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Heavy metals and nitrate content in tomato fruit grown in organic and conventional production systems

100%

Ilic Z. S., Kapoulas N., Sunic L., Bekovic D., Mirecki N.

Polish Journal of Environmental Studies

2014

tom 23

nr 6

The objective of this study was to investigate whether there were any differences in the heavy metals and nitrate contents in organic and conventional tomatoes (Robin-F1, Amati-F1, and Elpida-F1). The tomato as a fruit vegetable is not characterized by high accumulation of heavy metals and nitrates. We found significantly greater concentrations of Pb, Zn, Cu, and Ni in conventional tomatoes, but we found the growing method to have no influence on cadmium Cd, Co, and Cr levels in all cultivars. In the present study, the detected levels of contaminants were found to be markedly lower than the maximum limits allowed by law. The concentrations of heavy metals in tomato fruit decreased in the order Zn>Pb>Cu>Cr>Ni>Co>Cd. This study confirms that the most important variable in the nitrate content of tomatoes is cultivar. The lowest content of nitrates is registered in the variety Elpida, especially in the organically fertilized (20 mg·kg-1). The nitrate content in this study is presented as the average of all cultivars, and it was found to be lower in organic production (29%-41%) compared to conventional production systems.

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Nutrients content and texture changes as effect of harvest time, postharvest treatments and storage condition of carrot

86%

Ilic Z. S., Sunic L., Milenkovic L., Pestoric M., Belovic M., Kevresan Z., Mastilovic J.

Acta Scientiarum Polonorum. Hortorum Cultus

2017

tom 16

nr 5

The purpose of this study was to examine the effect of harvest time (November or January) and postharvest treatments (hot water (50°C), H2O2 (1%), NaOCl (175 ppm)) and nonwashed-control of carrots (Daucus carrota L. cv. ‘Maestro F1’) on the changes in nutrient composition and texture under different storage conditions (S-1: 0°C, 98% RH; S-2: 0–2°C, 85–92% RH). Weight loss and quality changes in carrot roots were evaluated after 120 and 180 days of storage period (SP). After SP weight loss ranged from 3.20% (carrots from the first harvest in S-1 with H2O2 treatment) to 34.51% (carrots from the first harvest in S-2 with hot water treatment). Dry matter (DM) content in carrot roots varied in dependence of the harvest time (9.57– 12.22%) and increased after the SP exept in carrot from first harvest with hot water and H2O2 treatments in S-1. Total sugar content (TSC) increased after SP, more in S-2 cooling room. Vitamin C content in carrot roots decreased more in S-2 (20.7–52.3%) in comparison to S-1 storage conditions (2.0–18.2%). The hardness and flexibility of carrot roots increased after SP for all treatments. Prestorage washing treatments (H2O2 or NaOCl) and storage in S-1 storage regime at temperature (0°C) with a high relative humidity 98% maintained quality of carrot root.

Ograniczanie wyników

1 Acta Scientiarum Polonorum. Hortorum Cultus

1 Polish Journal of Environmental Studies

2 Ilic Z. S.

2 Sunic L.

1 Bekovic D.

1 Belovic M.

1 Kapoulas N.

1 Kevresan Z.

1 Mastilovic J.

1 Milenkovic L.

1 Mirecki N.

1 Pestoric M.

1 2017

1 2014

Wyniki wyszukiwania

Heavy metals and nitrate content in tomato fruit grown in organic and conventional production systems

Nutrients content and texture changes as effect of harvest time, postharvest treatments and storage condition of carrot