Variability among sorghum genotypes for uptake of elements under acid soil field conditions

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Abstract
The nutritional balance of sorghum [Sorghum bicolor (L.) Moench] plants grown under acid soil stress conditions is one crucial consideration when developing plants which are adapted to these infertile problem soils. Absorption of elements varies with each genotype and ultimately affects plant growth and development. This study compared seventeen different sorghum grain genotypes for their individual patterns of leaf nutrient accumulation when grown under acid soil field conditions (pH ≤ A.8) over a three‐year period. Significant differences among years for leaf concentrations of Ca, Mg, K, Mn, P, Fe, Al, and Zn were detected. Year x genotype interactions occurred for Ca, Mg, and Mn leaf concentrations. All genotypes in this study differed in their ability to absorb elements, but some general patterns of nutrient accumulation were noted. Comparison of SCO283, an acid soil tolerant genotype, and BSD106, a susceptible genotype, revealed differences in mean concentrations of Al, Fe, Mn, and Cu. For breeding purposes, these four elements would definitely need to be monitored when determining the nutritional profile of various genotypes which are grown under acid soil stress conditions.