Studies on Biomass Yield from Echinochloa pyramidalis, E. crus-pavonis and Leersia hexandra in Yard-Scale Surface Flow Wetlands in Cameroon
Journal Title: Universal Journal of Environmental Research and Technology - Year 2011, Vol 1, Issue 4
Abstract
In this work, yard-scale horizontal surface flow constructed wetlands were fed with primarily treated domestic wastewater to assess the growth of and biomass production from Echinochloa pyramidalis, E. cruspavonis and Leersia hexandra. The loading rate of about 85 liters per m2 per day was applied to each wetland for two consecutive years. Growth parameters including plant density, height of plants, diameter of stems and leaf dimensions were measured after every two weeks. The aerial parts of the plants were harvested and weighed after each season. Total biomasses ranging from 113 to 154 tons/hectare/year were estimated for E. pyramidalis, while for E. crus-pavonis and Leersia hexandra they were estimated to range from 74 to 79 tons/hectare/year and from 61 to 64 tons/hectare/year respectively. The biomass yield of E. pyramidalis was significantly higher than those of E. crus-pavonis and Leersia hexandra. In addition more biomasses were produced in the dry seasons than in the rainy seasons. The growth and biomass yields were significantly influenced by the seasons and temperature.
Authors and Affiliations
Lekeufack Martin, Fonkou Th�ophile, Ivo Balock Sako, Pamo Etienne and Amougou Akoa
Keywords
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