APPARATUS FOR DETERMINATION OF PROPER TREE VIGOR OF CAMPBELL EARLY, AND CULTIVATION METHOD USING THE SAME

摘要

PURPOSE: A tree vigor determining device and a cultivation method of Campbell Early grapes, including use of the tree vigor determining device are provided to facilitate determination of tree vigor right after harvest or during winter pruning. CONSTITUTION: A tree vigor determining device for Campbell Early grapes comprises a groove having a half-moon shape such that a branch can be inserted between a first bud and a second bud of a bearing branch. Determination standards are written on a circular plate of the tree vigor determining device for Campbell Early grapes: 4-6 mm (very weak); cut 1/3 of a main branch, do not prune root; 6-8 mm (weak); constantly manage practices, constantly manage leaves; 8-10 mm (normal); normally manage vines, maintain an appropriate amount of fruit setting; 10-12 mm (strong); concern of flower falling phenomenon occurrence, perform selective thinning; 12 mm or greater (very strong); and flower falling phenomenon occurs, perform thinning on an entire area. [Reference numerals] (AA) 4-6 mm very weak; (BB) 6-8 mm weak; (CC) 8-10 mm normal; (DD) 10-12 mm Strong; (EE) 12 mm or greater very strong; (FF) Need to be determined