African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6574

Full Length Research Paper

Nutritional potential of Echinochloa pyramidalis (Lam.) Hitchc. & chase, a forage plant used in constructed wetlands treatment of faecal sludge and wastewater

Marie-Madeleine Ngoutane Pare, Doulaye Koné, Ives Magloire Kengne, Kouassi Dongo and Amougou Akoa
1Laboratory of Plant and Environmental Biotechnologies, University of Yaoundé I, Cameroon. 2Bill and Melinda Gates Foundation, USA. 3Water Operators Partnership (WOP-Africa) and African Water Association (AfWA), 05 BP 1910 Abidjan 05, Cote d'Ivoire. 4Swiss Centre for Scientific Research, P. O. Box 11303 Abidjan 01, Ivory Coast.
Email: [email protected]

  •  Accepted: 13 July 2011
  •  Published: 12 September 2011

Abstract

In Cameroon, Echinochloa pyramidalis used in constructed wetlands as alternative macrophytes revealed an attractive market potentials because of its quality as forage in addition to its pollutant removal capacity. The effects of salinity and the combined effects of salinity and flooding on the nutritional potential of E. pyramidalis under drained and flooded conditions were evaluated after 45 and 100 days of faecal sludge treatment. Leaf and stem samples were analysed for their crude protein (CP) and chemical compositions, especially in terms of cell-wall components while their apparent digestible dry matter (DDM), total digestible nutrients (TDN) and metabolizable energy (ME) were estimated. The results showed that E. pyramidalis is potentially suitable for cattle feeding. Thus, its use on wetland systems provides an opportunity to link sanitation stewardship to animal feed production which may contribute to sustain sanitation infrastructures and development. However, further investigations are necessary to evaluate the digestibility of most nutrients, the harvesting period and the contamination risk of E. pyramidalis grown in such system.

 

Keys words: Constructed wetlands, Echinochloa pyramidalis, flooding, nutritive value, salinity, treatment period.