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Oat and Rye Root Decomposition Effects on Nitrogen Mineralization

R.N. Malpassia, T.C. Kasparb, T.B. Parkinb, C.A. Cambardellab and N.A. Nubelb

a Plant Morphology, Universidad Nacional de Rio Cuarto, 5800 Rio Cuarto, Cordoba, Argentina
b USDA-ARS, National Soil Tilth Lab., 2150 Pammel Dr., Ames, IA 50011 USA



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  		Fig. 1 Net N mineralized (includes soil NO-3 + soil NH+4 + N lost through denitrification) during Exp. 1 (roots mixed with soil) plus initial soil N content. Bars represent LSD(0.05)

 


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  		Fig. 2 Nitrogen contained in roots and coarse organic matter during Exp. 1 (roots mixed with soil). Bars represent LSD(0.05)

 


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  		Fig. 3 Net N mineralized (includes soil NO-3 + soil NH+4 + N lost through denitrification) during Exp. 2 (roots in situ) plus initial soil N content. Bars represent LSD(0.05)

 


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  		Fig. 4 Nitrogen contained in roots and coarse organic matter during Exp. 2 (roots in situ). Bars represent LSD(0.05)

 


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  		Fig. 5 Carbon contained in roots and coarse organic matter during Exp. 1 (roots mixed with soil). Bars represent LSD(0.05)

 


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  		Fig. 6 Carbon contained in roots and coarse organic matter during Exp. 2 (roots in situ). Bars represent LSD(0.05)

 


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  		Fig. 7 Soil respiration rate during Exp. 1 (roots mixed with soil). Bars represent LSD(0.05)

 


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  		Fig. 8 Soil respiration rate during Exp. 2 (roots in situ). Bars represent LSD(0.05)

 




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