Effets des amendements locaux sur les rendements, les indices de nutrition et les bilans culturaux dans un système de rotation coton-maïs dans l'ouest du Burkina Faso

• Main Authors: Koulibaly B., Traoré O., Dakuo D., Zombré PN.
• Format: Article
• Language: English
• Published: Presses Agronomiques de Gembloux 2009-01-01
• Series: Biotechnologie, Agronomie, Société et Environnement
• Subjects: amendment; Burkina Faso; cotton-maize rotation; mineral balance; mineral nutrition; yield
• Online Access: http://www.pressesagro.be/base/text/v13n1/103.pdf
• ISSN: 1370-6233; 1780-4507

ffects of local amendments on yields, nutrition indexes and mineral balances in a cotton-maize rotation system in the west of Burkina Faso. After 20 years of continuous cropping system on a tropical ferruginous soil, the effects of three amendments on crop yield and nutrients uptake were studied for two years in this system. Compost, phosphate rock and dolomite amendments at respectively the rate of 6, 0.3 and 1.5 t.ha-1 were compared to the control soil not amended. The experimental design was a block Fisher with three amendments and four replications. Cotton (Gossypium hirsutum L.) and maize (Zea mays L.) mineral nutrition were determined as well as their yields. These plants dry matter productions were measured after harvesting. Results showed that compost, phosphate rock and dolomite application to soil improved the dry matter production of cotton and maize plants. Soil amendment with 6 t.ha-1 of compost significantly improved cotton seed and maize production. In the same time, the application of 1.5 t.ha-1 of dolomite limestone significantly increased maize yield. The application of phosphate rock (0.3 t.ha-1) had no effect on cotton or maize yields as well as their dry matter production. Compost, phosphate rock and dolomite application to soil had no influence on cotton and maize plants contents in N, P and K. Seventy days after sowing, the amendments did not improve cotton nutrition indexes which revealed a good nutrition for P, K and S. Nutrition indexes indicated that N deficiencies in cotton plants with amended soils (IN < 80) were more important than those observed with cotton plants grown on control soil (IN = 84). The application of mineral fertilizer to the control soil or to amended soils gave positive balances for nutrients like P (45 to 100 kg.ha-1) and S (5 to 24 kg.ha-1), while soils amended with phosphate rock and dolomite showed a high deficit for N and K, compared to the control soil. The study showed that compost combined to mineral manures could improve soil fertility due to the nutrients excess balances in N, P and S.