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This article in AJ

  1. Vol. 61 No. 5, p. 674-676
     
    Received: Jan 25, 1969


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doi:10.2134/agronj1969.00021962006100050007x

Zinc Seed Treatment as a Source of Zinc for Beans (Phaseolus vulgaris)1

  1. P. E. Rasmussen and
  2. L. C. Boawn2

Abstract

Abstract

Zinc uptake by bean plants from zinc materials applied to the seed coat was evaluated as a substitute for zinc fertilization and as a means of eliminating the temporary early season zinc deficiency which commonly occurs even after fields have received zinc fertifizafion.

Zinc seed treatment was not an effective substitute for zinc fertilization, since zinc uptake was insufficient to meet plant needs beyond the three-compound-leaf stage of growth even though the amount of zinc applied through seed treatment exceeded total zinc upake requirements for the entire growth cycle.

When used in conjunction with zinc fertilization, zinc seed treatment completely eliminated the temporary scattered zinc deficiency which occurred when beans received only a 11.2 kg Zn/ha soil application. However, no significant yield increase or hastened maturity occurred as a result of elimination of these early season zinc deficiency symptoms. The only apparent benefit of zinc seed treatment in this instance was promotion of more uniform maturity.

The zinc polyflavonoid was superior to ZnSO4 and ZnEDTA compounds when used as the zinc source in seed Ireatment materials.

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