Aluminium in tea plantations: mobility in soils and plants, and the influence of nitrogen fertilization
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- 作者：Jianyun Ruan ; Lifeng Ma and Yuanzhi Shi
- 关键词：Al absorption ; Camellia sinensis ; Extractable Al ; Nitrogen fertilizer ; Soil acidification
- 刊名：Environmental Geochemistry and Health
- 出版年：2006
- 出版时间：December, 2006
- 年：2006
- 卷：28
- 期：6
- 页码：519-528
- 全文大小：286 KB
- 刊物类别：Earth and Environmental Science
- 刊物主题：Earth sciences
Geochemistry
Atmospheric Protection, Air Quality Control and Air Pollution
Public Health - 出版者：Springer Netherlands
- ISSN：1573-2983
文摘
The levels of extractable aluminum (Al) in soils of tea plantations, Al concentrations in tea leaves and the impact of nitrogen fertilization on these two parameters were investigated. In addition, the properties of soils from tea plantations were compared to those from soils of adjacent non-tea fields to evaluate the effect of land use conversion (from non-tea soils to tea soils). Exchangeable Al (extracted in 1 mol l−1 KCl) ranged from 0.03 to 7.32 cmolc kg−1 in 94 tea fields and decreased rapidly with increasing soil pH. In comparison with non-tea soils, tea soils had a significantly lower pH and exchangeable Mg2+ concentration but higher organic matter contents and exchangeable K+ concentration. Contents of extractable Al were not different (P > 0.05) between these two soils. The concentrations of Al in mature tea leaves correlated significantly with exchangeable Al in soil samples taken at a depth of 20–40 cm and with exchangeable Al saturations in soil sampled at␣depths of 0–20 and 20–40 cm. In the pot experiment, nitrogen fertilization significantly increased extractable Al levels but decreased soil pH and the levels of exchangeable base cations. Nevertheless, the levels of Al in mature leaves and young shoots were significantly reduced by the application of large amounts of N fertilizer.