Potential of ricebran, corn and sorghum as supplements for scavenging meat ducks
1990
Naing, Tint
Primary aim of the study was to investigate the possibility of using corn or sorghum as substitutes for ricebran, the current supplementary feed used in the Northeast of Thailand in scavenging Muscovy duck production systems. Subsidiary aims were to compare the growth performance of Muscovy ducks and Pekin ducks using these supplementary feeds in the same scavenging system and to study the effects of duck wastes on fish growth. Two inter-related experiments were carried out simultaneously. In the first experiment, ducks were freely allowed to scavenge during daytime and fed ricebran, corn and sorghum in the evening for two months. Duck growth and feed consumption were recorded. Waste collected at night from the different feed supplement and species group were used as input to fish tanks in the second experiment, the design of which also included three duck stocking rates; 30, 40 and 50 ducks/200 square m fish pond. Although mean initial body weight of Muscovy duck (699 gm) was lower than that of Pekin duck (802 gm), no significant difference between the mean final body weight of Muscovy duck and Pekin duck (1655 and 1590 gm) was recorded. Daily feed input (127 gm/duck/day) and feed conversion ratio(4.8) of Muscovy were lower than that of Pekin duck (173 gm/duck/day and 9.3 respectively). Through scavenging of Muscovy duck was also observed. Highest mean daily weight gain of duck (21.3 gm/duck/day) was observed in ricebran fed ducks followed by that of corn (14.3 gm/duck/day) and that of sorghum (11.3 gm/duck/day). Fish growth did not differ significantly with different duck waste. For Muscovy duck/fish production in Northeast Thailand, strategic feeding based on the availability of natural feed and marketing season is discussed.
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