Journal of Plant Nutrition, cilt.23, sa.4, ss.541-550, 2000 (SCI-Expanded)
The effect of increasing levels of applied phosphorus (P) and boron (B) on the growth and the concentration and uptake of P and B were examined in eight maize genotypes (Furio, Riogrande, Sele, DK 743, Helix, Missouri, Betor, and Poker) with two individual greenhouse experiments. Phosphorus was applied at 0, 50, and 100 mg kg-1 in Experiment I and B at 0, 10, and 30 mg kg-1 levels in Experiment II. Application of B resulted in increased concentration and uptake of B and a decreased P concentration and uptake in all genotypes. The dry weight of all genotypes was decreased by application of B. However, applied P decreased B concentration and uptake and increased P concentration and uptake of the genotypes. The dry weight of all genotypes was increased by application of P. These experiments show that B is more toxic in the absence of rather than the presence of P, and that this toxicity could be alleviated with applications of P in the calcareous soils of semiarid areas.