混农或混牧作业;对年龄较小,20a生左右、生长旺盛的林分,应及时采取"留优去劣"式的间伐。试验发现,修枝可减免无效蒸腾,缓解水分矛盾,降低林木的"物理年龄",增强树势,是防病治病的良好措施。对20a生以上的林木,以保留10～15轮侧枝为宜。
Studies on pertinent and practical silvicultural measures were carried out to control Sphaeropsis shoot blight of Pinus sylvestris var. mongolica in sandy area based on understanding the causes and epidemiology of the disease. Sanitation cutting was suggested to the infected trees over or around 40 years old,and gradually changing the stand to scattered trees and grassplots. For those about 30 years old,with slow growth and light infection, it was recommended to adjust density and structure of the plantation, introduce broadleaves, shrubs, or agricultural crops and grasps. For vigorously-growing trees about 20 years old, it was advised to lower the stand density by removing the suppressed. Prunning could derate unnecessary transpiration, reduce water shortage, lower the physical age and promote vigor of the trees. It is encouraged to prun trees with 10 to 15 whorls of branches left on each tree for controlling the disease.
出处
《中国森林病虫》
北大核心
2008年第3期30-33,共4页
Forest Pest and Disease
基金
国家"十一五"科技支撑项目"北方主要人工林寄主主导性病害控制技术"(2006BAD08A11106)
辽宁省自然科学基金资助"以水量平衡为核心的稳定高效植物群落建设技术研究"(2041005)
关键词
松枯梢病
营林措施
樟子松
Sphaeropsis sapinea
silvicultural measure
Pinus sylvestris var. mongolia
作者简介
宋晓东（1964-），男，辽宁北票人，研究员，主要从事森林经营与保护和治沙研究。
