Naga
- The *ICLARM Quarterly
Vol.
25, No. 1 (January March 2002)
Aquabyte
Pig
Dung as Pond Manure: Effect on Water Quality,
Pond Productivity and Growth of Carps in Polyculture
System
A.
Dhawan and S. Kaur
Abstract
Pig dung was used as manure at 18 and 36 t/ha/year
in carp polyculture (without supplementary feeding)
for 270 days. It was observed that pig dung at
both the levels did not degrade the physico-chemical
properties (pH, dissolved oxygen and alkalinity)
of water. The nutrient (phosphates and nitrates)
level of water was higher in manured ponds than
control ponds (no manuring, only supplementary
feeding). Further, plankton levels (phyto- and
zooplankton) were also significantly higher in
manured ponds. The growth of Catla catla
and Labeo rohita was significantly more
in manured ponds than in control ponds. Growth
of Cirrhinus cirrhosus and Cyprinus
carpio was significantly more in ponds manured
with pig dung at 18 t/ha/year than in control
ponds and the growth of Ctenopharyngodon idellus
was significantly more in control than in manured
ponds.
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