J172等5个柳树良种育苗试验

Test of Cuttages Seedling on Five Species of Willow

通过对5个柳树良种在不同类型区的扦插育苗试验,分析苗木生长量、生长季土壤含水量、土壤温度,结果表明:①各参试因素对生长量影响的程度依次为品种(系)>类型区>覆膜>扦插方法,因此在柳树壮苗培育中,应首先考虑优良品种的选择。②在不同类型区内,影响树木生长的主导生态因子亦不同。在高寒湿润区,热量是影响生长量的主导生态因子,故其覆用地膜的效果十分显著,其生长量较对照提高28.6%;在川塬区,土壤水肥是影响生长量的主导生态因子,故其覆用地膜的效果不太显著,应着重加强土壤水肥管理。

Test has been done with 5 species of superior willow in different type area through cottages seedling: after analysis of amount of growth, soil moisture in growth season, soil temperature, the results showed that:① The influence sequence on the amount of growth is: species >type region >peritoneum>way of cuttage; so in the cuttage test, the first factor is select superior species. ② In the different type area, the ecological factor which influence the growth of tree is different too. In cold and humid area, the quantity of heat is the main ecological factor which influence the growth of seedling. So in this area, the effect of peritoneum on growth is significant, with the increase growth percentage of 28.6% to CK; In plateau area, the fertility and water concentration of soil are the main ecological factors. The effect of peritoneum was not significant, but enforce. the govern of water and fertilization.