Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Doctorat → Pays-Bas → 2006 → Effects of soil amendments and drought on zinc husbandry quality on Sahelian sorghum

Wageningen Universiteit (2006)

Effects of soil amendments and drought on zinc husbandry quality on Sahelian sorghum

Traore, K.

Titre : Effects of soil amendments and drought on zinc husbandry quality on Sahelian sorghum

Auteur : Traore, K.

Université de soutenance : Wageningen Universiteit

Grade : PhD thesis 2006

Résumé partiel
In developing countries, short supply of Zinc is limiting both crop yield and human health. Improving Zn bio-availability in staple foods would greatly improve public health. It’s therefore a major challenge to design cereal production techniques resulting in higher Zn mass fractions(MF) in combination with a lower phytic acid (IP-6, the main form of phosphorus accumulation in the grain) MF. In northern Burkina Faso, soil and water conservation (SWC) and soil organic amendments (SOAs) techniquesadopted by farmers haveimproved both water and nutrient availability which consequently increased crop yields.Potentially, this improvement in yield may also improve thebio-availability of Zn from staple foods.This research investigated possible modifications of SOAs as currently practiced by farmers, which increase both the quality and the yield of sorghum in the Sahel. The research generated information on farmers’ perception of the effects of SOAs on grain yield and quality, their knowledge of the relation between sorghum grain quality and health of children and adults. The research provided also information on the quality of SOAs that are being applied ; changes in soil chemical characteristics ; sorghum grain and straw yield ; plant Zn uptake and Zn and IP-6 MFs and the effect of water stress on Zn availability, Zn uptake and Zn and IP6 MFs. These results were used to design a soil amendment combing high crop yield and grain quality Chapter 2 : Sorghum quality, organic matter amendments and health ; farmers’ perception in Burkina Faso, West Africa This paper takes local ecological, cultural and socio-economic aspects into account through a household survey in northern Burkina in 2002. Farmers’ knowledge was compared with available scientific information. The results showed that organic matter production is a function of the number of animals owned and the availability of labour and equipment. Organic resources are allocated to various fields according to soil texture and the crop to be grown. Farmers were unable to link micronutrient deficiency in the soil directly to food quality and human health. However, they indicated some disorders (e.g., fatigue in adults, stunted growth of children, anaemia) which are associated with a low level of micronutrients in the diet. For the design of organic amendments combining improvements in grain yield and food quality in the Sahel, the relation between organic amendment and food quality must be better understood by scientists and explained to farmers.

Mots clés : sorghum / sorghum bicolor / soil amendments / drought / grain / quality / zinc fertilizers / crop husbandry

Présentation et version intégrale

Page publiée le 23 mars 2007, mise à jour le 3 juin 2022