engleski

Environmental and production aspects of maize cultivation in relation with the different time- applied nitrogen

In order to determine the influence of nitrogen fertilization on status of mineral nitrogen in soil and yield of maize two stationary field experiments were set up in Croatian Pannonia agricultural region in vicinity of Vukovar city. Field trials include four fertilizer treatments in four replications. The treatments are: (i) Fall (autumn) - 180 kg N/ha, (ii) Spring (pre- plant) - 180 kg N/ha, (iii) Fall and spring – 70 kg N/ha in fall and 110 kg N/ha in spring, (iv) Fall, spring and topdressing - 70 kg N/ha in fall, 70 kg N/ha in spring and 40 kg N/ha in topdressing application. Results of two-year studies at two location reviled that treatments did not significantly affected on maize grain yield and they were in the range of 13.4 t/ha to 14.0 t/ha in 2014 and 10.1 t/ha to 11.3 t/ ha in 2015 at Vukovar location and 16.2 t/ha to 16.9 t/ha in 2014 and 8.3 t/ha to 8.8 t/ha in 2015 at Belje location. The relatively highest grain yields in both years of investigations and on both locations were achieved with the application of all nitrogen in the fall. Although the fall nitrogen applications is not recommended due to greater risk of N loss, results of nitrogen content up to 90 cm soil depth show that different nitrogen application time did not significantly influenced on nitrogen accumulation in soil. Fall (autumn) fertilizer application has relatively contributed an increscent of nitrate nitrogen accumulation in soil.

Fertilization ; Soil ; Mineral nitrogen ; Environment ; Yield

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