【摘要】 研究结果表明,催根加地膜覆盖使楸树埋根育苗的成活率由25%提高到93%,苗高增长58%,地径增长40%,根系总长度增加20%,根系鲜重增加78%,一年生苗出圃率增加48%,且苗木成活、生长与根穗长度、粗度及母树年龄具有一定关系。塑料小棚播种移栽育苗法变二年出圃为一年出圃,每亩播种量由1000—2000克减为30克,一年生苗地径、苗高约增长1—1.7倍,当年出圃率高达94.2%。应用嫁接法培育楸树大苗获良好效果,春季袋接、劈接、带木质方块芽接成活率分别为98%、96%及94%,嫁接时期3月下旬为宜,梓砧嫁接亲和力达95%。更多还原

【Abstract】 The results showed that the Survival percentage of root cutting nursery wasraised from 25% to 93%,by accelerating rooting and covering root with pla-stic film,the height of nursery stock,the diameter at butt end,the overalllength of root system,the fresh weight of root system,and the lifting rateof annual nursery stock increased by 58%,40%,20%,78% End 48%,respec-tively.The survival and the growth of nursery Stock have something to do Wi-th the length,width of the root,and the age of the mother tree.With thenursery method of sowing and transplanting in plastic shed,the lifting periodwas shortened from two years to one year;the sowing norm per mu was red-uced from 2000g to 30g;and the diameter at butt end of annual nursery sto-ck,the height of nursery stock increased about 1—1.7 times,respectively.Thelifting rate amounted to 94.2% in the same year.A good result was obtainedby cultivating big nursery stock of Catalpa bungei with grafting method.Thesurvival percentage of hypodermic grafting,cleft grafting,and block buddingin spring were 98%,96% and 94%,respectively.March was the suitable ti-me for grafting.Catalpa ovata root-stock grafting compatibility reached 95%.更多还原