The effect of rooting zone restriction and pinching the shoot on growth and fruit quality of European grape [Vitis vinifera]
2005
Terakado, I.(Ibaraki-ken. Horticultural Research Inst., Iwama (Japan)) | Ebashi, K.
The effect of the rooting zone restriction and pinching the shoot on European grape for growth and fruit quality was examined. 1. After the root cutting and the root restriction by the soil dressing for European grape that was planted in even ground, the fine roots in the surface layer increased and berry enlargement was stimulated. 2. As the pinching position approached the bunch, the berry enlargement was stimulated. When the lateral shoot of the node from the bunch to the tip was made to be 1 leaf and the lateral shoot of the node from the bunch , to the base was made to be 5 leafs, berry enlargement was stimulated. 3. As the pinching position approached the bunch, the dry matter rate of the fruit increased and the efficiency of the fruit production was heightened. 4. The leaf area changed with the pinching position. Pinching at I leaf for the lateral shoot from the bunch to the tip of the shoot increased the leaf area of the lateral shoot of the node from the bunch to the base by more than 2 leaves. 5. The sugar which was found the most in the shoot was sucrose. Pinching the 5th-nodes from the bunch increased the starch and sucrose content better than the bunch position pinching. These results suggested that a combination of rooting zone restriction and pinching on European grape could heighten the efficiency of the fruit production and produce high-quality fruit.
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