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传统的修剪方法在当今世界上仍被广泛采用,树冠下部甚小,上部圆顶状甚大。瑞士泊尔尼园艺学校的汉斯·斯普林教授则认为树冠应呈塔状或圆锥状,树冠下部大,上部渐小成一点。这样树体透光量最大,光合作用最强,大部分果实也将着生于树冠基部的宽阔部位,给果实采摘带来了方便。实践证明斯普林的理论是正确的。不久这种方法在泊尔尼区流行开,接着推广到瑞士其它地
The traditional pruning method is still widely used in today’s world, the lower part of the crown is very small, the top dome-shaped. Professor Hans Springer at the Parkneir Gardening School in Switzerland believes that the crown should be tower-shaped or conical, with the lower part of the crown large and the upper part slightly smaller. This tree is the largest amount of light transmission, the strongest photosynthesis, most of the fruit will also be born in the broad parts of the canopy base, brings fruit picking convenience. Practice has proved that Spring’s theory is correct. Soon after, this method became prevalent in the Parne area and was subsequently extended to other parts of Switzerland