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A Treebog is a form of waterless, earth closet dry toilet which can have a wide range of species - both trees and wetland marginal plants planted around it. The main requirement is that the planted species should be nutrient "hungry" and ideally be harvestable too - thus willow cultivars which can be used as a coppice crop for wands ideal to use. If left unmanaged a Treebog will soon be surrounded by weed species such as nettles but a little management and conscious planting can create a fertile and productive 'bog garden'. Apart from willow coppice, soft fruit such as black currants and sweet smelling herbs like mint will thrive around a Treebog. Both the solids and liquids are deposited within the Treebog base where the solids compost and the liquids soak through the soil and its associated dense rootzone where the nitrogen is rapidly absorbed and metabolised by the mycorhyzal species. The faeces are contained within the Treebog base which is well ventilated to allow aerobic decomposition to occur, the mineralised material feeding the trees around it. Effectively, it is a system for converting urine and fæces to biomass without the need to handle this material. ==History== The term Treebog was first coined Jay Abrahams of Biologic Design and the Treebog can be considered an example of permaculture design. The treebog is a simple method of composting wastes, and since its introduction in 1995 over 1500 Treebogs have been built in Britain. They have been on sites ranging from fruit farms and pick-your-own enterprises, campsites and an angling lake to annual festival sites, remote/low impact dwellings holiday cottages, allotments and church yards where there is no mains water supply. The Treebog has attracted the attention of NGOs and aid workers who hope to develop its potential for shanty towns or refugee camps - anywhere that water is scarce and the population pressure on resources is high. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Tree bog」の詳細全文を読む スポンサード リンク
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