以4週齡白羅曼鵝144隻逢機分為4處理組,每組4重複並分二期,進行馬鈴薯與甘藷補充飼糧試驗。試驗前期:於鵝隻4-8週齡進行。4處理組包括:正對照組,以一般生長鵝料任食;負對照給飼試驗飼糧,每日限飼170 g/隻;馬鈴薯或甘藷補充組,如負對照組限飼170 g/日/隻,再分別額外補充馬鈴薯或甘藷任食。試驗後期:8-13週齡,各組均給飼一般生長鵝料(同試驗前期對照組)任食。結果顯示,試驗前期:額外補充甘藷組的總飼料攝食量為351.0±27.5 g/日/隻(mean±SD)與正對照組相近,且顯著高於負對照組與補充馬鈴薯組(P<0.05),表示甘藷的適口性優於馬鈴薯。試驗後期:任食期間各組的飼料消耗量以負對照組最高為387.1±29.6g/日/隻,補充馬鈴薯組次之為379.1±25.5/隻,此兩組的體增重顯著高於其它兩組(P<0.05),顯示試驗後期的肉鵝有代償性生長的現象。就試驗全期而言,負對照組的飼料消耗量(290.6±16.5 g/日/隻)顯著低於其它3組(P<0.05),表示試驗前期給予限飼可降低飼料總攝食量。體增重則以正對照組最高為3.44±0.23 kg/隻,顯著高於負對照組的3.06±0.04 kg/隻(P<0.05),顯示雖然適當的限飼條件須再探討。額外補充馬鈴薯與甘藷組的體增重,分別為3.23±0.16與3.29±0.16 kg/隻,與正對照組間無顯著差異。綜合以上顯示,限飼再額外補充馬鈴薯或甘藷的給飼方法,對肉鵝而言,似乎為一可行的方式。
A total of 144 geese at 4 weeks of age were randomly allocated into 4 groups to evaluate the method of supplying potato and sweet potato on growing geese. For 1^(st) period, between 4 and 8 weeks of age, treatments were positive control group, giving growth diet ad libitum; negative control group giving experimental diet 170 g/day/goose restriction; two supplying groups were 170 g/day/goose restriction same with negative control group and supplying potato and sweet potato ad libitum at the same time, respectively. For 2^(nd) period, all groups were giving same growth diet ad libitum between 8 and 13 weeks of age. The results of 1^(st) period showed that the feed consumption of supplying sweet potato group was 351.0 ± 27.5 g/day/ goose (mean ± SD) which was closed to positive control group and significantly (P < 0.05) higher than those of negative control and potato supplying groups. It means that the palatability of sweet potato was better than potato for geese. At 2^(nd) period, the highest feed consumption was in negative group 387.1 ± 29.6 g/day/goose and the supplying potato group was the next. And the body weight gain (BWG) of these two groups were significantly higher than those in the other two groups (P < 0.05). It means that the compensatory growth appeared at 2^(nd) period. For whole period, the feed consumption of negative control group 290.6 ± 16.5 g/day/goose was significantly lower than those of the other 3 groups (P < 0.05). But their BWG 3.06 ± 0.16 kg/goose was significantly lower than positive control group 3.44 ± 0.23 kg/goose (P < 0.05). It means that the restriction method can reduce total feed consumption, but the suitable restriction conditions need further study. However, this supplying method may be useful for feeding domestic geese.