Abstract
Zizania latifolia is one of the most common emergent species in east Asia, occurring along the littorals of freshwater marshes and streams. This study is aimed at more information on Z. latifolia for further mechanistic understanding the competition between Z. latifolia and others from the view of carbon and nutrient cycle with its mophorogical changing. Carbohydrates were, continuously translocated downwards from April to May, slightly later than the beginning of the growing season, then peaking in August at 10 to 17gC/m2 day, and lasted until November. The downward translocation amounted at about 20 to 60% of the net production until August, while from August to September almost all net production was mobilized into the rhizome system. After the senescence of shoots until the emergence of new shoots in March, the rhizome TNC stock substantially decreased due to respiration loss, while there was only slight loss in TSC, attributed to the mortality. These corresponded to the peaks in the downward translocation respectively due to the intensive shoot mortality in spring and the starting of senescence.
