Biocontrol of weed in summer rice through grass carp (Ctenopharyngodon idella)
Journal Title: Scholars Journal of Agriculture and Veterinary Sciences - Year 2014, Vol 1, Issue 3
Abstract
Abstract: An experiment was conducted in Assam, India with three replications using 2500 fingerlings of grass carp per acre land for controlling weeds in summer rice. Another plot of one acre of summer rice without grass carp was treated as control for comparison. The experiment revealed that while average number of weed and weed weight per m2 in the rice monoculture (RMC) plot were 28.64 and 25.21 g, respectively; in the integrated rice fish culture (IRFC) plots number and weight of weeds were 3.4 and 2.99, respectively. Grass carp did not consume Echinochloa spp. and Alternanthera spp. Rice production was 3002 kg grains/acre against 2295 kg/acre, in IRFC and RNC plots, respectively. There was 30.81% increase of rice yield in IRFC, despite of fact that 11.35% the total rice field was used for trench as fish refuse, where rice was not planted. Total table fish production from IRFC was 2 276.74 kg/acre. The returns from IRFC and RMC were Rs. 20 0775.50 and Rs. 22 950.00 respectively. The BC ratio of IRFC and RMC were 3.05 and 1.48, respectively. The comparative analysis revealed an additional income Rs. 17 7825.50 per acre from IRFC system. Keywords: Grass carp, integrated rice-fish farming, weed, biocontrol, boro rice, rice equivalent.
Authors and Affiliations
Uttam Kumar Baruah, Hira Prabha Rabha, Minakshi Mazumdar
Keywords
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