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Valorization of shea caterpillar droppings (Cirina butyrospermi Vuillet) in the ecological management of soil fertility in Burkina Faso – IJAAR

Coulibaly K, Gomgnimbou APK, Bacye B, Nacro HB, Sedogo MP

Laboratoire d’étude et de recherche sur la fertilité du sol (LERF), Université Polytechnique de Bobo-Dioulasso (UPB) Bobo-Dioulasso, Burkina Faso

Laboratoire Sol Eau Plante, Institut de l’Environnement et de Recherche Agricole (INERA), Bobo- Dioulasso, Burkina Faso

Laboratoire Sol-Eau-Plante, Institut de l’Environnement et de Recherche Agricole (INERA), Ouagadougou, Burkina Faso

Unité de Recherche en Production Animale (URPAN)/Centre International de Recherche- Développement sur l’Elevage en zone Sub-humide (CIRDES), Bobo-Dioulasso, Burkina Faso

Key words: Caterpillar droppings, Chemical properties, Ecological management, Soil fertility, Burkina Faso.

Abstract

Works on park lands show that shea tree is a widespread species in the fields in Burkina Faso. There are caterpillars which are rich in proteins and throw out important quantity of dejection on the soil surface. The aim of this study was to determine the amount of droppings produced by caterpillars and their chemical quality in Koumbia area. The amount of dejection was determined on small plots and expressed as amount of dry matter (DM). Chemical analyzes have focused on the major elements (C, N, P and K). Our results show an average production of 19.34 kg for an average area of 68.47 m2 under a shea tree. We also observe that the production of caterpillar droppings is a function of the shea trees density and fluctuate between 440 and 3 775 kg ha-1. The data of chemical analyzes show that caterpillar droppings have high content of carbon (477.7 g kg-1) and nitrogen (10.8 g kg-1) and low content of phosphorus (0.3 g kg-1) and potassium (0.9 g kg-1). The amounts of C and N that caterpillar droppings are likely to bring, show that they can cover between 56 and 484 % of annual loss of soil C and fully compensate exports N of major crops (cotton, maize, sorghum) of the study area. The valorization of caterpillar droppings is therefore a way of ecological management of soil fertility of shea parks. However, the C/N (44) of caterpillar droppings suggests further agronomic investigations.

Get the original articles in Source: Archive for | IJAAR |- July, 2016

Journal Name: International Journal of Agronomy and Agricultural Research (IJAAR)

Published By: International Network for Natural Sciences

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