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Istituto Agronomico Mediterraneo di Bari (IAMB) 2021

The potential of frass derived from the rearing of Tenebrio molitor as a fertilizer for organic horticulture

Farag, Dalia Hosameldin Mahmoud Ahmed

Titre : The potential of frass derived from the rearing of Tenebrio molitor as a fertilizer for organic horticulture

Auteur : Farag, Dalia Hosameldin Mahmoud Ahmed

Etablissement de soutenance : Istituto Agronomico Mediterraneo di Bari (IAMB) - Centre international de hautes études agronomiques méditerranéennes (CIHEAM)

Grade : Master of science : Mediterranean organic agriculture 2021

Résumé
The industrial rearing of insects as food and feed can lead to massive amounts of frass production. This study aimed to valorize the Tenebrio molitor frass, as fertilizer in organic horticulture. Four experiments were implemented. In the first two experiments, the amount of frass produced and the impact of the feeding diet on frass nutrient content were evaluated. In the third experiment, a pot trial was implemented to test the effect of frass on green pepper and basil plant growth performance. In the fourth experiment, the frass aqueous extract effect was tested on seed germination. Results showed that 1.4kg of frass was produced per 1kg of collected larvae. The composition of the tested diets mainly influenced the potassium content of the frass. In fact, diets with date seed powder showed significantly lower potassium content. Application of frass on peppers generally provided better results (SPAD, height, leaf area index, fruit weight) than compost and urea, with the same nitrogen dose. However, all frass treatments on basil gave the highest results only in fresh weight and oil content. Potentially, the frass aqueous extract can promote the early development of seedlings. Therefore, the frass represents a promising fertilizer for organic horticulture.

Présentation (IAMB Library)

Page publiée le 30 mars 2022