Naslov
Effects of Fertigation with Nitrogen on Growth and Cropping of 'Elstar' Apple Trees

Autori
Čmelik, Zlatko ; Tojnko, Stanislav

Izvornik
HortScience (0018-5345) 39 (2004), 4; 775-776

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, kongresno priopcenje, znanstveni

Ključne riječi
Malus domestica; mineral nutrition; growth; yield; alternate bearing

Sažetak
The trial was conducted in a 'Elstar'/M9 orchard (2500 trees/ha) and the experiment was designed as a split-block comprising five treatments (fertigation with 45 kg N/ha, 60 kg N/ha, 120 kg N/ha, irrigation without fertilisers, and control - without irrigation and without fertilisers), and two timing variants (treatments during vegetation period from 1 May to 20 June - variant A, and treatments from 1 May to 1 August - variant B). The treatments were imposed beginning in the second year after planting and lasted five years. Fertigation with different amounts of nitrogen had no consistent effect on tree growth, cumulative yield and yield efficiency, however, treatments had a significant influence on regularity of bearing. The index of alternate bearing varied with treatment, but in both variant was significantly higher in control and in treatment with irrigation without application of fertiliser. These results demonstrated that the natural tendency of 'Elstar' to alternate bearing could be broken by the different rates of nitrogen applied by fertigation.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA