Transformation of Poultry Wastes and Oil Palm Residues into Liquid Fertilizers and its Use in the Fertilization of Oil Palm at the Juvenile Stage

Abstract

The use of organic fertilizers is beneficial and less expensive if applied in adequate doses. This is how the present investigation aims to determine the optimal quantities of vermiwash based on poultry waste and oil palm residues to be applied to oil palms in prenurseries and in nurseries. To do this, different quantities of this locally manufactured vermiwash constituted the treatments applied to the oil palms at the juvenile stage. Growth parameters such as collar diameter, length of longest leaf, number of leaves emitted, and height of seedlings and plants were assessed. At the prenursery stage, the results obtained showed that, whatever the growth parameter, the maximum values were recorded at a dose of 30 ml of vermiwash per seedling. In the nursery, the maximum values were recorded, on the one hand, at the dose of 100 ml in foliar application and, on the other hand, at the dose of 150 ml in application on the substrate. These different doses therefore constitute the optimal doses for the development of the oil palm at the prenursery and nursery stages. Vermiwash from poultry waste and oil palm residues therefore contributes to the development of oil palm at the prenursery and nursery stages and, thus, can be an alternative to chemical fertilization of plants.