Comprehensive treatment and analysis of Fishpond sediments as a source of organic fertilizers

Résumé : Agricultural fertilizers are essential to enhance proper growth and crop yield. Chemical fertilizers endanger ecosystems, soil, plants, and animal and human lives. This has increased interest in biofertilizers which are products that contain living microorganisms or natural compounds derived from organisms such as bacteria, fungi, and algae that improve soil chemical and biological properties, stimulate plant growth and restore soil fertility. This study aimed to use natural coagulants in the management of fishpond sediment for the potential recovery of nutrients that can be utilized in crop production as organic fertilizers. Fishpond wastewater and sediment were collected, treated with natural, powdered Moringa oleifera seed coagulant, and dried. Greenhouse evaluation of the dried sediment was carried out using maize seeds on soil primed with the sediment. Growth parameters such as plant height, leaf length, root length, plant weight, and percentage yield were determined. The nitrate, total nitrogen, phosphate, and total phosphorus content of the organic fertilizer were also determined. Plant height in maize showed a 35.8-44.4 % increase in fertilized maize and a 20.3-39.3 % increase in the leaf length. There was a 38.8-66 % increase in root length and a 23.9-36.5 % increase in plant weight in fertilized maize. The nutritive component was 59.80 mg/Kg, 655.56 mg/Kg, 103.87 mg/Kg, and 426.60 mg/Kg respectively. For a period of 21 days of active growth, the growth rate of maize primed with organic fertilizer was 0.93 cm/day with a total yield of 100 % while the control was 0.68 cm/day with a total yield of 50 %. A dried biofertilizer that can improve plant growth, weight, and percentage yield without having to deal with smelly manure looks promising and seems to be a better alternative to explore in agriculture.