“美国八号”栽后定干高度在100cm,推广纺缍形树体。1树体的修剪1.1一年生树的修剪萌芽前于所定干高度70cm处进行目伤2～3处,提高萌芽率,增加枝量;在枝条木质化前抹除树干70cm以下的嫩梢。夏季对新梢拿枝软化,使之角度在70～90度,特别注意控制竞争枝。1.1.1对长势壮、枝量大、长枝多的幼树冬季修剪要疏除70cm以下的枝条,70cm以上的长枝选留6～8个长势均衡、方位较好的枝条。其中3～4个 “United States on the 8th,” planted dry height of 100cm, to promote spin-shaped tree. 1 tree pruning 1.1 annual tree trimming before the budding at a predetermined dry height of 70cm at 2 to 3 head injuries, increase the rate of germination, increase the amount of branches; before the branches lignification of young stems below 70cm erase. Summer shoot shoots softening, so that the angle of 70 to 90 degrees, with particular attention to control the competition branch. 1.1.1 growing strong, large branches, young branches and more pruning pruning winter to sparse less than 70cm branches, 70cm or more long branches elected to stay 6 to 8 growing equilibrium, better orientation of the branches. Of which 3 to 4