一、树形波兰,地理纬度较高,夏季阴雨、寡照。乔砧稀植苹果,生产上普遍采用的树形,是一种近乎伞状的开心自然形。近年来,随着矮砧、半矮砧密植苹果的发展,又提出篱壁形和纺锤灌木形,并在大面积生产中开始应用。下面将各树形的结构特点,和整形方法作一概述。(一)自然形属圆形高大树冠.干高,老果园为1.5～2.0米,这样便于行间 First, the tree Poland, higher latitude, rainy summer, widowed. Joe anvil thinly planted apples, tree commonly used in production, is a kind of almost umbrella-like natural shape. In recent years, with the development of dwarf anvil and semi-dwarf anvil close-planting apple, the wall shape of the fence and the shape of the spindle shrub are also put forward and started to be applied in the large-scale production. Below the structure characteristics of each tree, and shaping methods for an overview. (A) natural shape is a tall circular crown. Dry high, the old orchard 1.5 to 2.0 meters, so easy to line