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5 th Alps-Adria Workshop, 6 th -9 th March 2006, Opatija, Croatia

5 th Alps-Adria Workshop, 6 th -9 th March 2006, Opatija, Croatia. Maize yield responses to mineral fertilization Blaženka BERTIĆ, Zdenko LONČARIĆ, Vladimir VUKADINOVIĆ, Marija VUKOBRATOVIĆ, Želimir VUKOBRATOVIĆ, Tihana TEKLIĆ Faculty of Africulture in Osijek, Croatia

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5 th Alps-Adria Workshop, 6 th -9 th March 2006, Opatija, Croatia

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  1. 5th Alps-Adria Workshop, 6th-9th March 2006, Opatija, Croatia Maize yield responses to mineral fertilization Blaženka BERTIĆ, Zdenko LONČARIĆ, Vladimir VUKADINOVIĆ, Marija VUKOBRATOVIĆ, Želimir VUKOBRATOVIĆ, Tihana TEKLIĆ Faculty of Africulture in Osijek, Croatia College of Agriculture in Križevci, Croatia

  2. 5th Alps-Adria Workshop, 6th-9th March 2006, Opatija, Croatia Field trials 2002 – 2003 – 2004 Križevci Soil properties pHKCl = 4.96 humus 2.1% AL-P2O5 148 mg kg-1 AL-K2O 122 mg kg-1 Fertilization: N P K N = 80 kg N ha-1 N2 = 120 kg N ha-1 N3 = 160 kg N ha-1 N4 = 200 kg N ha-1 N5 = 240 kg N ha-1 P = 100 kg P2O5 ha-1 P2 = 200 kg P2O5 ha-1 K = 100 kg K2O ha-1 K2 = 200 kg K2O ha-1 NP NK PK PK NP NK NP PK PK NK NP NK PK NP NK

  3. 5th Alps-Adria Workshop, 6th-9th March 2006, Opatija, Croatia Field trials 2002 – 2003 – 2004 Križevci Soil properties pHKCl = 4.96 humus 2.1% AL-P2O5 148 mg kg-1 AL-K2O 122 mg kg-1 Fertilization: N P K N = 80 kg N ha-1 N2 = 120 kg N ha-1 N3 = 160 kg N ha-1 N4 = 200 kg N ha-1 N5 = 240 kg N ha-1 P = 100 kg P2O5 ha-1 P2 = 200 kg P2O5 ha-1 K = 100 kg K2O ha-1 K2 = 200 kg K2O ha-1 NP NK NPK PK N2PK PK NP NK N2PK NPK N2PK NP PK PK NK NPK NP NPK NK N2PK N2PK PK NP NPK NK

  4. 5th Alps-Adria Workshop, 6th-9th March 2006, Opatija, Croatia Field trials 2002 – 2003 – 2004 Križevci Soil properties pHKCl = 4.96 humus 2.1% AL-P2O5 148 mg kg-1 AL-K2O 122 mg kg-1 Fertilization: N P K N = 80 kg N ha-1 N2 = 120 kg N ha-1 N3 = 160 kg N ha-1 N4 = 200 kg N ha-1 N5 = 240 kg N ha-1 P = 100 kg P2O5 ha-1 P2 = 200 kg P2O5 ha-1 K = 100 kg K2O ha-1 K2 = 200 kg K2O ha-1 522 222 NP 422 NK 522 422 NPK PK N2PK 322 222 322 422 PK NP NK N2PK NPK 322 522 N2PK NP PK 222 NP N2PK NK NPK NK NPK PK 422 522 N2P2K2 N2PK 222 PK NP N3P2K2 NPK NK 322 N4P2K2 N5P2K2

  5. 5th Alps-Adria Workshop, 6th-9th March 2006, Opatija, Croatia Rainfall – mm – March – October – 2002 - 2004 618 mm 569 mm 358 mm

  6. 5th Alps-Adria Workshop, 6th-9th March 2006, Opatija, Croatia Maize kernel yield – t ha-1 618 mm 569 mm 358 mm

  7. 5th Alps-Adria Workshop, 6th-9th March 2006, Opatija, Croatia Maize kernel yield – t ha-1 – fertilization treatments

  8. 5th Alps-Adria Workshop, 6th-9th March 2006, Opatija, Croatia Maize kernel yield – 2003 – 2004

  9. 5th Alps-Adria Workshop, 6th-9th March 2006, Opatija, Croatia no N no P no K all with N all with P all with K Yield (kernel) increasing – impact of N – P – K N = [(NPK+NP+NK) – (2 X PK + 0)] / 3 P = [(NPK+NP+PK) – (2 X NK + 0)] / 3 K = [(NPK+NK+PK) – (2 X NP + 0)] / 3

  10. 5th Alps-Adria Workshop, 6th-9th March 2006, Opatija, Croatia Yield (kernel) increasing – impact of N – P – K

  11. 5th Alps-Adria Workshop, 6th-9th March 2006, Opatija, Croatia Yield increasing – N – P – K impact – 2002 – 03 – 04

  12. 5th Alps-Adria Workshop, 6th-9th March 2006, Opatija, Croatia Aboveground mass – N – P – K impact

  13. 5th Alps-Adria Workshop, 6th-9th March 2006, Opatija, Croatia Conclusions • Significant influence of M-O precipitation amount (358 – 618) and distribution • Nitrogen share in kernel yield formating increasing 60-72 % • Phosphorus share 12 – 37 % • Potassium share 3 – 16 % • More effective N fertilization in years with more precipitation

  14. 5th Alps-Adria Workshop, 6th-9th March 2006, Opatija, Croatia Thank you for your attention

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