Volume 18 no. 4 October- December 2012 - Indian Council of ...

ICAR NEWS
PROMISING TECHNOLOGIES
Carp-skin gelatin films have significantly low water
vapour and oxygen permeability than mammalian skingelatin
films, which indicate superior gas-barrier
property of the carp-skin gelatins. This property has
potential application in developing biodegradable
packaging materials also.
Optimization of the process of gelatin production from
freshwater fish skin will help in better realization of the
price by the primary producers and processors, who
can actually convert fishery waste into a significant
Pusa Hydrogel for growing healthy indoor plants
Superabsorbent polymers, specialty
polymers called hydrogels, play an
important role, in general, in
conserving water, reducing irrigation
frequency and in releasing sufficient
moisture to growing roots of
agricultural crops. These are largely
cross-linked polyacrylates.
To grow fresh-and-healthier indoor plants for a longer
time, adequate supply of water is a necessity for
maintaining their normal physiological activities and
membrane-transport processes.
Pusa Hydrogel, an indigenous superabsorbent hydrogel
technology, has been developed for improving wateruse
efficiency of agricultural and horticultural crops. Its
potential has recently been validated in an important
indoor plant, Coleus blumei; commonly known as coleus
or painted nettle. Well-rooted terminal cuttings of
Coleus were used for evaluation of Pusa Hydrogel.
The terminal cuttings were planted in plug-trays for
root development. After 18 days, uniformly rooted
cuttings were transplanted in 10 inches earthen- pots
containing 5-kg of growing medium of sand, soil and
FYM (1:1:1). To amend with the hydrogel, one kg of the
medium was left untreated and placed at the bottom
of the pot, and the remaining 4 kg was treated with
2
source of income. This has an added advantage of a
viable solution of environmental pollution in the fishprocessing
units by minimizing solid waste generated
and by providing cleaner fish-processing environment.
The maximum gelatin yield obtained from Rohu was
12.9%, followed by Common carp (12%) and Grass carp
(10.5%).
Central Institute of Fisheries Technology
Willington Island, Matsyapuri PO
Kochi (Kerala) 692 029
Coleus under different concentrations of Pusa Hydrogel
Pusa Hydrogel at 0% (T 0 ), 0.1%, (T 1 ), 0.2% (T 2 ), 0.25%
(T 3 ), 0.30% (T 4 ), 0.5% (T 5 ) on the dry-weight basis. Waterabsorption
capacity of the hydrogel amended growth
medium was calculated. Need-based quantified
irrigation water was applied to the cuttings. After
completion of the experiment, it was observed that
irrigation interval increased by 4.66 days in T 5, followed
by 3.67 days in T 4 . In control (T 0 ), irrigation was
Mean performance of Pusa Hydrogel w.r.t. water-use efficiency
in Coleus blumei after 180 days of transplanting
Treatment Total amount of Water saving Irrigation
water used (litres) interval
(litres) (days)
T 0 22.32 - 1.33
T 1 22.02 0.29 2.33
T 2 21.32 0.99 2.66
T 3 19.97 2.34 3.33
T 4 19.88 2.43 3.67
T 5 18.83 3.48 4.66
Mean performance of Pusa Hydrogel on growth related traits in Coleus blumei after 180 days of transplanting
Treatment Plant height Plant spread Stem Number of Leaf length Leaf width Number of
(cm) (cm) diameter (cm) primary branches (cm) (cm) leaves per plant
T0 44.86 30.82 8.59 5.55 9.30 7.87 34.83
T1 50.47 39.60 12.64 7.44 11.18 8.41 45.44
T2 54.00 45.19 13.62 8.11 11.73 8.70 51.55
T3 55.41 47.27 16.28 8.78 12.36 9.53 53.66
T4 57.06 48.92 17.44 9.44 13.11 10.95 58.16
T5 59.64 51.88 18.79 10.5 14.12 11.67 66.38
T 0 : Control (0 g); T 1 : 0.1% (4.0 g); T 2 : 0.2% (8.0 g); T 3 : 0.25% (10.0 g); T 4 : 0.30% (12.0 g); T 5 : 0.5% (20.0 g)