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  1. NTU Scholars
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Please use this identifier to cite or link to this item: https://scholars.lib.ntu.edu.tw/handle/123456789/340496
Title: Soil and phosphorus redistribution along a steep tea plantation in the Feitsui reservoir catchment of northern Taiwan
Authors: Zehetner, Franz
Vemuri, Narasimham L.
Huh, Chih-An
Kao, Shuh-Ji
Hsu, Shih-Chieh
Huang, Jr-Chuan
Chen, Zueng-Sang
JR-CHUAN HUANG 
ZUENG-SANG CHEN 
Keywords: Cs-137; Deposition; Erosion; Pb-210; Radionuclide
Issue Date: 2008
Journal Volume: 54
Journal Issue: 4
Start page/Pages: 618-626
Source: Soil Science and Plant Nutrition 
Abstract: 
Feitsui reservoir, the major water supply of Taipei city, has shown declining water quality in recent years. The reservoir is located in an area famous for tea cultivation, and the question arises as to whether the hillside tea plantations have contributed to increased sediment and nutrient discharge into the reservoir. In this study, soil and phosphorus redistribution were examined along a steep tea plantation in the reservoir's catchment and the provenance of reservoir sediment was assessed. Fallout radionuclides were used as soil erosion/deposition tracers and as markers of sediment sources. Continuous fertilizer application has raised (inorganic) phosphorus levels in the studied tea plantation. The plantation's narrow bench terraces trap eroded material and slow down soil and nutrient translocation. Nevertheless, eroded soil and phosphorus have accumulated on a vegetated toeslope below the tea plantation. The reservoir sediment contained significant amounts of inorganic phosphorus and cesium-137, and application of a mixing model resulted in a surface soil contribution of approximately 30%. This points towards tea plantations as possible sediment and pollutant sources and underlines the necessity of soil conservation strategies, such as the maintenance of vegetated riparian buffer zones. However, other sources, such as landslide debris and urban wastewaters, cannot be entirely ruled out. Further research is needed to better characterize the catchment's soils and sediments and to improve sediment fingerprinting efforts. Potential point and non-point pollution sources need to be examined in detail to better understand how phosphorus enters the reservoir. © 2008 Japanese Society of Soil Science and Plant Nutrition.
URI: http://scholars.lib.ntu.edu.tw/handle/123456789/340496
DOI: 10.1111/j.1747-0765.2008.00268.x
Appears in Collections:地理環境資源學系

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