Naslov
Reakcija pšenice na gnojidbu dušikom
(Response of wheat to nitrogen fertilizatuin)

Autori
Gašpar, Ivan ; Šeput, Miranda ; Kovačević, Vlado

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, ostalo

Izvornik
Congres Guide and Abstracts; Fertilization forSustainable Plant Production and Soil Fertility / Van Cleemput, O. - : Universiteit Gent - C.I.E.C., 1997, 149-149

Skup
11 thWorld Fertilizer Congress

Mjesto i datum
Gent, Belgija, 07.09.1997. - 13.09.1997

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
pšenica; gnojidba genetska specifičnost; dušik
(wheat; fertilizer; genetic of specificum; nitrogen)

Sažetak
Wheat cultivar Zitarka was grown under field conditions for three growing seasons (1992/1993, 1993/1994 and 1994/1995) on the experimental field of Belje holding (locality Bizovac, near Osijek). Experimental field is classified as hydromorfic soil of characteristics as follows: pH in H2O = 7.4; humus content = 1.73%, plant available P and K (determination by AL-method) = 21.3 mg P2O5 and 27.5 mg K2O/100 g of soil, total N = 0.22%. The field experiments were conducted in four replications with randomized block design (experimental plot of fertilization = 50m2). Eleven treatments were tested as follows: a) unfertilized plot; b) = 0 kg N + 150 kg P2O5 + 100 kg K2O/ha; c) 80 kg N + 150 kg P2O5 + 100 kg K2O/ha (in form NPK 10:30:20 and urea - incorporation in soil by tillage ); eight treatments from d to k) = c + 120 kg N/ha added by top dressings. Differences among these eight treatments were in source of nitrogen (AN=ammonium nitrate, CAN=calcium ammonium nitrate, UAN=urea ammonium nitrate and U=urea) and their distributions (two dressings in three leaf stage and tillering: 60 + 60 kg N/ha; inclusion of the third dressing in shooting stage: 30 + 60 + 30 kg N/ha). Mean grain yields of wheat were 5.05 t/ha, 6.14 t/ha and 5.12 t/ha, for the first, the second and the third year of testing, respectively. Unfertilized plots yielded 3.54 t/ha and those of P and K fertilization 3.59 t/ha (three-year means), while application of 80 kg N/ha prior to sowing increased yield by 33% (4.74 t/ha) in comparison with mean of two N unfertilized treatments. By additional application of 120 kg N/ha with dressings, grain yields increased by 26% (mean 5.99 t/ha) in comparison with 80 kg N/ha application. However, in the individual years of testing, these increases were 48%, 38% and 0%, respectively. Concerning the source of N applied, it was found also specific response of wheat depending on the growing season. In purpose of finding more reliable conclusions, these investigations will be continued under different environmental conditions (soil types).

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

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