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Volume 25 Issue 1
Nov.  2011
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Article Contents
DU Jing, CHANG Zhi-zhou, YE Xiao-mei, HUANG Hong-ying. Losses in nitrogen,phosphorus and potassium of water hyacinth dehydrated by mechanical press[J]. Fujian Journal of Agricultural Sciences, 2010, 25(1): 104-107.
Citation: DU Jing, CHANG Zhi-zhou, YE Xiao-mei, HUANG Hong-ying. Losses in nitrogen,phosphorus and potassium of water hyacinth dehydrated by mechanical press[J]. Fujian Journal of Agricultural Sciences, 2010, 25(1): 104-107.

Losses in nitrogen,phosphorus and potassium of water hyacinth dehydrated by mechanical press

  • Received Date: 2009-06-28
  • Rev Recd Date: 2009-08-17
  • Publish Date: 2010-02-15
  • An experiment was carried out to investigate the effect of dehydration by mechanical press on water removal and NPK losses.The results showed that when the pressure increased from 0 MPa to 12MPa,the moisture content was reduced from 94.72% to 68.90%.The dehydration rate was up to 91.27% and the dry matter loss was up to 29.31%.The leached NPK increased as the pressure increased.Under a pressure up to 12MPa,the maximum losses in NPK were 52.28%,47.83% and 84.83%,respectively.The rates of loss on different nutrients were: total N(Kjeldahl nitrogen)(71.00%)> inorganic nitrogen(42.97%),water-soluble P(68.90%) > organic P(45.03%) and water-soluble K(84.75%).The nutrient losses in water hyacinth under the mechanical press were closely related to the nutrients' water solubility.
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