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黑龙江省牡丹江林区于1974年、1975年开始从白城地区引进白城小黑杨和白城小青黑杨种条30多万根,1975年又引进2年生留根10万根。经过十年的引种栽培试验,这两个品种,在适生和较适生的立地条件下,同人工栽植的乡土树种大青杨、香杨相比较,无论其耐寒性、抗病性还是生长速度,都明显的优于大青杨和香杨以及同时引进的其他杨树品种。一、试验地概况引种试验林设在本林区的林口林业局,栽植于山麓缓坡地与河谷平原,其地理位置为东经
Heilongjiang Mudanjiang Forest District in 1974, from 1975 Baicheng area began to introduce black poplar Baicheng Baicheng and more than 300,000 species of black poplar, in 1975 introduced two years root 100,000. After ten years of introduction and cultivation experiments, the two cultivars, under suitable habitats and more suitable habitats, were better than cultivated native tree species Populus euphratica and Fragrans, regardless of their cold tolerance, disease resistance or growth Speed, are obviously better than the Populus and Yang and other poplar varieties introduced at the same time. I. Overview of the experimental site Introduction The experimental forest was set up in the Linkou Forestry Bureau of this forest area and was planted in the gently sloping land of the foothill and the plain of the valley. Its geographical location is east longitude