Effects of chernozem water regime and fertilising on maize yields under conditions of direct sowing | Uticaj vodnog režima černozema i đubrenja na prinos kukuruza u uslovima direktne setve
2011
Kresović, B., Institut za kukuruz Zemun Polje, Beograd - Zemun (Serbia) | Dragičević, V., Institut za kukuruz Zemun Polje, Beograd - Zemun (Serbia) | Videnović, Ž., Institut za kukuruz Zemun Polje, Beograd - Zemun (Serbia)
The results obtained in the ten-year trial (2000-2009) carried out under agro-ecological conditions of Zemun Polje (Serbia) are presented in this study. The objective was to determine effects of soil water regime (A) and the fertilizer rates (B) on the yield of maize directly sown in chernozem. The trial was set up according to the block design under conditions of rain fed and irrigation with the three NPK levels: B1 - without fertilization; B2 - 150 kg nitrogen/ha, 105 kg phosphorus/ha and 75 kg potassium/ha; B3 - 300 kg nitrogen/ha, 210 kg phosphorus/ha and 150 kg potassium/ha. Maize was sown with the John Deere–7200 MaxEmerge 2 planter. Results were processed by the factorial analysis of variance and the LSD test, while the dependence of the yield on the water regime was established by the regression analysis. Obtained results showed that the formation of yield had been significantly affected by the water regime and fertilizing. The average yield amounted to 7.25 t/ha and 9.31 t/ha under rain fed and irrigation conditions, respectively. The following yields were obtained on the average over fertilizing variants: B1- 6.46 t/ha, B2- 8.74 t/ha and B3- 9.64 t/ha. The yield of 7.74 t/ha can be expected in the variant B1, if 450 mm of water enters the soil surface during the growing season. With 20 mm more water the yields expected in variants B2 and B3 could be 10.60 t/ha and 11.70 t/ha, respectively.
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