| The two European Viburnum dilatatun varieties "flash "and" t "from Russia were compared,their ecological habits,breeding methods and cultivation techniques were compared,aiming to screen the superior the European varieties suitable for the Heihe region.The main findings are as follows:(1)" flash" and " t" can adapt to the climate conditions of cold winter in the north of China,and the growth and winter conditions are good,can bear fruit normally.The two European Viburnum dilatatum varieties have strong cold resistance,can live safely through the winter in the Heihe region in winter without soil cold-proof Two varieties have strong resistance to disease,basically no disease occurs;Two varieties of resistance to ability is strong,in the absence of spraying agents,there are a small number of aphids,Tetranychus viennensis Zacher occur,cypermethrin and other pesticides can be prevented.(2)yeyakai fangqi of Viburnum dilatatum in late April,leaf-expansion period in mid-may,flowering in late June and fruiting 8-9 months.The phenological phase of chicken article and " flash" are consistent,and the phenological index of " t" is about about a week after the Viburnum dilatatum and flash of chicken.The shengqi of European pods is generally from early may to early August.In the high growth."t"growth of the largest,followed by flash,the smallest is chicken tree;In the radial growth,the flash growth maximum;followed by the chicken tree,the smallest is "t"(3)twig can be propagated by softwood cutting.European hardwood cutting rooting is easy,under the substrate conditions of humus soil and Xihe River(1:1),the survival rate can reach more than 90%,and the number of lateral roots is the most,the lateral roots are longer and grow well. |
