Original scientific paper

The effect of abiotic factors, sowing density and multiple harvest to arugula yield in floating hydroponic

Nina Toth ; Agronomski fakultet Sveučilišta u Zagrebu, Zavod za povrćarstvo
Sanja Fabek ; Agronomski fakultet Sveučilišta u Zagrebu, Zavod za povrćarstvo
Božidar Benko ; Agronomski fakultet Sveučilišta u Zagrebu, Zavod za povrćarstvo
Ivanka Žutić ; Agronomski fakultet Sveučilišta u Zagrebu, Zavod za povrćarstvo
Sanja Stubljar ; Agronomski fakultet Sveučilišta u Zagrebu, Zavod za povrćarstvo
Sandi Zeher ; Bilinogojstvo, Agronomski fakultet Sveučilišta u Zagrebu

Abstract

The research valued the effect of sowing density (6 i 9 g m-2) and multiple harvest (two and three occasions) to arugula yield of “Coltivata” variety in a floating hydroponic. The effect of abiotic factors was also monitored in a year-long cultivation in a protected space during three periods of cultivation (summer, autumn – winter and spring). During 339 days of research there were conducted 24 experiments, set by the method of of randmomized block design in four replicates. The observed abiotic factors (temperature, content of dissolved oxygen, pH- and EC- value) of nutrient solution were in the range: 12.4 to 26.1 °C, 3.6 to 8.1 mg L-1, 5.4 to 6.6 and 2.7 to 3.3 dS m-1. The lowest and highest temperature of the air were in the range from 5.3 to 18.0 °C and 16.4 to 45.1 °C, and relative air humidity 48.1 to 78.9 %. The shortest production cycle (36 days from sowing to the second harvest) was in the summer period of cultivation with average values of abiotic factors: air temperature and nutrient solution 28.1 and 25.3°C, relative air humidity 53.6% and content of dissolved oxygen 5.0 mg L-1. The longest production cycle (77 days) was in the autumn – winter period of cultivation with the lowest air temperature and nutrient solution (14.2 and 15.2°C), the highest relative air humidity (73.5%) and content of dissolved oxygen (6.9 mg L-1). Higher sowing density in the 1st, 2nd and 3rd harvest resulted in 17, 30 and 50% higher yield in comparison to lower sowing density. Regardless of sowing density, the highest share in total yield (53%) was achieved in the 1st harvest, lower (29%) in the 2nd and and the lowest (18%9 in the 3rd one.

Keywords

Eruca sativa Mill.; hydroponic cultivation; system of floating panels; cultivation period; production cycle length

Hrčak ID:

163019

URI

https://hrcak.srce.hr/163019

Publication date:

2.11.2012.

Article data in other languages: croatian

Visits: 2.085 *