The effect of different degree of shoot training by lowering primary scaffold branch on the growth of grape [Vitis vinifera] 'Pione' and labor hours for the training
2007
Fujii, Y.(Okayama-ken. Agricultural Experiment Station, Sanyo (Japan)) | Ono, T. | Yasui, T.
The effect of different degrees of shoot training on the shoot growth, fruit set, size of flower, fruit quality of Grape 'Pione' and labor hours for the training were investigated in 2005, 2006. Four different angles are set, such as 0 deg (control), 14 deg, 27 deg, 45 deg by lowering the primary scaffold branch; 0, 10, 20, 40cm each. As the degree of shoot training was larger, the labor hours for the training was shorter because the number of shoots needed to be twist for attaching to the training line were fewer. About 30% of the labor hours are saved in 14 deg treatment compared to that of the 0 deg treatment as control. Nevertheless, there was no difference in the shoot growth, size of flower, fruit set and fruit quality among the treatments, the growth of the lateral shoots was significantly larger as the degree was larger. These results show that about 14 deg is desirable among the treatment for labor-saving and culture practice of vigorous grapevines in the authentic trellis system in Okayama prefecture.
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