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Abstract
A pot experiment was conducted to study the interaction between elemental Sulfur (S0) and zinc (Zn), the effect on solubility of soil Zn and soil-available Sulfur (S), and their uptake by spring wheat (Triticum aestivumL.). Elemental Sulfur was added at three rates (0, 50, and 100 mmol kg− 1 soil) and Zn was added in solution at four rates (0, 50, 100, 200 mg/kg soil) before planting. The plants were harvested after 40 days of growth. The result showed that soil pH decreased significantly with the S0 supply at each rate of Zn. However, Zn supply did not induce the soil pH change at each rate of S0. Concentration of soil-available S was significantly increased with an increase in S0 supply at each rate of Zn, whereas it did not vary with an increase in Zn supply at each rate of S0. Concentration of soil CaCl2-extractable Zn was significantly increased with an increase in Zn supply at each rate of S0, but a significant increase with S0 supply occurred only at the rate of 200 mg · kg− 1 Zn. The shoot and root yields of spring wheat did not differ significantly at each rate of S0 and Zn. The concentration of Zn in plant tissues and total Zn uptake by spring wheat were increased significantly with increasing Zn supply, and the concentration of Zn and total Zn in roots were both higher than that in shoots, except the total Zn uptake at the rate of 100 mg kg− 1 Zn without S0 supply. Concentration and uptake of Zn in spring wheat increased with an increase in S0 supply in each rate of Zn, except Zn uptake at the rate of 50 mg kg − 1 Zn. Concentrations of S in shoot and root of spring wheat increased significantly with an increase in S0 supply, and at the rates of 0 and 50 mmol · kg− 1 S0, the concentration of S in shoots was higher than that in roots. Conversely, at the rate of 100 mmol · kg− 1 S0, the concentration of S in roots was higher than that in shoots. Total S uptake increased significantly with an increase in S0 supply, and total S uptake in shoots was higher than that in roots, except rates, of 0 and 50 mg kg− 1 Zn without 100 mmol S0 supply. In addition, the distribution rate of total S (in shoot/root) decreased with an increase in S0 supply. In conclusion, S0 enhances the solubility of Zn and its uptake by spring wheat. The concentration of available S in soil and concentration of S in spring wheat increased with the increase of elemental Sulfur. Zn addition also influenced the concentration of S in spring wheat.
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