Calcium, Magnesium, Potassium and Phosphorus contents in reclaimed marsh soil from Zhejiang Province, P.R. China

摘要

The worldwide annual fluvial discharge amounts to 7.109 t and Asian rivers carry about 75 % of this fluvial sediment load (Pye, 1994). The Yangtze River is an important source of sediments for the continental shelf of the East China Sea (Liu et al., 2002) and carries 480.106 t of sediment per year to the estuarine and coastal area at its mouth nearby the city of Shanghai. Between 25 % and 50 % of the suspended material are deposited close to the river mouth (Liu et al., 2002; Chen et al., 2001).