ISHS Acta Horticulturae 379: International Symposium on Quality of Fruit and Vegetables: Influence of Pre- and Post- Harvest Factors and Technology
THE EFFECT OF ORGANIC MATTER IN SOIL ON THE LEAD LEVEL IN EDIBLE PARTS OF LETTUCE AND CARROT |
| Author: | M. Gaweda |
| Abstract:
Two-year (1991, 1992) pot experiments were carried out to estimate the influence of organic matter in soil on the lead accumulation by lettuce and carrot. Peat was the organic component of the soils (0, 3 and 8% d.w.), sand the mineral one. Three lead doses: 0, 300, 600 mg/dm3 of soil were introduced using lead acetate. Seedlings of two lettuce cvs Syrena and Debata and two carrot hybrids Karo F1 and Kama F1 were planted into Mitscherlich pots. The plants were subject to morphological measurements, as well as analyses of lead, macro- and microelements and chosen organic constituents. The organic matter strongly limited lead accesibility for investigated vegetables. In the plants from the richest soil only 56–38% of this metal amount present in the material from mineral base (lettuce) or 39–305 (carrot) was found. The differences in the accumulation of lead between the cvs were shown. In the experimental conditions plants demonstrated no external symptoms of lead toxicity, but in vegetables from contaminated soils significant changes in the mineral composition as well as in the contents of organic compounds in comparison with "healthy" plants were confirmed. The decrease in these constituents was almost only observed in plants grown in soil without organic matter. | |
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