The bioavailability of Al in soils to tea plants |
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| Institution: | 1. Department of Forest Ecology and Reclamation, Institute of Forest Ecology and Silviculture, Faculty of Forestry, University of Agriculture in Krakow, Al. 29-go Listopada 46, 31-425 Kraków, Poland;2. Department of Hydrology, Institute of Geography and Spatial Management, Jagiellonian University in Krakow, Gronostajowa 7, 30-387 Kraków, Poland;1. College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China;2. School of Nuclear Science and Technology, University of South China, Hengyang 421001, China;3. Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China;4. Department of Plant and Soil Sciences, University of Delaware, Newark, DE 19716, USA;5. Department of Geology and Geophysics, Yale University, New Haven, CT 06520, USA;6. School of Civil & Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;7. Key Laboratory for Paleobiology, Yunnan University, Kunming 650091, China |
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| Abstract: | In order to understand the relationship between forms of Al in soils and the uptake of Al from soil into tea plants, tea leaves and soils were collected from 13 tea gardens in the east of China. The Al concentration measured in the tea leaves was found to be best predicted by ‘available’ Al extracted by 0.02 M CaCl2. The relationship appears to be linear, with a correlation coefficient of 0.77 (P=0.01). The Al content of tea leaves increases with a decrease of soil pH. This relationship is non-linear with a marked increase in leaf Al for soils with pH <5.0. The amounts of Al in soils extracted with 0.02 M CaCl2 was much less than other forms of Al in soils. The amount of Al measured in the tea leaves was directly related to both the ‘available’ form of Al in the soils and soil pH. Soil pH was identified as a major factor that controls the uptake of Al from soil into the tea leaves. |
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