This study took chicken bone meal as a research object and aimed to use direct method and difference method to evaluate nutritional value of chicken bone meal. A completely random design was used in this experiment and 42 healthy adult Wulong male geese or Qingnonghui male geese aged 260 days were selected. The geese were divided into 1 control group and 6 experimental groups with 6 replicates in each group. The control group adopted the direct method and the diet was no corn starch added. The 6 experimental groups adopted difference method and the diets were added 15%, 25%, 45%, 65%, 75% and 85% corn starch instead of chicken bone meal, respectively. The experiment lasted for 3 days and the geese were fed experimental diets. After emptying 24 h, every goose was consecutively force-fed a nitrogen-free diet (100 g per day) for 3 days. Total feces collection method was adopted in this experiment. The results showed as follows: 1) compared with the control group, true metabolizable energy (TME) and metabolic rates of crude protein (CP), ether extract (EE), parts of amine acid (AA) of Wulong geese and Qingnonghui geese in the 6 experimental groups were significantly higher (P<0.05 or P<0.01). The metabolic rates of crude fiber (CF), neutral detergent fiber (NDF), acid detergent fiber (ADF), calcium (Ca) and phosphorus (P) were not significantly different from the control group (P>0.05). 2) The results of difference method showed that TME and metabolic rates of CP, EE, parts of AA of the two breeds in 75% corn starch supplementation group were significantly higher than those in other experimental groups (P<0.05). The metabolic rates of conventional nutrients in 85% corn starch supplementation group were significantly lower than those in 75% corn starch supplementation group (P<0.05). The metabolic rates of CF, NDF, ADF, Ca and P were not significantly different between experimental groups (P>0.05). 3) TME and metabolic rates of CP, parts of AA of Qingnonghui geese fed chicken bone meal were significantly (P<0.05) or extremely significantly (P<0.01) higher than those of Wulong geese. The CF metabolic rate of Wulong geese was significantly higher than that of Qingnonghui geese (P<0.05). The study shows that difference method is superior to direct method and data accuracy and stability are better when adding 75% corn starch instead of chicken bone meal. There remains a discrepancy between goose breeds on the metabolic rates of conventional nutrients.
WANG Baowei
,
WANG Xiaoxiao
,
GE Wenhua
,
ZHANG Ming
,
YUE Bin
,
ZHOU Xiaoqiao
. True Metabolizable Energy and Conventional Nutrient Metabolic Rate of Chicken Bone Meal for Geese[J]. Chinese Journal of Animal Nutrition, 2012
, 24(6)
: 1052
-1061
.
DOI: 10.3969/j.issn.1006-267x.2012.06.009
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