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- W2055029428 abstract "Abstract Low concentrations of Mg and Ca in cool‐season grasses in late fall and early spring are a primary cause of grass tetany and wheat pasture poisoning in grazing cattle. Our objective was to investigate phosphate interaction with the uptake and leaf concentration of Mg, Ca, and K in winter wheat ( Triticum aestivum L., cv. Larned) seedlings. Seedlings were grown hydroponically or in pots containing perlite with a solution containing nutrient element concentrations that mimicked the soil solution of a typical midwestern alfisol. Phosphate concentration of this solution was low so that wheat seedlings depleted solution P within a few hours. At low solution P concentrations, Mg and Ca were effluxed from roots. As solution P was increased from 25 to over 100 μ M , net uptake of both Mg and Ca was observed over a 48 h period. In 41‐d greenhouse experiments, Mg and Ca concentrations increased and K concentration decreased in the leaf as P treatments were increased. Tetany is likely to occur in ruminants consuming grass with equivalent ratios of K/(Ca + Mg) > 2.2. Increasing P from 50 to 400 μ M lowered this ratio from 1.8 to 1.0 and from 1.7 to 1.2 in separate greenhouse experiments. Concentrations of P above 100 μ M stimulated net uptake, increased leaf Mg and Ca concentration, and produced leaf tissues with a very low K/(Ca + Mg) ratio." @default.
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- W2055029428 date "1991-11-01" @default.
- W2055029428 modified "2023-09-27" @default.
- W2055029428 title "Phosphate Interaction with Uptake and Leaf Concentration of Magnesium, Calcium, and Potassium in Winter Wheat Seedlings" @default.
- W2055029428 doi "https://doi.org/10.2134/agronj1991.00021962008300060021x" @default.
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