千葉県白井市における管理形態の異なる草地の植物相

Abstract

This research studied the management situation of different habitats, investigating flora and dividing the grasslands located in Shiroi City, Chiba Prefecture into six habitats (abandoned rice fields, mowed land, sloped, developed land, management -abandoned land, arable and playgrounds). For the species rate of attribute-based classification for each habitat, endangered plants were the most common in mowed land, and were the least common at abandoned rice fields, developed land and arable and playgrounds. Grassland plants were the most common in mowed land, and were the least common in abandoned rice fields. Ruderal plants were over half at 50-60% in all habitats. Exotic plants were the least common in mowed land, and were the most common in developed land. Endangered plants included many species at 17 species for mowed land, and included few species at abandoned rice fields and developed land. In grassland types at each habitat, Miscanthus sinensis and Imperata cylindrical types included many species at mowed land, Zoysia japonica type included many species in arable and playgrounds. With respect to management of each habitat, we found that mowed land and a part of sloped is regularly mowed of about 1-3 times per year, arable and playgrounds are hard mowed over 4 times per year, and in other habitats, although the length of time that has elapsed since abandonment is different, basically, these habitats are abandoned.