27 Mar Extensive Cultivation Ma Gement in Wet-fallow Paddy Fields on the Tama Hills
Abstract
English Abstract
In this study, we investigated the most suitable extensive cultivation ma gement cycle for conserving floral diversity in a fallow paddy field. The following three studies were made for this purpose:(1) review of the examples of paddy restoration (2) vegetation survey of fallow paddy fields and (3) rhizome study of Phragmites australis. The paddy restoration works involve those aboveground and underground i.e. mowing and plowing. The following two types of plants were found to interfere with mowing: tall-stem plants (e.g. Phragmites australis and Miscanthus sacchariflorus) and rhizome and erect-stem plants (e.g. Isachne globosa and Leersia sayanuka). These plants increased greatly during the second year in fallow. In plowing, plants with strong and long rhizome (e.g. P. australis and M. sacchariflorus) were found to interfere. The weight of their rhizome increased greatly during the forth year in fallow. Plowing is four-times laborious compared to mowing in restoration work. Therefore it is suggested that cultivation of once every four years is effective in restoration from the labor point of view.
Article Information
Title (non-english): 多摩丘陵の湿性休耕田における農的粗放管理についてCountry: Japan
Language: Japanese
Year: 2002
Study Design: After
Authors: Susumu YAMADA// Yoshiko KITAGAWA// Kazuhiko TAKEUCHI
Journal: Journal of The Japanese Institute of Landscape Architecture
Volume: 65
Issue: 4
Pages: 290-293
City/state or province/country: Ka gawa prefecture and Tokyo prefecture, Japan