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Effect of polymer supersorbent added to medium on the content of mineral elements in strawberry leaves and fruit

100%
Mikiciuk G., Mikiciuk M.
Journal of Elementology
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2010
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tom 15
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nr 2
313-319
The aim of the study was to evaluate the influence of polymer supersorbent AgroHydrogel, added to soil, on the content of some mineral elements in leaves and fruit of strawberry cv. Elsanta. In 2007-2008, a pot experiment set up in a system of complete randomization was carried out in four replications in a greenhouse of the West Pomeranian University of Technology in Szczecin. The experimental factor was the addition of two doses of AgoHydrogel to the medium. The two rates were 1.8 and 3.6 g dm–3, i.e. 15 and 30 g per a Kick’s pot versus the control which was the medium with no gel. The experiment was carried out indoors. Soil moisture was measured by means of contact soil tensometers. The plants were watered with 0.5 dm3 per pot and the tensometer, fitted in the medium with 15 g of gel per pot, showed 450 hPa. The content of the elements in strawberry leaves and fruit was determined by means of the AAS method. The applied polymer supersorbent decreased the cummulation of zinc and lead in leaves and copper, nickel and lead in fruit of strawberry. This effect particularly visible in plants growing in the medium with an increased dose of hydrogel. However, the application of AgroHydrogel did not affect the content of iron, manganese, copper and nickel in leaves and manganese, zinc and iron in fruit of the analyzed variety of strawberry.
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Evaluation of the direct and subsequent influence of a supersorbent polymer on cropping and rate of gas exchange of strawberry [Fragaria ananassa Duch.] 'Elsanta'

80%
Mikiciuk G., Mikiciuk M.
Journal of Fruit and Ornamental Plant Research
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2010
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tom 18
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nr 2
93-108
In the years 2007-2008, a pot experiment was carried out on the effect of a supersorbent polymer on cropping and rate of gas exchange of 'Elsanta' strawberry. The experiment took place in the Vegetation Hall of the West Pomeranian Techno­logical University in Szczecin and was done in a completely randomized design. The experimental factors were two doses (8 and 3.6 gdm-3) of gel polymer AgroHy- droGel, added to the medium prior to planting. Its direct (in 2007) and subsequent (in 2008) effect on the amount and quality of crops and the physiological activity of strawberry was assessed. It was found out that a larger applied dose of supersorbent caused a decrease in the strawberry yield. The differentiated doses of AgroHydroGel did not have any significant influence on the weight of an individual fruit (7.89-9.3 g) and on longitudinal (27.5-30.0 mm) and crosswise diameter (27.5-29.3 mm). Re­cordings were made of the increase in the dose of AgroHydroGel, the increase in the content of the extract and L-ascorbic acid, and the decrease in accumulation of ni­trates and nitrites, in strawberry fruit. A direct influence of the applied polymer on the increase in CO2 assimilation in strawberry leaves at the fruiting stage was ob­served. In the first year of the studies, the intensity of transpiration in the phases of fruiting and after fruiting was increased along with the increase in the doses of Agro- HydroGel, whereas in the subsequent year such a relationship was observed in the phase of flowering. The largest index of effectiveness of water use, in the photosyn­thesis in the subsequent year in all the growth phases, was characteristic of the control plants.
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