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ABSTRACT
Phosphorus-Zn interactions in fiber flax, Linum usitatissimum L., were studied in growth chambers by means of a two-zone root technique and nutrient solutions. Zinc and P were added separately from each other and the other essential elements; therefore, any interactions that occurred between them or with other elements had to take place at root surfaces or within the plant.
Increasing either Zn or P in the substrate increased the concentration and total uptake of the respective element in the roots and tops of the flax plants.
When P was added first, Zn increased total P in the lower and upper roots and decreased total P in the tops. When Zn was added first, P increased total Zn in the lower roots and decreased total Zn in the tops.
The results indicate that P and Zn react together within the roots in a manner that reduces either their mobility or solubility.
Key Words: root techniques two-zone
2 Associate Professor, Agronomy and Soils Department, and Head, Agricultural Chemical Services Department, Clemson Univ. Clemson, S.C.
Received for publication May 21, 1966. Accepted for publication April 3, 1967.
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