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SM-CRSP IFS IER Development of a Potassium (K) module to be incorporated into Nutrient Management Support System for major West African soils Adama BAGAYOKO.

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Presentation on theme: "SM-CRSP IFS IER Development of a Potassium (K) module to be incorporated into Nutrient Management Support System for major West African soils Adama BAGAYOKO."— Presentation transcript:

1 SM-CRSP IFS IER Development of a Potassium (K) module to be incorporated into Nutrient Management Support System for major West African soils Adama BAGAYOKO

2 WEST AFRICAN SOILS CONSTRAINTS
P and N deficiencies

3 POTASSIUM (K) DEFICIENCY
SM-CRSP Source ADSC UH POTASSIUM (K) DEFICIENCY Preliminary results of Nioro-Senegal Number of sample farmers Means exchangeable K mg/kg 52 A.N’diaye 10.6 48 T. Sene 7.0 50 O. kane 2.6 60 C .Wilane 0.1 56 A. Toure 7.5 46 M. Diabo 8.8 C. Ba 3.7

4 POTASSIUM (K) DEFICIENCY
Source LaboSEP IER POTASSIUM (K) DEFICIENCY Preliminary results cotton zone in Mali Figure1. Spatial distribution of exchangeable K in cotton zones in Mali Figure 2. Name of site cotton zones in Mali

5 HYPOTHESIS The continuous cropping systems, without K fertilization deplete the K reserve of most West African soils. Therefore, K applications on these soils become necessary to increase soil nutrient status and sustain or increase crop yields. SM-CRSP IFS IER

6 OBJECTIVES The overall objective is to develop K specific recommendations for key stable food crops in West Africa Specifics objectives: To develop and compare a K module to accurately predict K fertilizer requirements, 2. To determine economic benefit. SM-CRSP IFS IER

7 METHODOLOGY Soil analysis Incubation
Soil collection : Cinzana Landform (Toposequence) SM-CRSP IFS IER Soil label CZ1 CZ2 CZ3 CZ4 Soil analysis Incubation CZ5

8 RESULTS AND DISCUSSION
SM-CRSP IFS IER RESULTS AND DISCUSSION

9 Malian soils results Soil Name Mineralozy Texture (%) Clay sand Loam
Cinzana 1 Quartz, kaolinite 4 92 Cinzana 2 3 93 Cinzana 3 5 88 7 Cinzana 4 14 81 Cinzana 5 36 54 10 SM-CRSP IFS IER

10 Soil pH Cinzana Topsoil
SM-CRSP IFS IER

11 Extractable and Exchangeable K (mg/kg) Cinzana Topsoil
SM-CRSP IFS IER

12 Total and Extractable K (mg/kg) Cinzana Topsoil, Mali
SM-CRSP IFS IER

13 INCUBATION RESULTS SM-CRSP IFS IER

14 CONCLUSION Future research K Buffer coefficient
SM-CRSP IFS IER CONCLUSION Potassium levels are low Future research K Buffer coefficient Development of a potassium (K) module

15 THANKS SM-CRSP Soil Management Collaborative Research Support Program
Sponsors THANKS SM-CRSP Soil Management Collaborative Research Support Program TPSS Department of Tropical Plant and Soil Science University Hawaii at Manoa IFS International Foundation for Science, Sweden

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