Glasnik Zaštite Bilja, Vol. 33 No. 6, 2010.
Izvorni znanstveni članak
Agronomic traits of tomato at different ammonium nitrate concentrations in the nutrient solution
Božidar Benko
; Agronomski fakultet Sveučilišta u Zagrebu, Zavod za povrćarstvo
Josip Borošić
; Agronomski fakultet Sveučilišta u Zagrebu, Zavod za povrćarstvo
Bruno Novak
; Agronomski fakultet Sveučilišta u Zagrebu, Zavod za povrćarstvo
Ana Radošević
; Studij Bilinogojstva, usmjerenje Vrtlarstvo, Agronomski fakultet Sveučilišta u Zagrebu
Sažetak
The aim of this research was to determine the agronomic traits of two tomato cultivars grown in soilless culture on rockwool, fertigated with the standard and 50 % increased ammonium nitrate concentration in the nutrient solution. During the harvest period, fruits from 8 clusters shortened to 5 fruits were harvested. Fruit weight and marketable yield per cluster and in total, the number of marketable and unmarketable fruits per m2 and share of unmarketable fruits with blossom-end rot symptoms were determined. Between 99.2 and 112.0 marketable fruits was harvested per m2, while the share of unmarketable fruits varied from 5.42 to 8.38 %. Both cultivars developed larger fruits in all clusters when they were fertigated with the standard nutrient solution. During the harvest period they developed fruits which weighed between 205 to 207 g, respectively. Cv. ‘Buran’ fertigated with the standard nutrient solution has developed the highest fruit weight (220 g). The same cultivar has achieved a 7.24 % higher marketable yield than cultivar Belle (21.40 kg/m2). Fertigation with the standard nutrient solution resulted in 13.79% higher yield compared to the solution with higher NH4NO3 concentration (20.74 kg/m2). The highest total marketable yield (24.55 kg/m2) was achieved by cv ‘Buran’ fertigated with the standard nutrient solution, while the lowest (20.13 kg/m2) was achieved by cv. ‘Belle’ fertigated with nutrient solution that contained higher concentration of ammonium nitrate. Because of the higher fruit weight and marketable yield, and also the lower unmarketable fruits share was achieved with the standard nutrient solution, increasing the ammonium nitrate concentration for beefsteak cultivars is not recommended.
Ključne riječi
Lycopersicon esculentum Mill.; soilless culture; fruit weight; marketable yield
Hrčak ID:
163328
URI
Datum izdavanja:
14.12.2010.
Posjeta: 832 *