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将苗期试验筛选出的１２ 个杂交新品种， 分别在贵阳中山地区和毕节高寒山区进行多因子造林试验。结果表明： 以美洲黑杨种内杂交的中驻１ 号等４ 个新品种适应性最强， 生长迅速，宜在南方各地发展；种间杂交ＮＬ—２０５ 遗传欧洲黑杨耐大寒旱的优良性状； 派间杂交的品种密度大， 木材用途多样， ＮＬ—１０５ 对水泡性溃疡病表现高抗， ＮＬ—１０６ 对环境的同化能力强， 这些新品种可根据立地条件和目的选择推广。在条件好的地方，可采取４０００株／６６７ｍ ２ 的大密度，超短轮伐期２～３年， 干生物量２１ ｔ／ｈｍ ２ 以上； 一般山地采取４４４ 株／６６７ｍ ２， 集约经营２～３ 代； 生物量１７ ｔ／ｈｍ ２ 以上； 中短轮伐期４～８ 年， 密度２２２株～３００ 株／６６７ｍ ２， ４年生干生物量１２～１８ ｔ／ｈｍ ２，可经营３～４代。用Ⅰ、Ⅱ级苗造林， 成活率在９８％ 以上， 材积生长量为Ⅲ等苗造林的２～４倍以上。配方施肥Ｎ∶Ｐ∶Ｋ＝ ２∶１∶１ （０．５） 能提高生物量， 采取林纸结合， 林下间作复合经营是山区发展纸浆林的有效途径， 可提高生态、经济、社会效益。
Twelve new hybrids screened from the seedling stage test were used to carry out multi-factor afforestation experiments in Zhongshan, Guiyang and alpine areas in Bijie. The results showed that the four new varieties, Zhongzhu 1, which breed in Populus tomentosa, were the most adaptable and rapidly growing, and should be developed all over the South. The interspecific cross between NL-205 and Populus tomentosa . The density of crossbreed hybrids and the diversity of wood use, NL-105 showed high resistance to vesicular ulcer disease and NL-106 had strong assimilation ability to the environment. These new varieties could be popularized according to site conditions and purposes. Good conditions can be 4000 / 667m 2 density, ultra-short rotation period of 2 to 3 years, dry biomass 21 t / hm 2 above; general mountain to take 444 / 667m 2, intensive management of 2 ~ 3 generations; biomass is more than 17 t / hm 2; medium-short rotations are 4 ~ 8 years, density is 222 ~ 300 plants / 667m 2, annual 4-year dry biomass is 12 ~ 18 t / hm 2, generation. With Ⅰ, Ⅱ seedling afforestation, the survival rate of more than 98%, the volume growth of Ⅲ and other seedlings afforestation 2 to 4 times more. The formula fertilization N:P:K = 2:1:1 (0.5) can improve the biomass, take the combination of forestry and paper, the inter-submerged complex management is an effective way to develop the pulp forest in mountainous area, which can improve the ecological, economic and social benefits .