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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 summarizes and analyzes the external characteristics and extension degree of some species in Daxinganling area. It is concluded that the external characteristics of Larch heartwood are the appearance of damaged or broken traces, dry bark, uneven trunk, Corruption generally extend 1.5-2m away from the drum kits. Betula platyphylla: (1) The heart rot of the sprouting forest is caused by the old tree pier, and the decay will spread when the condition is favorable; (2) Most of the heart rot of the living wood is at the root and its extension degree is regular; (3) Live on the wood. Poplar: ① sweet-Yang heart rot occurs in the root of a few over-mature forest, extending 1-3m; ② Yang Yang heart-shaped external features are nipple-shaped bulge, the body surface of a bacteria, 3m, the heart of the trunk area is small, extending.