An Ecological Study on Management of Pleioblastus chino var. viridis Type Floor in Recreation Fosest

Abstract

Pleioblastus chino var. viridis often occurs in wood-lands or grasslands on hills or mountainsides in Kansai district, like P. chino in Kanto district. Both grow over 2 meters tall, and are very resilient to physical damage. With repeated weeding, it is possible to reduce their height and to get the fine and dence floor dominant with these Pleioblastus. The purpose in this paper is to ascertain the above mentioned effective weeding interval for P. chino var. viridis in forest floor for recreational use. Experimental work was conducted over a six-year term in deciduous oak woods in Sakai city, Osaka prefecture. The results are as follows: Not only Pleioblastus (chino var. viridis) but also the other plants were reduced by semiannual weeding. On the other hand biennial and triennial weeding plots in the dark section were covered dominantly with Pleioblastus. But Pleioblastus was oppressed by overtopped shrubs at the same interval weedings in the light section, whereas shrubby growth was controled in the dark section. Pleioblastus showed the preferable regrowth by annual weeding in both light and dark sections. In order to make Pleioblastus somewhat lower and to control vigorous regrowth of the other plants in light condition, it is considered to be necessary to carry on annual weeding in the late spring or early summer.