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河北杨在我旗零星分布较广。长期以来,由于繁殖困难,使这一树种的推广受到限制。为了解决河北杨的繁殖问题,我圃从1979—1982年四年里对河北杨进行了各种方法的繁殖试验。近两年来摸索出一些新的繁殖技术,使河北杨的繁殖成活率有了显著提高。一、清水浸条蘸萘乙酸泥浆扦插塑料地膜覆盖法我圃对插穗经过浸水5、6、7、8天,分别蘸500ppm的萘乙酸泥浆扦插,平均生根成活率57.3％,其中浸水6天的生根成活率高达84.2％(见表1)。
Hebei Yang scattered in my flag sporadic. For a long time, promotion of this tree species has been limited due to breeding difficulties. In order to solve the breeding problem of poplar in Hebei Province, we conducted various kinds of breeding experiments on Hebei poplar from 1979 to 1982. In the past two years to explore some new breeding techniques, Hebei poplar breeding survival rate has been significantly improved. I. Water immersion dipped in naphthalene acetic acid cuttings plastic film mulching I nursery on the cuttings after soaking 5,6,7,8 days were dipped 500ppm naphthalene acetic acid mud cutting, the average rooting survival rate of 57.3%, of which 6 days of soaking Rooting survival rate as high as 84.2% (see Table 1).