Abstract
<p>In this research, the possibility of the production of rocket and parsley which have short production cycle and baby leaf vegetable, in floating system to reduce the concentration of nutrient solution; determination of the effects of yield, quality and leaf nutrient content was aimed. Research was carried out during the autumn and spring production seasons of 2010-2011. Standard nutrient solution ((mM) 12 N-NO<sub>3</sub>, 3.8 N-NH<sub>4</sub>, 2.8 P, 8.4 K, 3.5 Ca, 1.4 Mg, 9.5 Na, 8.0 Cl, 2.7 S, 0.04 Fe) was used as full dose (control treatment) and compared to half dose (1/2 dose) Hoagland nutrient solution. Both of the seasons in total yield were changed between rocket 975.81-1612.15 g m<sup>-2 </sup>and parsley 875.50-1093.50 g m<sup>-2 </sup>respectively. The results showed that using of floating system in Rocket and Parsley cultivation was successful and reduced the concentration of nutrient solution; variety and growing season at rates ranging from 13.7% to 24.8% compared to have showed reduce the yield. In this study, the effect of treatments to some quality parameters (dry weight, vitamin C, nitrate, pH ve EC) and nutrients removed by plant were determined. In addition, it was found that these values increased with increasing with the concentration of nutrient solution; however, vitamin C decreased in Parsley cultivation. When the results evaluated as a whole, it was concluded that using ½ doses decreased yield, some savings could be achieved in terms of nutrient solution consumed by the plant with the negative impact on the environment.</p>
Highlights
Hydroponic systems are cultivation technologies that use nutrient solutions rather than soil substrates
The possibility of the production of rocket and parsley which have short production cycle and baby leaf vegetable, in floating system to reduce the concentration of nutrient solution; determination of the effects of yield, quality and leaf nutrient content was aimed
The results showed that using of floating system in Rocket and Parsley cultivation was successful and reduced the concentration of nutrient solution; variety and growing season at rates ranging from 13.7% to 24.8% compared to have showed reduce the yield
Summary
Hydroponic systems are cultivation technologies that use nutrient solutions rather than soil substrates. Rocket and parsley, which are the two types of leaves edible vegetables whose usage is ever-increasing in our country, are grown in Mediterranean and Southern European countries These vegetables whose fresh leaves can be used for consuming as salad and garnish (Vernieri et al, 2006; Rodriguez-Hidalgo et al, 2010) can be grown all year round (Vural et al, 2000). In this study, searching the possibilities of using floating water culture, which is an easy and cost-effective technique for small-scale and valuable vegetable species, for rocket and parsley breeding in autumn and spring months under the unheated greenhouse conditions and determining the effects of decreasing the nutrient solution concentration according to the growth periods are the main goals
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