摘要
本文就大兴安岭地区的若干树种进行心腐的外部特征及延伸程度的总结和分析,认为:兴安落叶松心腐的外部特征是外表有破损或破损痕迹,树皮干枯,树干凸凹不平,有鼓包,心腐一般延伸距鼓包1.5—2m。白桦:①萌生林的心腐由老树墩引起,有条件时腐朽会蔓延;②活立木的心腐多数在根部,其延伸程度有规律;③实生林的心腐只有在枯立木、冻裂的活立木上发生。杨树:①甜杨心腐发生在少数过熟林的根部,延伸1—3m;②山杨心腐的外部特征是有乳头状的鼓包,材身表面有菌,根部心腐一般延伸2—3m,树干心腐面积小,延伸长。
This paper analyses and sums up external characteristics and extndible extent on heart rot to some species in Daxingan Montains. The heart rot changes for xingan larch are surfaces damaged or damaged marks; Withered bark; rough and uneven stems; as well as bulges. Generally, the size of heart rot is as long as 1.5—2m from the bulge. White birch forest: (1) the heart rots of sprout forest are caused by old tree stumps and can spread under suitable conditions, (2) the heart rots of living stand trees occur mostly at the roots and spread regularly, (3) the heart rotsof high forest only occur at snags and living stand trees which have been frozen to break. Poplar:(1) the heart rots of poplar Suaveolens are leas at the roots of overmature forest; spread as longas 1—3m, (2) there are bulges like nipple and fungus on the surfaces of Poplar davidiana; thesize of rot root is as long as 2—3m; the trunk heart rot spreads long but the area is small.
关键词
树种
心腐
外部特征
白桦
杨树
松
Species
Heart Rot
External characteristics
Extendible Extent
Judge.
