Effect of Phosphorus Carriers and Zine Sources on Phosphorus-Zine Interaction in Corn
1969
Ganiron, R. B. | Adriano, D. C. | Paulsen, G. M. | Murphy, L. S.
Growth of corn (Zea mays L.) seedlings in solution cultures responded to temperature > Zn rate > P carrier > Zn source. Phosphorus accumulated in roots and shoots of Zn-deficient seedlings at the higher temperature, but was depleted from roots when seedlings were supplied with Zn. Nearly similar Zn concentrations were usually present in roots and shoots of seedlings grown at the lower temperature, suggesting that temperature affected soil Zn availability more than uptake or translocation. Monoammonium phosphate (MAP) was slightly more favorable for growth than ammonium polyphosphate (APP), but APP increased P uptake more than MAP. Chelated Zn was a slightly more efficient source than Zn sulfate. Phosphorus depressed corn grain yields when soil Zn levels were low. Applying Zn increased grain yields only to levels produced without P fertilization. Concentrations of P in the leaves varied inversely with the rate of Zn fertilization, but concentrations of Zn were not affected markedly by the treatments. APP and chelated Zn were only slightly better sources than MAP and Zn sulfate, respectively.
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