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Effects of nitrogen and phosphorus availability on the decomposition of aquatic plants
Xie, Y.; Yu, D.; Ren, B. (2004). Effects of nitrogen and phosphorus availability on the decomposition of aquatic plants. Aquat. Bot. 80(1): 29-37
In: Aquatic Botany. Elsevier Science: Tokyo; Oxford; New York; London; Amsterdam. ISSN 0304-3770, more
Peer reviewed article  

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Keywords
    Aquatic plants; Degradation; Nitrogen; Phosphorus; Eichhornia crassipes (Mart.) Solms [WoRMS]; China, People's Rep., Hubei Prov., Wuhan, Donghu L; Fresh water

Authors  Top 
  • Xie, Y.
  • Yu, D.
  • Ren, B.

Abstract
    The responses of decomposition to nitrogen (N) and phosphorus (P) supply were investigated in three leaf species: Eichhornia crassipes, Vallisneria natans, and Potamogeton maackianus. Decomposition was fastest in E. crassipes (0.047-0.099 day−1, intermediate in V. natans (about 0.030 day−1), and slowest in P. maackianus (about 0.010 day−1). Increase in P-availability increased the decomposition rate of E. crassipes by 68-87%, whereas the impact of N-availability alone was insignificant. Both N- and P-availability in waters had no significant impact on the decomposition rates of V. natansand P. maackianus (P > 0.05). The effects of P-availability on the N and P content levels of the three species were significant (P < 0.01), except for the impact on N content of V. natans (P = 0.526). In contrast, environment N-availability was insignificant. These results indicate that the responses of decomposition to nutrient availability depend on plant species and nutrient type. P-availability has stronger effects on litter nutrient dynamics than N-availability.

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