APPLICATION OF RADIOACTIVE ISOTOPES IN RESEARCHES OF AGROCHEMISTRY AND SOIL SCIENCE IN HUNGARY
Kinetics of adsorption of phosphorus was studied in a given soil. It was shown by the studies that the adsorption of phosphorus is a very complicated process combining several simuitaneous reactions, involving adsorption, ion exchange and isotope exchange. To separate the individual parts of the process we investigated the charges in the P/sup 32//P/sup 31/ relation during the above mentioned procedures and the changes of pH as well. The investigations were carried out in light diffurent concentration series. The C/sup 14/ labelled organic or inorganic carbon compounds present in the nutrient solution which can be most easily utilized by the plant were also studied. Changes in time of the uptake were recorded, and studies were made to determine the adsorption occurring on the surface of the root. Field experiments were carried out to clear the question of the effect of compounds containing different doses of P/sup 32/ on the dynamics of plant-growth and on the yield of crops. It is to be supposed that the microorganisms of soil support the nutrition of plants by their work furnishing nutritive materials from beyond the atmosphere. Applying the kinetica isotopic method we succeeded in determining that this fact is true and that the bacteria, building a chain of transport, really take part in the nutritive supply of plants. Applying labelled Ca compounds the effects of fertilizers containing Ca on sodic soils were studied. The effects of the fertilizers on soils were also studied. Using phosphorus-82, the behavior of four phosphorus fractions was studied in plants grown on sandy soil during the whole season. The phosphorus content of the nucleic acid was very striking in young tissues, in older tissues it was obserwed to decrease with the proteinphosphorus. In the course of further investigations we studied the incorporation of phosphorus acquired from the nutritive materials into the individual organisms of the plant and in the phosphorus fractions respectively with the help of P/sup 32/. (auth)
- Research Organization:
- Agrochemical Reseach Inst., budapest
- NSA Number:
- NSA-13-006250
- OSTI ID:
- 4288154
- Report Number(s):
- A/CONF.15/P/1713
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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