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目前我县黄泛平原区已大面积推广Ⅰ—214、69、72杨树新品系,但还不能满足生产上的需要,有必要继续进行国外种源引种试验,以筛选出适合我县生长的更优良的杨树无性系。为此,我们于1985年采用了中国林科院林研所提供的引自美国的美洲黑杨18个无性系进行了苗期试验。试验地设在铜山县砂塘果园,一年结果表明,南方型w系号生长良好,苗干通直,叶大色深,生长期长,比较耐寒,对病虫害有一定的抗性。尤其是
At present, the county Huangpu plain area has a large area to promote Ⅰ-214,69,72 new poplar lines, but still can not meet the production needs, it is necessary to continue the introduction of foreign provenance test to filter out the growth for my county better Poplar clones. To this end, we used in 1985 the Chinese Academy of Forestry Forest Research Institute derived from the United States 18 poplar American Poplar seedling test. The test was conducted in Tongshan County sand pond orchard. One year’s results show that the southern type w system grows well, the seedlings are dry and straight, the leaves are dark in color and long in growth period, more resistant to cold and have certain resistance to pests and diseases. especially