Summary
The response of barley to phosphate application and the effect of applied phosphorus on the uptake of soil zinc by the crop were tested in pot, Neubauer and incubaticn experiments on four soils differing in native phosphate status.
There was a response of the yield to phosphorus application in alluvial soils from Clementina (Ecuador) and Bangla Desh. Barley grown on red soil from Bangla Desh and glacial clay from Uppsala did not show any response to P application.
Applied P32 was fixed to a great extent in all the soils studied. But in phosphate-deficient soils, a much higher degree of sorption of P32 was recorded than in phosphate-rich soils. Compared to phosphate-rich soils, the utilization of fertilizer phosphorus is higher than of native soil P in the case of phosphate-deficient soils. It was observed that uptake of Zn65 by the crop is counteracted by phosphorus application at the three stages of crop growth studied.
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This work was financially supported by the International Atomic Energy Agency, Vienna, Austria, and by the National Council for Forestry and Agricultural Research, Sweden.
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Motsara, M.R. On the effects of phosphorus on zinc uptake by barley. Plant Soil 38, 381–392 (1973). https://doi.org/10.1007/BF00779020
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DOI: https://doi.org/10.1007/BF00779020