ISHS Acta Horticulturae 145: Symposium on the Use of Fertilizers in Protected Vegetable Production
THE IMPORTANCE OF TRACE-ELEMENTS RESEARCH FOR HUMANITY |
| Author: | I. Pais |
| Abstract:
The importance of the trace-elements for the life all living organisms has been stressed. The list of the trace-elements considered as an assential should be amplified with vanadumi, chromumi, cobalt, nickel, selenium, fluorine. The trace-elements can be compounds of enzymes or they may play promotive role in enzyme activity. Both deficiency and excess of the trace-elements give very serious problems in the human and animal body. The balance of macro-and microelements in the biosphere was deformed by the application of fertilizers, plant-protective compounds. Without taking into account some special districts of the world, the uptakable quantity of the trace-elements in the whole biosphere is generally less than what we need. The continuous control of the element-constitution of the human nutritional basis is necessary with a such sensitive method as the plasma-emission analysis. In all countries it is necessary to build up the organisation for interdysciplinary trace-elements research. It has been known for about 50 years that in the life of all living organisms besides the macro-elements /nitrogen, phosphorus, potassium, calcium, sulphur etc./ trace-elements are also needed in very low concentration, as follows: iron, manganese, zinc, copper, molybdenum, iodine, boron /essential only for the plants/. This list of trace-elements has been amplified in the last two decades with vanadium, chromium, cobalt, nickel, selenium, fluorine /these two last elements are essential only for animals and | |
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