雨雪冰冻灾害对滇东南5种人工林的影响

Impact of the Freezing Rain and Snow Disasters on Five Plantations in the Southeast Yunnan

2008年初,在波及我国南方大部分地区的雨雪冰冻灾害中,云南省文山州作为一个亚热带地区,森林资源受到严重破坏。在对受灾情况进行调查的基础上,依据损失程度、受损类型以及受灾前后郁闭度、单位面积蓄积量、胸高断面积的变化情况,分析雨雪冰冻灾害对当地5种人工林的影响。结果表明:外来树种的大面积造林,未能做到适地适树,是调查区人工林大范围受灾的主要原因之一。区别不同经营主体和经营目标,提出人工林营造中科学合理地选择造林树种的建议,为今后的人工林营造技术及管理提供借鉴。

Early in 2008,a frozen rain and snow weather spreading over most parts of south China caused a big disaster.Forest resources in Wenshan Prefecture of Yunnan Province,as a subtropical region,had been seriously damaged.This paper investigated impacts of the disaster on the plantations by estimating the damage degrees,analyzing the damage types and comparing the forest closure,diameter at breast height.The result revealed that large-scale afforestation with exotic species,without considering appropriate trees adapting to the local environment,was one of the main reasons that caused serious loss in the investigated region.At the current stage of China＇s ongoing right reform in using the collective forest land,the majority of farmers will truly become the operators of woodland,and forest classification management is under being fully implemented.This article in this context distinguished the difference between management and operation of the main objectives,proposed the recommendations for a scientific and rational choice of tree species in future plantations,provided a reference for technical and management of afforestation.