论文部分内容阅读
我省新植的山楂树约占山楂总株数的80%以上。由于这些山楂幼树栽植密度较大,生长旺盛,因此,成树后就应注意整形修剪。山楂苗定植当时,在距地面60~80厘米处剪截定干。定干的当年,整形带(上端20厘米)就可发出几个枝条。冬季修剪时,在整形带顶端选一直立强壮枝作为中心领导枝,并在其饱满芽处剪截。剪口下留内侧芽。在中心枝下面选留3个方向好、分布均匀、角度开张的粗壮枝,作为第一层主枝。这些主枝超过50厘米的,在饱满处剪截,一般剪去1/3~1/4。剪口下顶芽要留外芽,以利开张角度。其它枝条可缓放。
The newly planted hawthorn in our province accounts for more than 80% of the total number of hawthorn. As these hawthorn saplings are planted more densely and grow vigorously, it is necessary to pay attention to plastic pruning after they become trees. Hawthorn seedlings planted at that time, cut off from the ground 60 to 80 cm cut dry. Fixed dry year, plastic belt (20 cm above) can issue several branches. During winter pruning, an upright strong branch is selected at the top of the plastic band as the central leading branch and cut at its full bud. Cut mouth to stay inside the bud. Below the central branch choose to stay in the three directions are good, evenly distributed, the angle of opening thick branches, as the first level of the main branch. These main branches more than 50 cm, cut full in the Department, the general cut 1/3 to 1/4. Cut the top bud to stay outside the bud, to facilitate the opening point of view. Other branches can be slowed down.