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中国山杨(P.davidiana Dode)是我国北方及西南地区广泛分布的一个树种,具有生长迅速,根蘖能力强的特性。我省共有51615ha 中国山杨,占全省森林总面积的5％。分布在海拔1200～2000m 的阴坡或半阴坡。中国山杨易受红心病及心腐病的危害,其危害程度极大,90％的植株受害。因此在现行的林业生产中中国山杨成了残次林的改造对象,林业生产千方百计消灭它,但由于其再生能力强而难以消灭。给生产带来了不利。如何变废为宝,使不利因素变成有利因素,是我们针对中国山杨改造利用的一个研究课题。在1991年和1992年进行了初
P.davidiana Dode is a widely distributed tree species in the north and southwest of China, with rapid growth and strong tillering ability. There are 51615ha Chinese aspen in our province, accounting for 5% of the total forest area in the province. Distribution at an elevation of 1200 ~ 2000m shady or semi-shady slope. Populus asiatica susceptible to heart disease and heart disease hazards, the great extent of harm, 90% of the victims of the plant. Therefore, in the current forestry production, the Chinese poplar has become the target of remolding the second-and-second-grade forests. The forestry production has tried its best to eliminate it but is hard to eliminate because of its strong regenerative capacity. To produce a disadvantage. How to turn waste into wealth, so that unfavorable factors into favorable factors, is our research on the transformation and utilization of aspen in a research project. In 1991 and 1992 were the beginning