辽宁省油松枯萎损失的估测

Estimation of the dieback loss of Pinus tabulaeformis in Liaoning province

油松枯萎是 90年代以来在辽东、辽南和辽北等地区普遍发生的病害 ,目前 ,全省发生面积已接近 5～ 6万hm2 。文章采用树干解析方法 ,计算出单位面积上 0～Ⅳ级病木生长损失量 ,通过推算 ,计算出全省各地区因油松枯萎所造成的材积损失及经济损失 。

Dieback of Pinus tabulaeformis was a common disease that occurred in Eastern, Southern and Northern Liaoning and other areas since 1990's, the total infected area in our province reached 50～60 thousand hectares. In this paper, the growth loss of grade 0～Ⅳ infected individuals per unit area was calculated by using stem analysis ;volume and economic loss of each district in the whole province were worked out by induction.