Demonstration of a new indicator for studying upwelling in the northern South China Sea**This research was supported by the projects of knowledge innovation program of the Chinese Academy of Sciences (No. KZCX2-YW-Q07-02, No. KSCX2-SW-132 and No. KSCX2-YW-Z-1024), the National Natural Science Foundation of China (41076070) and the National 908 project (No. 908-02-04-04).
Abstract:From April 2008 to November 2009, the nitrogen (N) cycle of plant-soil system in seepweed (Suaeda salsa) wetland in the intertidal zone of the Huanghe (Yellow) River estuary was studied. Results showed that soil N had significant seasonal fluctuations and vertical distribution, and the net N mineralization rates in topsoil were significantly different in growing season (p < 0.01). The N/P ratio (9.87 ± 1.23) of S. salsa was less than 14, indicating that plant growth was limited by N. The N accumulated in S. sa… Show more
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