fertilisation en bassin de grossissement de crevettes peneides: utilisation d’engrais organique liquide (e.o.l) bio a base de farine de plume et farine de viande » Cas de la société L.G.A OSO FARMING Ambilobe.

Abstract

Fertilization in penaeid shrimp’s grow-out ponds: Use of Liquid Organic
Fertilizer (L.O.F) Bio made of feather meal and meat meal.
This study was carried out within the company OSO FARMING LGA Ambilobe for
7 months from May to November 2015. The objective is to optimize the release rate of the
mineral elements that the breeding environment would have need. Based on this idea, we
carried out a series of 3 steps experiments to determine the most efficient mixing dose and
played on the N / P ratio. The dose obtained was then reported on an industrial scale. Each
week, an application of the EOLs in the basins and expertises were carried out in order to
analyze the evolution of the phytoplankton and the health of the shrimps. During manufacture,
parameters of pH, nitrate, temperature and presence of lumps on the surface were closely
monitored. We evaluated that the dose with 64% feather meal and 36% meat meal gave the
best performance in terms of nitrate released at the end of manufacture. During the study, we
also realized that the quality of the product becomes better in the hot season compared to the
cold season. The use of this product in shrimp culture does not pose a risk to shrimp health.