Publication Date:
2021-05-19
Description:
The test have been conducted in 2000 m2paddy field. It is also a 2000 m 2rice. land
(only rice cultivated) have been used as a control. The rice seed of Hashemy
linecultivated including 430. numbers of Chinese carps fry being stocked at the rate
of46.5% common carp, 30.2% grass carp, 23.3 silver carp in the trial plot, for
protectiona supporting enclosure was set-up around test land. on lower part of rice
field arefugee pond with a surface of 200 m2, depth of one meter was created for
saving thefishes during drought or drying phase. After prepartion of land and planting
riceseedling in the test plot which occured in June, nearly after 30 days lapsed, on
thetime, when the water level reached almost 20 cm the fries were stocked, for
trial.Water level in concurrent with rice grouth was increased, this helped the stock
fisheasily use all parts of the space. Rice bran, wheat for live-stock fed to the culture
fish,in proprotion of 1-2 precent of total fish-biomass. The feed sooked in plastic-pan
andplaced in refugee pond.
At the begining of september when rice bushes had yellowish color and the rice seedget
hard, water level was decreased, in this situation the fishes were crowded in
refugepond, nearly one week the rice field kept dried for harvesting, subsequently the
waterlevel again rised and the fish rearing kept on until October and on the same
monththe fishes being caught. Duration of fish rearing with rice in paddy field lasted
116days, from June until October.
The period, when rice was harvested lasted 64 days (June-septcmber) and the timefor
fish rearing after rice harvesting took 52 days (Feb-Oct). In 2000 m2of rice and fish
cultivation plot, 585 kg (per ha 2955 kg) unhusked rice produced which equal to390 kg
white rice and 121 kg fishes was yielded (605 kg ha) which common carp 52kg, silver
carp 35 kg and grass carp 34 kg. Likewise, in coutrol plot, 660 kg paddy rice(per ha
3300 kg) was produced which was equal to 400 kg white rice. The results
revealed in similar surface (2000 m2), The rearing fish with rice contributed to627200
Rials further income for farmer. A generalization to one hectar land the valuereach to
3136000 Rials. In the usual practies the profite in one hectar land, under
farming of rice only bring-about 770000 Rials interest, whereas fish and rice togetherin
culture, improve the output and the yielded value is equal to 10836000 Rials.
Description:
Iranian Fisheries Science Research Institute
Description:
Published
Keywords:
Fish culture
;
Rice
Repository Name:
AquaDocs
Type:
Report
,
Refereed
Format:
16pp.
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