Chu, C.L.
(Department of Animal Science, National Taiwan University)
,
Wei, H.W.
(Department of Animal Science, National Taiwan University)
,
Chen, B.J.
(Department of Animal Science, National Taiwan University)
,
Shen, T.F.
(Department of Animal Science, National Taiwan University)
Experiments were conducted to determine potassium (K) requirement of mule ducklings. One-day-old ducklings with equal number of both sexes were fed diets containing graded levels of K for three weeks. In experiment 1, corn-soybean meal diet (CP 18.7%, ME 2,890 kcal/kg, K 0.80%) was used. The additio...
Experiments were conducted to determine potassium (K) requirement of mule ducklings. One-day-old ducklings with equal number of both sexes were fed diets containing graded levels of K for three weeks. In experiment 1, corn-soybean meal diet (CP 18.7%, ME 2,890 kcal/kg, K 0.80%) was used. The addition of K (0.00, 0.10, 0.20, 0.30, 0.40%) to the diet by potassium carbonate resulted in a decrease in weight gain and feed efficiency with the group fed on basal diet having the best performance. This means that the existing K in the basal diet is adequate for the growth of ducklings. In experiment 2, low K corn-isolated soy protein diet (K, 0.19%) was used. The supplementation of K (0.00, 0.16, 0.32, 0.48, 0.64%) resulted in an increase in weight gain and feed efficiency with the control group having the lowest performance. The minimum K requirement was found to be 0.49% for both maximum growth and best feed efficiency as determined by using bent-stick model.
Experiments were conducted to determine potassium (K) requirement of mule ducklings. One-day-old ducklings with equal number of both sexes were fed diets containing graded levels of K for three weeks. In experiment 1, corn-soybean meal diet (CP 18.7%, ME 2,890 kcal/kg, K 0.80%) was used. The addition of K (0.00, 0.10, 0.20, 0.30, 0.40%) to the diet by potassium carbonate resulted in a decrease in weight gain and feed efficiency with the group fed on basal diet having the best performance. This means that the existing K in the basal diet is adequate for the growth of ducklings. In experiment 2, low K corn-isolated soy protein diet (K, 0.19%) was used. The supplementation of K (0.00, 0.16, 0.32, 0.48, 0.64%) resulted in an increase in weight gain and feed efficiency with the control group having the lowest performance. The minimum K requirement was found to be 0.49% for both maximum growth and best feed efficiency as determined by using bent-stick model.
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문제 정의
In order to in^)rove the production efficiency, it is essential to establish the nutrient requirements for mule ducks. Consequently the experiments were initiated to determine the optimal potassium requirement for mule ducklings.
대상 데이터
Day-old mule ducklings obtained from a commercial hatchery were used in the experiments. The ducklings were randomly distributed into their respective pens of 10 birds in each pen with the same number of both sexes.
데이터처리
Potassium levels in the diets and in plasma were measured by using atomic absorption spectrophotometer (Perkin Elmer 3100). The data obtained on growth performance of ducklings were subjected to statistical analysis for variance among treatments and treatment means were compared according to Duncan's new multiple range test (Steel and Tome, 1980). The minimum potassium requirement for optimal growth and feed efficiency was determined by regression analysis of weight gain or feed efficiency against potassium level of the diets.
성능/효과
The effect of the supplementation of potassium to a low potassium com-isolated soybean protein diet on the growth performance of ducklings is shown in table 3. From the data shown, it could be seen that the growth rate of ducklings was significantly increased (p V 0.05) with the increases in the dietary potassium levels from 0.19% to 0.51%. The addition of potassium over 0.
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