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2007, vol. 44, iss. 1, pp. 285-290
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Mineral nitrogen dynamics after the incorporation of Winter cover crops
Dinamika mineralnog azota fiakon zaoravanja ozimih međuuseva
aUniversity of Novi Sad, Faculty of Agriculture
bInstitute of Field and Vegetable Crops, Novi Sad
Abstract
In the plot trial established at the Rimski Šančevi Experiment Field of the Institute of Field and Vegetable Crops, the influence of different cover crops (forage pea, wheat, and mixture wheat + pea) and mineral N fertilizers (N1 40 kgN/ha and N2 80 kgN/ha) on NO3-n dynamics in soil has been investigated. Winter cover crops were incorporated in spring 2005 and 2006 and after that Sudan grass was sown. The highest content of NO3-M in soil at the end of vegetation period, and the highest yield was measured on the winter forage pea treatment. On the treatments with wheat and crops mixture (wheat + pea) content of NO3-N in soil during the vegetation period was lower in relation to control and other treatments. A positive significant correlation was confirmed between the content of NO3-N in soil at the end of vegetation period and yield of Sudan grass.
Sažetak
U poljskom ogledu zasnovanom na oglednom polju Instituta za ratarstvo i povrtarstvo na Rimskim Šančevima, ispitivan je uticaj međuuseva (ozimi stočni grašak, ozima pšenica, smeša ozime pšenice i ozimog stočnog graška) i mineralnog azotnog đubriva N1 (40 kgN/ha) i N2 (80 kg/ha) na dinamiku nitratnog azota (NO3-N) u zemljištu. Ozimi međuusevi su zaorani u proleće 2005. i 2006. godine, nakon čega je posejana sudanska trava. Najviši sadržaj NO3-N na kraju vegetacije sudanske trave, kao i najveći prinos, izmeren je na tretmanu sa ozimim stočnim graškom. Kod tretmana sa ozimom pšenicom i smešom pšenice i ozimog stočnog graška, tokom cele vegetacije sudanske trave izmeren je niži sadržaj NO3-N u zemljištu, u odnosu na kontrolu i druge tretmane. Između sadržaja NO3-N u zemljištu na kraju vegetacije sudanske trave i prinosa, utvrđena je pozitivna statistički značajna kvadratna zavisnost.
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References
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