SVIBOR - Project code: 4-01-082

MINISTRY OF SCIENCE AND TECHNOLOGY

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Project code: 4-01-082


Genotypic and ecologic basis of corn mineral nutrition


Main researcher: KOVAČEVIĆ, VLADO (22820)



Assistants
Type of research: basic
Duration from: 01/01/91. to 12/15/95.

Papers on project (total): 25
Institution name: Poljoprivredni fakultet, Osijek (79)
Department/Institute: Department of Agricultural Chemistry
Address: Trg svetog TRojstva 3
City: 31000 - Osijek, Croatia
Communication
Phone: 385 (0)31 128 017
Phone: 385 (0)31 128 017

Summary: The investigations in the period from 1991 to 1995 are part of more than 20 year long continued work of this project. In the last five/year period, they were conducted in total 15 field experiments with fertilization of seed-corn. In the seven trials corn responded to presowing zinc application, while in four trials it was found response to phosphorus and potassium fertilization. Corn did not responded on foliar application of zinc. Also, in the second group of trials, they were tested corn inbred lines under normal soil conditions and under soil stress conditions-low level either phosphorus or potassium. Five corn inbred lines and their 20 hybrids were grown on acid soil which contains high level of plant available aluminium. They were found inbred lines and hybrids which are something more tolerant to this soil stress. Twelwe corn inbred lines and 14 hybrids were grown on gleysol (low K supply) on different levels of potassium fertilization. In the above mentioned experiments they were determined grain yields, while in some cases they were taken leaf samples for chemical analysis. As our building including cabinets and laboratories, are destoyed by war attacs, some chemical analysis were made abroad. The results of these investigations were either published or in preparing stage for publication in collaboration with foreign institutes.

Keywords: seed-corn, corn inbred lines, plant mineral nutrition, zinc,phosphorus, potassium, field trials, soil types.

Research goals: Croatia produces important amounts of corn seeds for its and foreign market. Diversity of soil types and their chemical properties (for example pH value, ion composition, plant available nutrient contents etc) are reasons that some parcels are les favourable for this assigment. The disorders of corn growth and development with the appearance the symptoms of eiher phosphorus, potassium or zastern inc deficiency, as well as toxicity of aluminum, appeared under Eastern Croatian environmental conditions. Coldly and moistly spring is promoting factor of appearance of these disorders, while under normal and dry conditions they are either les expressed or secretly, but the grain yields are relativelly lower. In general, it is the fact that the parents of corn hybrids (these are usually inbred lines) are more susceptible to environmental stress conditions compared to their progeny (hibrid corn). For this reason, testing of tolerance degree of commercial and experimental inbred lines with regard of different soil stress types has both a practical and theoretical importance.


COOPERATION - INSTITUTIONS


  1. Name of institution: Poljoprivredni institut, Odjel za oplemenjivanje i genetiku kukuruza
    Type of institution: State institute
    Type of cooperation: Joint publishing of scientific papers
    City: 31000 - Osijek, Croatia

  2. Name of institution: Podravsko gospodarstvo, IstraĐivanja i razvoj
    Type of institution: Economical/Production
    Type of cooperation: Other
    City: 48300 - Koprivnica, Croatia

  3. Name of institution: Poljoprivredno industrijski kombinat ŽćakovoŽ d.d.
    Type of institution: Economical/Production
    Type of cooperation: Systematic exchange of information
    City: ćakovo, Hrvatska

  4. Name of institution: Poljoprivredno industrijski kombinat ŽKutjevoŽ d.d.
    Type of institution: Economical/Production
    Type of cooperation: Systematic exchange of information
    City: Kutjevo, Hrvatska

  5. Name of institution: Magyar Tudomanyos Akademia Talajtani es Agrokemiai Kutato Intezete
    Type of institution: State institute
    Type of cooperation: Joint publishing of scientific papers
    City: H-1022 - Budapest, MaĆarska

  6. Name of institution: Institut fur Pflanzenernahrung, Universitat Hohenheim
    Type of institution: University/Faculty
    Type of cooperation: Joint publishing of scientific papers
    City: 70593 - Stuttgart, Njema;ka

  7. Name of institution: Bundesforshunganstalt fur Landwirtschaft, Institut fur Pflanzenernahrung und Bodenkunde
    Type of institution: State institute
    Type of cooperation: Joint publishing of scientific papers
    City: 38116 - Braunschweig-Volkenrode, Njema;ka

  8. Name of institution: International Potash Institute Bern, c&o Kali und Salz GmbH
    Type of institution: Economical/Production
    Type of cooperation: Occasional exchange of information
    City: 34111 - Kassel, Njema;ka

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Last update: 10/05/95
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