| Black poplars is one of main species for afforestation and planting high-yielding forest in Shan Dong Plain Area,and it can be the ideal species for realizing oriental cultivation and development of industrial timber.The study was based on grow character, ecological adaptability,form quality index,ability of asexual propagation,insect resistance,stess resistance and wood characteristics of eight poplar clones,distinguished the clones suitable for south southwest northwest of Shandong province tai-yi mountainous and jiaodong through comprehensive analysis according to the principle of matching tree species with site directive breeding varieties forestation high quality and high benefit.The result predicted that:There are significant differences in growth among the clones.Zhonghe 1 grew faster 20%to 40%thanâ… -69.The growth of zhonglin 46,zhonglin 23 and zhonglin 28 were more thanâ… -69 20%of the volume.â… -214 grew slow,it was 62%ofâ… -69 on volume.There are significant differences in tem form.The character of tern form of L35 andâ… -107 are small crown,fine branches,well-distributed,high ratio of height-diameter,small degree of straight tip,meanwhile big crown,thick branches,oblivious layered,thick stem, short,high degree of straight tip are the characters of zhonghe 1 andâ… -214,zhonglin 46, zhonglin 23,zhonglin 28 andâ… -69 are in the middle degree of the character.There are significant differences in survival rate of forestation and seedling-culturing among the clones.The clones which have high survival rate of seedling are L35,â… -107 and zhonglin 46.The clones of L35,â… -107 zhonglin 46 zhonglin 23,zhonglin 28 andâ… -214 have high survival rate of forestation that was above 95%.Cold resistance is one of stress resistance,â… -214,zhonglin 46,zhonglin 28,zhonglin 23,L35 andâ… -107 are in high level,zhonghe 1 andâ… -69 are in the contrary.L35,â… -107, zhonglin 46,zhonglin 28 and zhonglin 23 are in high level of drought resistance,zhonghe 1,â… -214,â… -69 are in low.Wood density as one of wood properties,there are significant different among the clones.It is in higher level inâ… -69,zhonglin 28,zhonglin 23 and L35 follows,zhonghe 1, zhonglin 46 andâ… -214 are in low.L35,â… -107,zhonghe 1,â… -69,zhonglin 28 and zhonglin 23 are suitable to pulp and make paper considering fiber length,length and width ratio,ratio of wall to lumen and fiber content and so on.The clones suitable for different cultivation area.The result showed that L35â… -107 zhonghe 1â… -69 zhonglin 46 and zhonglin 28 were suitable for southwest of shandong province,L-35,â… -107 zhonglin 46,zhonglin 23,â… -69 and zhonghe 1were suitable for northwest of Shandong province,L35â… -107 zhonglin 46 zhonglin 23,zhonglin 28, zhonghe 1,â… -69 and were suitable for tai-yi mountainous,L35,â… -107,zhonghe 1,â… -69, zhonglin 46,zhonglin 23,zhonglin 28 were suible for south of shandong province, L35,â… -107,zhonghe 1,â… -69 zhonglin 23,zhonglin 46 and zhonglin 28 were suitable for jiaodong area.L35 andâ… -107 showed excellent from the characters of growth adaptability and stress resistance and had the character of tall stem,low degree of straight tip,small crown and well-distributed.They were either suitable for forestation,or farmland shelterbelt network in the whole province.Zhonghe 1 andâ… -69 were suitable for the area of warm and moist in the south southwest of shandong province and jiaodong area.As a result of big crown and fast-growing of stem,zhonglin 46 zhonglin 23 and zhonglin 28 were in middle level of growth characteristic and stress resistance.They were suitable for cultivate large diameter stem in the model of sheet forestation mixed cultivate ofâ… -107 and L35.â… -214 was elimination for its low performance of grow characteristic and stress resistance.Timber assortments suitable to cultivate of different clones.L35,zhonghe 1,â… -69,â… -107,zhonglin28 and zhonglin 23 are suitable to pulp and make paper as pulpwood.L35,â… -107,zhonghe 1,â… -69,zhonglin 46,zhonglin 23 are suitable to make plywood as plywood.Zhonglin 23,zhonglin 28,zhonglin46 andâ… -69 are suitable for architecture as architectural species,â… -69,zhonglin 23 and zhonglin 28 are suitable for making furniture as furniturewood.
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