Comparison of ammonium fertilizers, EDTA, and NTA on enhancing the uptake of cadmium by an energy plant, Napier grass (Pennisetum purpureum Schumach)
| Autor: | Mingkuang Wang, Guo Wang, Fenglin Zhong, Li Hu, Yanhui Chen, Yuwen Deng, Bo Xu, Mengjiao Liu |
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| Rok vydání: | 2017 |
| Předmět: |
021110 strategic
defence & security studies Ammonium sulfate Cadmium biology Stratigraphy Ammonium nitrate fungi 0211 other engineering and technologies Nitrilotriacetic acid food and beverages chemistry.chemical_element 02 engineering and technology 010501 environmental sciences biology.organism_classification 01 natural sciences chemistry.chemical_compound Horticulture chemistry Agronomy Shoot Ammonium chloride Ammonium Pennisetum purpureum 0105 earth and related environmental sciences Earth-Surface Processes |
| Zdroj: | Journal of Soils and Sediments. 17:2786-2796 |
| ISSN: | 1614-7480 1439-0108 |
| Popis: | The aim of this study was to quantify the effect of enhanced agronomic practices on cadmium (Cd) accumulation in the high-biomass energy plant Napier grass (Pennisetum purpureum Schumach). Potted-plant experiments were performed to investigate the effects of ammonium fertilizers and chelating agents, alone or in combination, on the growth, accumulation of Cd, and phytoextraction efficiency of P. purpureum on Cd-contaminated soil. The fertilizers included ammonium nitrate, ammonium sulfate, and ammonium chloride. The chelating agents included ethylenediaminetetraacetic acid (EDTA) and nitrilotriacetic acid (NTA). The addition of ammonium fertilizers and chelating agents generally stimulated growth of P. purpureum, and the shoots accounted for 90.1–94.1% of the total biomass. The concentrations of Cd in different parts of P. purpureum plants were in the order root > leaf > stem. Ammonium chloride alone showed effectiveness in increasing root and shoot Cd concentrations compared to other amendments alone. Both EDTA alone and NTA alone significantly decreased root Cd concentration and increased shoot Cd concentration, while EDTA alone was more efficient on shoot and total Cd accumulation than that by NTA alone. The total accumulation of Cd in P. purpureum ranged from 1.10 to 2.05 mg per plant with 47.3–73.5% of Cd accumulation concentrated in shoots. The results indicate that P. purpureum can remove more Cd through phytoextraction than that by other hyperaccumulators. Ammonium chloride led to the highest total Cd accumulation. Ammonium chloride applied alone or in combination with either EDTA or NTA resulted in the most effective agronomic approaches for P. purpureum phytoextraction of soil Cd. |
| Databáze: | OpenAIRE |
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