Comparative effects of Minjingu phosphate rock and triple super phosphate on residual P in an Ultisol

A glasshouse experiment was conducted at Sokoine University of Agriculture to compare the effects of Minjingu Phosphate Rock (MPR) and Triple Super Phosphate (TSP) on Residual Phosphorus in an Ultisol. The soil was collected after seven years since 480 kg/ha fertilizer application was stopped. MPR and TSP fresh application increased significantly (P= 0.05) the soil phosphorus, maize dry matter yield (DMY), P concentration and uptake. Both residual P from MPR and TSP treated soil were comparable in Bray I, maize DMY, and P uptake although the values were lower than for fresh application. The values were above the suggested critical concentration.
Une expérience de serre a été entreprise au sein de la faculté d’agronomie de l’université Sokoine pour comparer les effets du Phosphate Naturel de Minjingu (MPR) et du Phosphate Super Triple (TSP) sur le phosphore résiduel dans un Ultisol. Le sol a été rassemblé après sept ans puisque l’application d’engrais de 480 kg/ha a été arrêtée. L’application fraîche de MPR et de TSP a augmenté de manière significative (P= 0.05) le phosphore du sol, le rendement en matière sèche de maïs (DMY), la concentration en P et son absorption. Les phosphores résiduels du sol traité avec MPR et TSP étaient comparables dans le Bray I, le rendement DMY du mais et l’absorption du phosphore P bien que les valeurs aient été plus inférieures que pour l’application fraîche. Les valeurs étaient au-dessus de la concentration critique suggérée.
Date of publication: 
Region Focus: 
East Africa
RUFORUM Conferences and Workshops
Licence conditions: 
Open Access
Access restriction: 
Printed resource

About the RUFORUM 2010 Biennal Conference
"The 2010 RUFORUM Biennial Conference was the second in the series. The main objective of the Biennial conferences is to provide a platform for agricultural research for development stakeholders in Africa and beyond to actively exchange findings and experiences, while at the same time learning lessons towards improving performance of the agricultural sector and ultimately people’s livelihoods. The biennial conference is RUFORUM’s most comprehensive meeting for the diversity of stakeholders in agriculture. It is especially dedicated to graduate students and their supervisors, grantees in RUFORUM member universities and alumni. It is a platform for peer review, quality control, mentorship, networking and shared learning. This record contains an extended abstract accepted under the theme of Natural Resource Management"