@techreport{fdi:31519,
  title = {{B}iology and management of the flood water ecosystem in tropical wetland ricefields},
  author = {{R}oger, {P}ierre-{A}rmand},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he first part of the review deals with the components of the ecosystem (floodwater, photosynthetic aquatic biomass, and fauna), their properties and activities. {V}ariations of the major physical and chemical properties of the flloodwater (temperature, p{H}, {O}2 concentration, {N} content...) during the crop cycle are summarized. {T}he section on photosynthetic aquatic biomass considers composition, nutrient contribution, and effects on {N} dynamics, namely: biological {N}2 fixation, {N} immobilization, {N} recycling, {N} accumulation at the soil surface, {N} supply to the rice crop, and {N} losses by {NH}3 volatilization in relation to p{H} increase due to photosynthetic activity in the floodwater. {T}he section on fauna emphasizes grazing and nutrient recycling by ostracods and snails, and the role of tubificid worms on floodwater ecology. {T}he second part deals with the agronomic management of the floodwater ecosystem. {I}t reviews the effects of crop intensification on floodwater ecology and cultural practices that take advantage of the agronomic potential of the floodwater ecosystem. ({R}{\'e}sum{\'e} d'auteur)},
  keywords = {{ECOSYSTEME} ; {RIZIERE} ; {FACTEUR} {ECOLOGIQUE} ; {PRODUCTION} {PRIMAIRE} ; {CYCLE} {DE} {L}'{AZOTE} ; {MICROFAUNE} ; {FERTILISATION} {DU} {SOL} ; {BIOMASSE} {PHOTOSYNTHETIQUE} {AQUATIQUE}},
  address = {{M}anille},
  publisher = {{IRRI}},
  series = {},
  pages = {28  multigr.},
  year = {1989},
  URL = {https://www.documentation.ird.fr/hor/fdi:31519},
}