To provide a main skeleton structure of a grape shelf and a method of regulating its main trunk which can increase the number of overhead work, increase the number of sideways work, run a work vehicle between furrows, make the amount and quality of work and production efficient, provide.SOLUTION: In the row of the support columns 1 planted in the front-rear direction, the front-to-back pipe 2 is installed in the front-rear direction at the middle of the column height, and at the arbitrary position of the front-rear passing pipe of the column row arranged in two rows, The left and right ends of the chevron type branch pipe 3 are installed in the back and forth through pipe, and the lower ground of the mountain branch installation point of one of the left and right support column rows parallel to the main skeleton structure of the grape shelves using the Yamagata branch pipe , And attracts the first main trunk 6 of the grape which has stood up to the mountain portion of the Yamagata branch pipe and attaches the second main trunk branched in the left and right lateral direction from the vicinity of the tip of the first main trunk to the lower oblique The backbone trunk branch method which attracts the main branch in the back and forth direction near the tip of the second main trunk by the back and forth through pipe.(FIG.【課題】頭上作業を減らし横向き作業を増やし、畝間に作業車を走らせ、作業と生産の量や質が効率の良い圃場にすることができるブドウ棚の主要な骨格構造とその主幹の整枝方法を提供する。【解決手段】前後方向に建植した支柱1の列において、支柱高の中頃の前後方向に前後通し管2を設置し、二列に並列した支柱列の前後通し管の任意の箇所に、ペアの山形支管3の左右先端を前後通し管に設置することを特徴とする山形支管を使用したブドウ棚の主要骨格構造と並列した左右支柱列のうち一方の支柱列の山形支管設置箇所の下部地上にブドウを植生し、立ち上がったブドウの第一主幹6を山形支管の山部まで誘引し、該第一主幹の先端付近から左右横方向に分岐した第二主幹をペア側の山形支管の斜め下方の前後通し管まで誘引し、前後通し管にて第二主幹の先端付近を前後方向に主枝を分岐誘引するブドウの主幹整枝方法。【選択図】図1
