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Improved cereal production via N and P efficient legume genotypes in the Gilgel-Gibe catchment, Ethiopia Amsalu Nebiyu*, Pascal Boeckx** and Jan Diels***

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Presentation on theme: "Improved cereal production via N and P efficient legume genotypes in the Gilgel-Gibe catchment, Ethiopia Amsalu Nebiyu*, Pascal Boeckx** and Jan Diels***"— Presentation transcript:

1 Improved cereal production via N and P efficient legume genotypes in the Gilgel-Gibe catchment, Ethiopia Amsalu Nebiyu*, Pascal Boeckx** and Jan Diels*** *Jimma University, Ethiopia,**Laboratory of Applied Physical Chemistry (ISOFYS), Faculty of Bioscience Engineering, UGhent, Belgium, * * *Department of Soil and Water Management, KULeuven, Belgium Problem Low productivity due to N and P deficiency, P fixing acid soils High nutrient depletions High cost of fertilizers General objective Develop integrated nutrient management practices to increase productivity through promoting legume crop genotypes with enhanced BNF, P use efficiency and greater productivity Study area Materials and Methods Specific objectives Determine nutrient depletion Quantify BNF for faba bean Identify genotypes for positive soil N balance, P use efficiency and grain yield potential Assess extent of root colonization by mycorrhiza Investigate mechanisms of enhanced P use efficiency Evaluate rotational effects Specific objectives Determine nutrient depletion Quantify BNF for faba bean Identify genotypes for positive soil N balance, P use efficiency and grain yield potential Assess extent of root colonization by mycorrhiza Investigate mechanisms of enhanced P use efficiency Evaluate rotational effects Activity 1 (2008/09) Screening of faba bean (Vicia faba) 16 genotypes screened for Adaptability, Nodulation, Yield and agronomic performance RCBD, 3 reps used, ANOVA & LSD 0.05, for mean comparison Activity 2 (2009/10) BNF and P uptake studies Farmer’s field trial at Dedo, RCBD, 3 reps 2 factors: fertilizer (0, 30 kg -1 as TSP) and genotype ( six faba ) BNF, 15 N natural abundance, wheat as reference P Uptake and use efficiency Results Table1. Grain yield and yield components of 16 faba bean varieties evaluated at Jimma and Dedo, 2008/2009 Fig 1. Interaction Plot (fitted means) for Total P uptake (kg/ha) of six faba bean varieties Fig 2. Interaction Plot (fitted means) for P-use efficiency (g shoot mg P -1 ) Conclusions Evaluate rotational effects of superior fafa bean varieties like Moti, Obse, and Degaga for the subsequent cereal crop (Activity 3) Table 2. Effect of variety and P application on Grain yield and Nitrogen fixation of faba bean at Dedo Varieties PPP * 1000SW (g)GY (t ha -1 ) JimmaDedomeanJimmaDedomeanJimmaDedomean Holeta-211.1abc13.5 12.3 476.2de528.2bc 502.2cd 1.3bcd 2.8ab2.1ab Obse5.1g8.3 6.7 620.4b565.1b 592.7b 0.6g 1.9cdef1.3cd NC-5810.3bcd13.9 12.1 389.9hi423.3cd 406.6g 1.1bcdef 2.6abc1.8ab Bulga-708.9bcdef14.9 11.9 447.0ef424.3cd 435.7efg 1.3bc 2.7abc2.0ab Salale10.1bcde17.3 13.7 351.7i304.5de 328.1h 0.8efg 1.4def1.1d Moti8.5cdef25.6 17.1 698.1a469.6bc 583.8b 1.4bc 2.3abcd1.8ab Tesfa10.2bcd18.5 14.4 418.5fgh476.9bc 447.7defg 1.3bcde 2.8ab2.0ab Mesay12.3ab19.7 16.0 439.9efg504.8bc 472.3def 1.4b 2.9ab2.2a Degaga10.1bcde15.3 12.7 490.0d484.2bc 487.1de 1.4b 2.9ab2.2a Gebelcho7.2efg13.1 10.2 665.6a757.5a 711.6a 1.1bcdef 2.3bcd1.7bc Kuse9.6bcde15.9 12.8 422.3fgh442.8c 432.5efg 1.0bcdefg 2.2bcde1.6bc Wayu10.0bcde16.5 13.3 309.0j280.4e 294.7h 0.8defg 1.2ef1.0d Walki13.7a14.6 14.2 534.2c574.9b 554.6bc 1.9a 2.5abc2.2a CS20DK6.5fg13.0 9.8 429.6fgh507.8bc 468.7def 0.9cdefg 1.7def1.3cd Kasa10.5bcd14.0 12.3 403.3gh444.9bc 424.1fg 1.1bcdefg 2.2bcd1.7bc Local7.9defg15.5 11.7 480.7fgh458.8bc 433.8efg 0.7fg 3.1a1.9ab Mean9.6b15.6a 12.6 469b478a 473.5 1.1b 2.4a1.6 CV (%)18.943.139.25.215.111.320.622.624.2 LSD 0.05 3.0ns 40.6120.062.00.470.810.46 Varieties (V) Grain yieldTotal N-yieldTotal N-fixedNdfaN-balance (kg ha -1 ) (%)(kg ha -1 ) CS-20DK3737.5bc332.6bc231.769.963.3 Degaga4840.0ab405.9a290.274.188.9 Gebelcho3237.1c308.3c225.276.078.4 Moti5500.0a426.9a293.469.577.3 Obse4703.8ab406.7a268.365.768.9 Walki4534.6ab381.3ab268.371.379.3 Mean 4425.5376.9262.871.176.0 LSD 0.05 116862.8ns P (kg ha -1 ) 03748.8b328.8b238.5b73.472.6 305102.2a425.1a287.2a68.779.4 Mean4425.5377.0262.971.176.0 LSD 0.05 674.2536.30639.582 ns CV%22.013.921.810.637.6 * PPP= Pods per Plant; 1000SW= one thousand seeds weight; GY= Grain yield, Ndfa= Nitrogen derived from the atmosphere *Means followed by the same letter within a column are not statistically significant to each other, ** Nitrogen derived from the atmosphere, ns= not significant This is PhD work done in the context of the IUC-JU project Contacts: PhD: amsalu.nebiyu@ju.edu.et; supervisors: pascal.boeckx@ugent.be, jan.diels@ees.kuleuven.bepascal.boeckx@ugent.bejan.diels@ees.kuleuven.be

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