论文部分内容阅读
在近年新建苹果园当中,短枝型品种普遍存在上强下弱的现象。1—2年生幼树此现象还不太明显,但进入初果期表现就十分突出。抑上促下,平衡树势,宜早不宜迟,早则见效快,迟则更难控制。 一、骨干枝角度要适中目前短枝型幼龄树的整形修剪,由于偏重于早结果、早丰产、早收益,对下层骨干采取了缓放的方法,使角度加大(80—90度)有些骨干枝在加大角度的同时,基部又受到不同程度的人为伤害,极性生长受到明显的抑制。因此下层骨干枝的角度应调整到60—70度。调整时应尽量减少对骨干枝基部的伤害,尽快恢复下部枝势。树冠上部的骨干枝角度要加大到75—80度。
Among the new apple orchards in recent years, spur-type varieties are generally weak on the strong. 1-2 year-old saplings of this phenomenon is not yet obvious, but the performance of the initial fruit into the very prominent. On the promotion of the next, the balance of the tree potential should not be early sooner, sooner, quick, late is more difficult to control. First, the angle of the backbone of branches to be moderate Currently sprig-shaped young tree pruning, due to emphasis on the early results, early high yield, early return to the lower backbone to take a slow release method, so that the angle increased (80-90 degrees) At the same time of some branches being enlarged, the base was also subjected to various degrees of man-made damage and the polar growth was significantly inhibited. Therefore, the angle of the backbone of the lower branches should be adjusted to 60-70 degrees. Adjustment should be to minimize the damage of the backbone of the branches, as soon as possible to restore the lower branches. The upper branch of the canopy angle to increase to 75-80 degrees.