Joint V-shaped trellis for the cultivation of early, labor-effective, and high yielding Japanese persimmon
The conventional cultivation methods for Japanese persimmon involve two difficult problems: the trees become too tall and take over 10 years before bearing sufficient yield. Therefore, we developed a joint V-shaped trellis (JV) with the aim of establishing a cultivation method for Japanese persimmon that allows for an early, labor-effective, and high yield. The JV were planted with 1 m space between the plants and 4 m between the rows. The main branches were joined at a height of 60 cm at the same time as planting, and the side branches were arranged at an elevation angle of 60°. Soshu, Taishuu, and Fuyu Japanese persimmon were tested. The results showed that compared to the conventional open center natural form, the cumulative yield of JV from the 3rd to 6th years after planting was significantly higher. In addition, the working time per hectare for the main tasks of persimmon cultivation, such as bud thinning, fruit thinning, harvesting, and pruning, was shorter in JV. Furthermore, the proportion of AC3 or more in the workers based on the Ovako Working Posture Analyzing System and the surface myoelectric potential during harvesting was also found to be lower for JV. These results suggest that JV is a cultivation method that enables early yield and is less burdensome for Japanese persimmon workers.
Asakuma, H. and Takemura, C. (2022). Joint V-shaped trellis for the cultivation of early, labor-effective, and high yielding Japanese persimmon. Acta Hortic. 1338, 191-196
high density planting, low tree-height cultivation reduced work time, V-shaped training