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Relation Between Phosphorus and Micronutrients in Plants
Author(s) -
Bingham Frank T.
Publication year - 1963
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1963.03615995002700040012x
Subject(s) - micronutrient , phosphorus , chemistry , orange (colour) , nutrient , substrate (aquarium) , zinc , boron , bioinorganic chemistry , magnetite , horticulture , environmental chemistry , botany , food science , biology , biochemistry , ecology , organic chemistry , paleontology
Sand culture experiments were conducted to evaluate the role of the plant and phosphorus substrate concentration in the possible phosphorus‐induced changes in micronutrient availabilities. Beans, corn, tomatoes, and sour orange seedlings were grown 6 weeks or more under controlled sand culture conditions with P concentrations being maintained at 1 ppm. P, 10 ppm. P, and 100 ppm. P. The micronutrients were uniformly added to all P solutions in amounts calculated to produce concentrations of 0.25 ppm. of B and Mn, and 0.05 ppm. of Cu, Mo, and Zn. Iron, as magnetite, was incorporated with the sand. No P‐induced Zn or Cu deficiency occurred in any of the plants tested. In case of citrus, the levels of Zn within the plant actually increased with increasing substrate P. Of all plants tested for possible P‐Cu antagonisms, only citrus exhibited a reduction in Cu uptake. Boron, Fe, Mn, and Mo were similarly studied. High P substrate concentrations may restrict the movement of Mo and Fe in some plants. Variable results were noted for B and Mn. Regarding mechanisms of P‐induced Zn or Cu deficiency, the experiments suggest that the plant is not exclusively involved; reactions occurring outside of the physiologically active root contribute to the induced deficiency.