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1972年从意大利引入江苏省的黑杨派无性系Ⅰ—63、Ⅰ—69、Ⅰ—72、Ⅰ—45、Ⅰ—214和加龙生长迅速,特别是Ⅰ—63、Ⅰ—69和Ⅰ—72速生性状最为突出,这充分证明这些无性系适合于我省栽培。但由于这些无性系的地理起源不一致,引种到全国有关各地后,在生长上表现很不一致,为了发挥每一无性系的生产潜力,应根据适地适品种的原则,合理选择其适生的气候范围。杨树生长十分迅速,要求较好的立地条件,由于各地区影响立地条件的土壤因子各不相同,所以在选择杨树造林的立地条件时,应根据各地影响立地条件的主导因子来确定适宜栽培的程度。
The black climatic succession of Ⅰ-63, Ⅰ-69, Ⅰ-72, Ⅰ-45, Ⅰ-214 and Garonen introduced from Italy to Jiangsu Province in 1972 was rapid, especially Ⅰ-63, Ⅰ-69 and Ⅰ- 72 fast-growing traits the most prominent, which fully proved that these clones suitable for cultivation in our province. However, due to the geographical origin of these clones is not consistent, the introduction of the various parts of the country after the performance of very inconsistent growth, in order to play each clonal potential of production, should be based on the principle of suitable varieties, a reasonable choice of its suitable climate range. Poplar growth is very rapid, require better site conditions, due to the impact of site conditions of different soil factors in different regions, so in the selection of poplar afforestation site conditions, should be based on the dominant site factors affecting the site to determine the appropriate cultivation Degree.