A talaj kadmium szennyezettségének vizsgálata angolperje (Lolium perenne L.) bioteszttel
| Autor: | Dávid Mónok, György Füleky |
|---|---|
| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Agrokémia és Talajtan. 66:333-347 |
| ISSN: | 1588-2713 0002-1873 |
| DOI: | 10.1556/0088.2017.66.2.3 |
| Popis: | Cadmium accumulation in soils causes ecological, biological and human health risks. Previous studies have shown that reductions in the shoot height and fresh biomass of ryegrass (Lolium perenne L.) are a sensitive indicator of the cadmium pollution level in soils. Four soils with different types and properties were included in the experiment. In the first period of the biotest, 2 g cotton-wool pads moistened with distilled water were planted with 2 g of perennial ryegrass seeds and the seedlings were grown for 6 days. On the 7th day the cotton-wool pads containing the seedlings were placed on soils polluted with four levels of cadmium: 0, 1, 2 and 4 mg Cd kg−1 soil, added to the soil in the form of cadmium acetate. After a first nutrient-deficient period, the seedlings took up nutrients and toxic substances intensively from the soil samples. After a 14-day period of soil–plant contact the fresh biomass, dry biomass and Cd concentration of the shoots were measured, in addition to which the shoot height was measured every 2 days. Cadmium treatment significantly reduced the shoot height and fresh weight of ryegrass in all the tested soils, and the damaging effect was proportional to the applied dose. A reduction of more than 10% in the shoot height and fresh weight were observed even at a Cd pollution level of 1 mg Cd kg−1 soil. At the highest Cd level the decrease in shoot height was more than 40% and the decrease in fresh weight more than 35% in all the soils. The increasing level of Cd application significantly increased the Cd concentration of the shoots. More Cd was accumulated in ryegrass shoots on soils with low pH and low organic matter content. The results indicate that the ryegrass biotest method is suitable for the characterization of Cd contamination in different soils. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|