Toilet compost and human urine used in agriculture: fertilizer value assessment and effect on cultivated soil properties

Sangare D., Sou/Dakoure M., Hijikata N., Lahmar Rabah, Yacouba Hamma, Coulibaly L., Funamizu N.. 2015. Toilet compost and human urine used in agriculture: fertilizer value assessment and effect on cultivated soil properties. Environmental Technology, 36 (10) : 1291-1298.

Quartile : Q3, Sujet : ENVIRONMENTAL SCIENCES

Résumé : Toilet compost (TC) and human urine are among natural fertilizers, which raise interest due to their double advantages to combine sanitation and nutrient recovery. However, combination of urine and TC is not so spread probably because the best ratio (urine/TC) is still an issue and urine effect on soil chemical properties remains poorly documented. This study aims to determine the best ratio of urine and TC in okra cultivation, by targeting higher fertilization effect combined with lower impact on soil chemical properties. Based on Nitrogen requirement of okra, seven treatments were compared: (T0) no fertilizer, (T1) chemical fertilizer (NPK: 14-23-14), (T2) 100% urine, (T3) 100% TC, (T4) ratio of 75% urine + 25% TC, (T5) 50% urine + 50% TC and (T6) 25% urine + 75% TC. Results indicated that T4 (75% urine + 25% TC) gave the highest plant height and yield. In contrast, T2 (100% urine) gave the lowest results among all treatments, indicating toxicity effects on plant growth and associated final yield. Such toxicity is confirmed by soil chemical properties at T2 with soil acidification and significant increase in soil salinity. In contrast, application of urine together with TC mitigates soil acidification and salinity, highlighting the efficiency of urine and TC combination on soil chemical properties. However, further investigation is necessary to refine better urine/TC ratio for okra production.

Mots-clés Agrovoc : urine, fèces, genre humain, compostage, engrais, recyclage des déchets, utilisation des déchets, propriété physicochimique du sol, biofertilisant, compost, Abelmoschus esculentus, organisme indicateur, teneur en azote

Mots-clés géographiques Agrovoc : Burkina Faso

Classification Agris : F04 - Fertilisation
000 - Autres thèmes
P33 - Chimie et physique du sol

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

Auteurs et affiliations

• Sangare D., International Institute for Water and Environmental Engineering (BFA)
• Sou/Dakoure M., International Institute for Water and Environmental Engineering (BFA)
• Hijikata N., International Institute for Water and Environmental Engineering (BFA)
• Lahmar Rabah, CIRAD-PERSYST-UPR AIDA (TUN) ORCID: 0000-0002-7242-8423
• Yacouba Hamma, International Institute for Water and Environmental Engineering (BFA)
• Coulibaly L., International Institute for Water and Environmental Engineering (BFA)
• Funamizu N., Hokkaido University (JPN)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/579192/)

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