Aluminium in tea plantations: mobility in soils and plants, and the influence of nitrogen fertilization
文献类型: 外文期刊
第一作者: Ruan, Jianyun
作者: Ruan, Jianyun;Ma, Lifeng;Shi, Yuanzhi
作者机构:
关键词: al absorption;camellia sinensis;extractable al;nitrogen fertilizer;soil acidification
期刊名称:ENVIRONMENTAL GEOCHEMISTRY AND HEALTH ( 影响因子:4.609; 五年影响因子:4.677 )
ISSN:
年卷期:
页码:
收录情况: SCI
摘要: 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 cmol_c 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 Mg~(2+) 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.
分类号: X142
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