Abstract: A one-year investigation on the N and P concentration and accumulation of Cyperus malaccensis in the wetlands of Minjiang River estuary showed that the N and P concentration of C. malaccensis aboveground parts was in the order of flower > leave> stem, being higher in living plants than in dead standings, and in spring and winter than in autumn and summer; while the N and P accumulation was in the order of stem>leave>flower. The N and P concentration and accumulation of C. malaccensis below ground parts were 0〖KG-*2〗-〖KG-*7〗15 cm>15〖KG-*2〗-〖KG-*7〗30 cm>30〖KG-*2〗-〖KG-*7〗60 cm. The average N concentration and the N and P accumulation of aboveground parts were higher than those of belowground parts, while the average P concentration fluctuated throughout the year. The N accumulation reached the peak (429 g·m-2) in autumn, while P accumulation had its peak (73 g·m-2) in summer. The P concentration and accumulation were significantly lower than N (P<001). From the viewpoint of N/P ratio, N was a key element limiting the primary productivity of C. malaccensis.

Key words: Tomato, Sub-high temperature, Growth, Development, Yield, Quality