Effect of sugarcane byproduct- pressmud incorporated diets in semi-intensive carp polyculture system
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Date
2014
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Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana
Abstract
An experiment was conducted to assess the efficacy of pressmud (sugarcane byproduct) incorporated diets in a semi-intensive carp polyculture system. Diets were prepared by 15% (D2), 20% (D3), 25% (D4) and 30% (D5) replacement of rice bran with pressmud in control diet-D1 (de-oiled rice bran and mustard meal in the ratio 1:1). Experimental diets were fed to carp fry (Catla catla, Labeo rohita, Cirrhinus mrigala and Cyprinus carpio) stocked in 80m2 outdoor cemented tank (@ 10000/ha) for 180 days. Pressmud incorporation had no significant effect on water quality and pond productivity of water. As compared to control, pressmud incorpation supported higher or comparable growth in L. rohita with 20 % (D3) and 25 % (D4), in C. mrigala with 20-30% (D3-D5) and in C. carpio at 30% (D5) rice bran replacement level; however, growth of C. catla declined significantly with pressmud based diets. Pressmud diets also improved well being and health condition of fish, as reflected by improved condition factor values. Although, total fish biomass production declined with increase in pressmud incorporation level (15-30% rice bran replacement) and it was maximum with control diet but apparent FCR was better with pressmud incorporated diets D2 (1.63) and D3(1.62) as compared to control D1(1.74). Since, differential and positive growth response of different species of carps to pressmud incorporation has been observed, hence fish biomass production and profitability can be enhanced through rearing selected species with pressmud based diets