Abstract
We investigated the effects of topsoil dressing, activated carbon, and activated carbon flow on the mitigation of replant failure of Japanese pear (Pyrus pyrifolia (Burm.f.) Nakai) by growing young trees of ‘Kosui’ for two years. Shoot growth was greater in trees planted in a field treated with topsoil dressing than in trees in a non-treated field (control) both at one and two years. The mean weight of trees in the topsoil-dressing field was 170% greater than that of the control at two years. There was no significant difference in growth between trees in an activated carbon or activated carbon flow field and the control. We also compared shoot growth between the trees in a field treated with topsoil dressing along with polyethylene film mulching and those in a field treated with topsoil dressing alone. Both at one and two years, shoot growth was greater in trees in the field treated with topsoil dressing and mulching than in the trees in the field treated with topsoil dressing alone. In conclusion, topsoil dressing has a positive effect on the mitigation of replant failure in young trees. The combination with mulching further promoted the growth of young trees.
