REMOVAL AND LEACHING OF NUTRIENTS BY SALVIN1A MOLESTA MITCHEL AND EICHHORNIA CRASSIPES (MART.) SOLMS

Y.C. WEE

Abstract


Profuse growth of Eichhornia crassipes and Salvinia molesta in Singapore reservoirs required their regular
manual removal as their prolonged presence can lead to deterioration in the quality of the potable water.
Clearing of the reservoir catchments, together with regular removal of the weeds and dumping them away
from the catchments, should, in the long term, reduce their presence in the reservoirs. Laboratory experiments
showing the removal of chloride, sulphate, phosphorus and nitrate from the growing medium and the release of
chloride, phosphorus and nitrate by rotting plants should convince the administrators of the benefit of proper
management of the problem.

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DOI: http://dx.doi.org/10.11598/btb.1989.0.2.95

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