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毛白杨速生、优质、长寿,是我国特有的杨树优良树种。但由于该树种的插穗生根较难,使其发展受到影响。对此问题多年来有关方面进行过一系列的试验研究,有人主张低温越冬窖藏,使毛白杨插穗,在扦插前形成愈伤组织,但不使其发根,此法虽然有助于插穗成活,但因插穗的生根过程要在扦插后大田里进行,受土壤、气候因子的制约,扦插成活率不稳定;近来来各地又采取毛白杨“春季覆盖育秧”的方法,使毛白杨插穗充分生根抽梢后移植,成活率较稳定,但又因在当年苗木生长期较短,难以育成大苗。笔者于1983—1985年针对现存问题,试验了阳畦催根育
Populus quick-growing, high quality, longevity, is our unique poplar tree species. However, due to the species of cuttings rooting more difficult to make its development affected. A series of experimental studies have been carried out on this issue for many years. Some people claim that the cold-wintering clumps store the plucked Populus tomentosa, callus is formed before cutting, but the root is not allowed to grow. Although this method can help cuttings to survive, However, the rooting process of cuttings should be carried out in the fields after cuttings, and the survival rate of cuttings is not stable due to the constraints of soil and climatic factors. In recent years, Populus tomentosa Populus tomentosa After transplanting, the survival rate is more stable, but because of the growing seedling in the short period of time, it is difficult to develop large seedlings. The author in 1983-1985 for the existing problems, Yang Yang test root test