较老的种植材料,如接穗生长达1.5—2年的截干芽接树或2年生的无性系实生树,由于大而笨重,一般认为不易成活,所以,过去在马来亚仅用来作小规模的试种。格拉几里胶园从1956年以来一直种植截干芽接树,在头三年,定植的面积不到100亩,但从1959年起,全部更新面积都采用了较老的 Older planting materials, such as scion trees of 1.5-5 years old with scion growth or 2-year-old clonal trees, are generally considered to be less viable because of their size and weight, and were used only as small Trial planting Gelajili rubber plantation has been planted since 1956 truncated bud tree, in the first three years, less than 100 acres planted area, but since 1959, the total replacement of the area have adopted the older