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引言杨树是我区造林的主要树种之一。它不仅具有速生、适应性强、用途广、工艺价值高等特点,而且通过杂交易于产生新品种和定向培育。为了培育适合我区生长的优良杨树杂种,我们进行了速生、抗旱、抗盐、耐寒杨树杂种的优良单株选育。从1973年以来通过人工有性杂交,培育与选择以及区域试验,从我院杂交成功的238个杂交杨组合中,初步选出美×大青山青杨74—2。它的主要特征是,杂交优势显著、速生、容易繁殖、抗病虫力强、耐寒、适应性广。
Introduction Poplar is one of the main tree species afforestation in our area. It is not only fast-growing, adaptable, widely used, high value of the characteristics of the process, and easy to produce new varieties through hybrids and directional cultivation. In order to cultivate good poplar hybrids suitable for the growth of our region, we carried out the excellent single plant breeding of fast-growing, drought-resistant, salt-resistant and cold-tolerant poplar hybrids. Since 1973, artificial hybridization, breeding and selection as well as regional experiments, from the hybridization of 238 cross-hybrid in our hospital, initially selected the United States × Daqing Shan Qing Yang 74-2. Its main feature is significant hybrid advantages, fast-growing, easy breeding, strong resistance to pests and diseases, cold, wide adaptability.