Proximate composition and mineral content in different, types of traditional TOGWA used in Tanzania as a weaning food

Tanzania Journal of Agricultural Sciences 2001, Vol. 4(2) :65-74Six types of traditional togwa (a traditional fermented gruel prepared from a mixture of malted and unmalted cereal grains), six simulated togwa and their ingredients were analysed for proximate composition, energy and mineral contents. The cereals used were maize (Zea mays), finger millet (Eleusine coracana) and sorghum (Sorghum bicolor). Malt was prepared from sorghum and finger millet. The: concentration of protein in traditional and simulated togwa was higher compared to their main ingredients. The ranges were 9.1-12.5, 9.9-12.9 and 8.7-12.0% respectively. Crude fibre was also higher in traditional and simulated togwa than in the main ingredients, while carbohydrate percent of DM and energy contents were lower than in the ingredients. Ash contents in traditional togwa was 1.44-2.21% and for simulated togwa 1.32-2.2%. Results for mineral contents indicated that phosphorus; magnesium and potassium were the major mineral constituents in both the traditional togwa and laboratory simulated samples. In the traditional and simulated togwa samples, phosphorus content ranged, respectively befween 196-334 and 191-332 (mg/100g), magnesium between 59.5-123.7 and 59.4-123 (mg/100g) and potassium between 167-315 and 167-313 (mg/100g). Calcium range was 3.95-12.32 (mg/100g) in traditional togwa and 3.40-11.92 (mg/100g) in simulated togwa compared to 5.57-14.59 (mg/100g) in the main ingredients. Iron, zinc and copper contents were slightly higher in traditional and in simulated togwa compared to their levels in the main ingredients. Iron ranged between 18.5-23.8 and 18.5-24.8 (mg/100g) in traditional and simulated samples respectively, and zinc ranged between 1.39- 1. 82 (mg/100g) in traditional togwa and 1.41-1.81 (mg/100g) in simulated samples. The contant of coppel in traditional and simulated togwa were 0. 33 - 0.69 and 0.32-0.70 (mg/100g), respectively. Apparently, the choice of cereal and malt and the processes of germination and fermentation for togwa production affects the proportions of nutrients found in the product. This results in different types of togwa with variation in proximate composition, energy density and mineral content

Proximate composition and mineral content in different, types of traditional TOGWA used in Tanzania as a weaning food

Tanzania Journal of Agricultural Sciences 2001, Vol. 4(2) :65-74Six types of traditional togwa (a traditional fermented gruel prepared from a mixture of malted and unmalted cereal grains), six simulated togwa and their ingredients were analysed for proximate composition, energy and mineral contents. The cereals used were maize (Zea mays), finger millet (Eleusine coracana) and sorghum (Sorghum bicolor). Malt was prepared from sorghum and finger millet. The: concentration of protein in traditional and simulated togwa was higher compared to their main ingredients. The ranges were 9.1-12.5, 9.9-12.9 and 8.7-12.0% respectively. Crude fibre was also higher in traditional and simulated togwa than in the main ingredients, while carbohydrate percent of DM and energy contents were lower than in the ingredients. Ash contents in traditional togwa was 1.44-2.21% and for simulated togwa 1.32-2.2%. Results for mineral contents indicated that phosphorus; magnesium and potassium were the major mineral constituents in both the traditional togwa and laboratory simulated samples. In the traditional and simulated togwa samples, phosphorus content ranged, respectively befween 196-334 and 191-332 (mg/100g), magnesium between 59.5-123.7 and 59.4-123 (mg/100g) and potassium between 167-315 and 167-313 (mg/100g). Calcium range was 3.95-12.32 (mg/100g) in traditional togwa and 3.40-11.92 (mg/100g) in simulated togwa compared to 5.57-14.59 (mg/100g) in the main ingredients. Iron, zinc and copper contents were slightly higher in traditional and in simulated togwa compared to their levels in the main ingredients. Iron ranged between 18.5-23.8 and 18.5-24.8 (mg/100g) in traditional and simulated samples respectively, and zinc ranged between 1.39- 1. 82 (mg/100g) in traditional togwa and 1.41-1.81 (mg/100g) in simulated samples. The contant of coppel in traditional and simulated togwa were 0. 33 - 0.69 and 0.32-0.70 (mg/100g), respectively. Apparently, the choice of cereal and malt and the processes of germination and fermentation for togwa production affects the proportions of nutrients found in the product. This results in different types of togwa with variation in proximate composition, energy density and mineral content

Growth and development of wetland-grown taro under different plant populations and seedbed types in Uganda

Taro [ Colocasia esculenta (L.) Schott] is a member of the Araceace family that is a staple food for many people in developing countries in Africa, Asia and the Pacific Islands. It is widely grown in Uganda but the extent of its production and consumption is not known, partly because it has been ignored as legitimate crop for research and development (R&D), and it is managed outside the conventional agricultural production, marketing and economic channels. Therefore, there is limited information on many aspects of taro, including agronomic practices. In order obtain data that can support improved and sustainable taro production, a field trial was conducted over two cropping seasons at Kabanyolo in central Uganda, to determine the effect of three taro plant populations (10,000, 17,760 and 40,000 pph) and two seedbed types (flat and ridged seedbed) on growth and yield of taro. The treatments were arranged in a split - split - plots design, with three replications. Seedbed type was in the main plot and plant populations in the sub-plots. These were further split to accommodate five sampling dates for plant growth. Each experimental subplot measured 6 m x 6 m and contained 36, 64 and 144 experimental plants, respectively. During a 5-month growth period, leaf area index (LAI) and corm yield were significantly (P < 0.05) higher in closely spaced plants (high plant population). Seedbed type had no (P>0.05) effect on taro growth and yield. However, using high plant population may not be recommended because of the enormous amount of planting material that would be needed. From this study, a moderately wide spacing of 0.75 m x 0.75 m which produced an acceptable yield of 5.5 - 6.8 t ha-1 would be recommended.Le Taro [ Colocasia esculenta (L.) Schott] est membre de la famille Araceace qui est un aliment de base pour un grand nombre de personnes dans les pays en développement en Afrique, Asie et Pacifique. Le Taro est largement cultivé dans bon nombre de zones humides en Ouganda, mais comme une activité de production informel gérée sans appui de la recherche et la vulgarisation agricole. Par conséquent, il y a peu de renseignements sur de nombreux aspects de Taro, y compris les pratiques agronomiques. Afin d’obtenir des données qui peuvent soutenir une production durable et améliorée de Taro, un essai au champ avait été établi au centre de l’Ouganda en deux saisons culturales afin de déterminer l’effet des trois populations de plantes de Taro (10.000 ; 17.760 et 40.000 plants par hectare (pph) et deux types de bandes de plantation (plate et rugueuse) sur la croissance et le rendement de Taro. Les traitements avaient été organisées en split - split - plot dans un modèle en blocs completement randomisés avec trois réplications. La bande de sémis type était dans la parcelle principale qui avait été divisée pour recevoir trois populations végétales et celles-ci étaient en plus divisées pour recevoir cinq dates de plantation échantillonnées pour la croissance des plantes. Pendant une période de croissance de 5 mois, l’index de surface de feuilles (LAI) et le rendement en bulbe étaient significativement plus élevés (P < 0,05) dans les plantes étroitement espacées (plante à population dense), tandis que le type de bande de plantation n’avait pas affecté la croissance et rendement de Taro. Toutefois, une densité de plantation élevée pourrait ne pas être recommandée en raison de la quantité énorme de materiel de plantation qui serait nécessaire en plus de rendement net réduite par unité de matériel de plantation. De cette étude, un espacement modérément large de 0,75 m x 0,75 m qui avait produit un rendement acceptable de 5,5 - 6,8 tonnes par hectare pourrait être recommandé. Le choix du type de bande de plantation à être utilisée pour la production de Taro doit dépendre de la topographie et du degré de l’humidité de la zone de production