TITLE:
Evaluation of Growth Rate of Invasive Aquatic Macrophytes and Contribution to Its Use in Organic Fertilizer Production: A Case of Eicchornia crassipes (Mart.) Solms, 1883 in the Lobé Creek (Littoral-Cameroon)
AUTHORS:
Roland Didier Nwamo, Gordon Nwutih Ajonina, Tapite Chanel Yamkou Kopmou, Thomas Efole Ewoukem, Minette Tomedi Eyango
KEYWORDS:
Eichhornia crassipes, Lobé Creek, Anthropogenic Actions, Physico-Chemical Environment, Growth Rate, Chemical Composition
JOURNAL NAME:
Open Journal of Ecology,
Vol.14 No.7,
July
26,
2024
ABSTRACT: From 20 January to 20 July 2023, a study was carried out on the Lobé Creek, a waterway subject to considerable natural and man-made pressures, with a negative impact on its biodiversity and habitats. The aim was to evaluate the growth rate of invasive aquatic macrophytes and their contribution to the use of organic fertilisers: a case of Eicchornia crassipes (Mart.) Solms, 1883 in the Lobé Creek (Littoral-Cameroon) with a view to its appropriate use in agronomy. The specific objective was to examine the impact of anthropogenic actions on Lobé Creek, characterise physico-chemical environment of the study area, and evaluate the growth rate of E. crassipes and its chemical composition with a view to producing an organic biofertiliser. The results show that E. crassipes represents a considerable threat to the populations of these localities. As for the physico-chemical parameters, the temperature values vary from 24 ± 1.41˚C to 26.5 ± 1.13˚C; pH from 6.3 ± 0.1 to 7.2 ± 0.07; conductivity and dissolved oxygen vary respectively from 40.7 ± 1.83 µS/cm to 19.6 ± 3.11 µS/cm and from 7.3 ± 0.14 mg/l to 5.8 ± 1.55 mg/l. Its average growth rate varies from 0.69 feet/day to 0.63 feet/day. With regard to the nitrogen, phosphorus and potassium content of water hyacinth plants, the results show that the average total nitrogen content ranges from 6.11 ± 1.59 g/kg to 5.2 ± 2.03 g/kg; total phosphorus, from 0.52 ± 0.54 g/kg to 0.88 ± 0.38 g/kg; and potassium, from 1.43 ± 0.45 g/kg to 2.61 ± 0.89 g/kg.