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大叶山杨(Populss davidiana var Macrophylla G·L·Zhang)是我们近几年对吉林省林区的山杨广泛调查研究后选出来的新品种。比一般山杨个头大、径级粗,高达30米,胸径40厘米,干形园满通直,出材率高。该品种树形美观,抗性较强,耐腐朽,尤其材质较好,因此木材用途较广。由于过去对杨属不太重视,致使缺乏育苗经验。现将我们几年来的播种育苗方法,简介如下。一、育苗试验地概况试验地选在磐石县苗圃和江南林场,磐石苗圃海拔高320米,年降水量679.5毫米,7月份平均气温22.2℃,最高气温36.1℃,2月平均最低气温-29℃,绝对最低气温-36℃,无
Populss davidiana var Macrophylla G.L. Zhang is a new variety that we have selected after extensive investigation of aspen in the forest area of Jilin Province in recent years. Aspen than the general big head, diameter coarse, up to 30 meters, 40 cm diameter, dry garden full straight, a high yield. The variety of beautiful tree shape, strong resistance, decay resistance, in particular, better material, so a wider use of wood. Due to the past less attention to the genus Yang, resulting in lack of nursery experience. Now we seeding seedling method for several years, is as follows. First, the general situation of nursery test selected in Panshi nursery and Jiangnan Forestry Center, rock nursery 320 meters above sea level, the annual rainfall of 679.5 mm, July average temperature of 22.2 ℃, the highest temperature of 36.1 ℃, February average minimum temperature of -29 ℃ , The absolute minimum temperature of -36 ℃, none