篱架巨峰葡萄的主蔓屯土坐地更新法巨峰葡萄定植５－６年后，长势渐趋衰弱，结果部位严重上移，架面下部７０－８０厘米的有效空间已难于利用，对生产不利。为此，笔者于１９９１年对其实施了主蔓屯土更新技术，取得了较为理想的结果。葡萄主蔓屯土更新技术要点为：于夏天... After 5 to 6 years of colonization of the Kovan grape, the growing area is getting weaker and the site of the result is seriously moved upward. The effective space of 70-80 cm in the lower part of the frame is hard to be utilized and unfavorable to the production. To this end, I carried out in 1991 on its main Tuzeng Tu update technology, and achieved satisfactory results. Main vine manure grapes update technology points: in the summer ...