大叶山杨引种育苗试验研究

大叶山杨是吉林市林科所从长白山地区的山杨种群中选育出来的优良变种，该树种上具有生长迅速、成材早、耐寒、耐瘠簿、适宜地山地生长等优良特性。阜新地区为了丰富山地造要的树种资源，进行了引种育苗试验。结果表明，１年生播种苗和２年生移植苗均表现出原产地原种的优良特性，１年生苗高和地径分别比省标高出８０％和５３％，苗木合格率达９４％；１年生苗总干重大于标准４０．３％，根茎的干重比达１．５６，比一般苗木高出４２

RESEARCH ON INTRODUCTION AND SEEDLING CULTIVATING EXPERIMENTS OF POPULUS DAVIDIANA VAR.MACROPHYLLA

Populus davidiana var.Macrophyllawas a fine variety selected and cultivated from Populus davidiana population in Changbaishan areas by Jilin city forestry institute.This tree species had fast growing,earlier lumber,cold and poor soil resistance,suitable to be grown in mountain lands and other characteristics.In order to enrich tree species resources of afforestation in mountain lands of Fuxin,introduction and seedling cultivation experiments were carried out.The results indicated that both 1a sowing seedlings and 2a transplants showed the characteristics of original place and trees.The height and ground diameter were 80% and 53% higher than provincial standard,respectively.The qualified rate of seedlings reached 94%,the total dry weight of 1a seedling was 40.3%higher than the standard,the dry weight ratio of root shoot was 1.56 and 42% higher than that of common seedlings.This tree species had strong adaptability to different soil types,but grew differently on different soils and best on sand loam especially.