東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Effects of weaning transition and io...

Klotz, James Levi.

FindBook

Google Book

Amazon

博客來

Effects of weaning transition and ionophore on metabolic profile and portal and hepatic nutrient flux during pre- and post-weaning growth in dairy calves.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Effects of weaning transition and ionophore on metabolic profile and portal and hepatic nutrient flux during pre- and post-weaning growth in dairy calves./
作者:	Klotz, James Levi.
面頁冊數:	192 p.
附註:	Source: Dissertation Abstracts International, Volume: 65-04, Section: B, page: 1606.
Contained By:	Dissertation Abstracts International65-04B.
標題:	Agriculture, Animal Culture and Nutrition. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3130164
ISBN:	0496774174

Effects of weaning transition and ionophore on metabolic profile and portal and hepatic nutrient flux during pre- and post-weaning growth in dairy calves.
Klotz, James Levi.

Effects of weaning transition and ionophore on metabolic profile and portal and hepatic nutrient flux during pre- and post-weaning growth in dairy calves. - 192 p.

Source: Dissertation Abstracts International, Volume: 65-04, Section: B, page: 1606.

Thesis (Ph.D.)--The University of Tennessee, 2004.

Dairy calf weaning is associated with increases in ketone levels that exceed measured rates of utilization in adults and present a potential energy loss that may be mitigated by ionophores. Therefore, effects of weaning and ionophore supplementation on nutrient metabolism and growth in dairy calves pre- and post-weaning were examined in two experiments. The first experiment consisted of 24 Jersey bull calves blocked in groups of two according to birth date and weight and randomly assigned to receive either a commercial pelleted starter (CON), or the same diet containing lasalocid ( TRT; 83 mg/kg DM) to examine effects of weaning transition on weight (BW), gain (ADG), and blood concentrations of glucose, acetoacetate (ACAC), beta-hydroxybutyrate (BHBA), non-esterified fatty acids (NEFA), volatile fatty acids ( VFA), lactate, pyruvate, insulin, and glucagon over 16 wk. The second experiment assessed the effects of weaning and lasalocid supplemented starter (listed above) on BW, ADG, net portal-drained viscera, hepatic, and total splanchnic fluxes of the same metabolites listed above for Experiment 1, but were measured on d 35, 56, 84, and 112 in nineteen Jersey bull calves that were equipped with catheters in portal, hepatic, and mesenteric veins and artery at wk 3--4. In Experiments 1 and 2 all calves were fed milk replacer from d 3--34. On d 35, calves began receiving either CON or TRT calf starter ad libitum plus their milk replacer ration until weaning on d 49. From d 49-112 calves received only CON or TRT ad libitum. Post-weaning intake, ADG, and feed:gain did not differ between CON and TRT in either Experiment 1 and 2. Total VFA and ketones significantly increased and NEFA and glucose significantly decreased following introduction of solid feed in both experiments. Both experiments demonstrated significant effects of ionophore supplementation on ACAC, BHBA, and VFA during the early post-weaning period. In both experiments significant changes in metabolic profile of transition calves were demonstrated peri-weaning and ionophore appears to moderate alimentary output at a post-weaning period where ketone concentrations have potential to exceed whole animal capacity for utilization.

ISBN: 0496774174Subjects--Topical Terms:

1017857
Agriculture, Animal Culture and Nutrition.

Effects of weaning transition and ionophore on metabolic profile and portal and hepatic nutrient flux during pre- and post-weaning growth in dairy calves.
LDR:03206nmm 2200277 4500 001 1845654
005 20051101072042.5
008 130614s2004 eng d
020 $a 0496774174
035 $a (UnM)AAI3130164
035 $a AAI3130164
040 $a UnM $c UnM
100 1 $a Klotz, James Levi. $3 1933805
245 1 0 $a Effects of weaning transition and ionophore on metabolic profile and portal and hepatic nutrient flux during pre- and post-weaning growth in dairy calves.
300 $a 192 p.
500 $a Source: Dissertation Abstracts International, Volume: 65-04, Section: B, page: 1606.
500 $a Major Professor: Richard N. Heitmann.
502 $a Thesis (Ph.D.)--The University of Tennessee, 2004.
520 $a Dairy calf weaning is associated with increases in ketone levels that exceed measured rates of utilization in adults and present a potential energy loss that may be mitigated by ionophores. Therefore, effects of weaning and ionophore supplementation on nutrient metabolism and growth in dairy calves pre- and post-weaning were examined in two experiments. The first experiment consisted of 24 Jersey bull calves blocked in groups of two according to birth date and weight and randomly assigned to receive either a commercial pelleted starter (CON), or the same diet containing lasalocid ( TRT; 83 mg/kg DM) to examine effects of weaning transition on weight (BW), gain (ADG), and blood concentrations of glucose, acetoacetate (ACAC), beta-hydroxybutyrate (BHBA), non-esterified fatty acids (NEFA), volatile fatty acids ( VFA), lactate, pyruvate, insulin, and glucagon over 16 wk. The second experiment assessed the effects of weaning and lasalocid supplemented starter (listed above) on BW, ADG, net portal-drained viscera, hepatic, and total splanchnic fluxes of the same metabolites listed above for Experiment 1, but were measured on d 35, 56, 84, and 112 in nineteen Jersey bull calves that were equipped with catheters in portal, hepatic, and mesenteric veins and artery at wk 3--4. In Experiments 1 and 2 all calves were fed milk replacer from d 3--34. On d 35, calves began receiving either CON or TRT calf starter ad libitum plus their milk replacer ration until weaning on d 49. From d 49-112 calves received only CON or TRT ad libitum. Post-weaning intake, ADG, and feed:gain did not differ between CON and TRT in either Experiment 1 and 2. Total VFA and ketones significantly increased and NEFA and glucose significantly decreased following introduction of solid feed in both experiments. Both experiments demonstrated significant effects of ionophore supplementation on ACAC, BHBA, and VFA during the early post-weaning period. In both experiments significant changes in metabolic profile of transition calves were demonstrated peri-weaning and ionophore appears to moderate alimentary output at a post-weaning period where ketone concentrations have potential to exceed whole animal capacity for utilization.
590 $a School code: 0226.
650 4 $a Agriculture, Animal Culture and Nutrition. $3 1017857
650 4 $a Biology, Veterinary Science. $3 1021733
690 $a 0475
690 $a 0778
710 2 0 $a The University of Tennessee. $3 1022026
773 0 $t Dissertation Abstracts International $g 65-04B.
790 1 0 $a Heitmann, Richard N., $e advisor
790 $a 0226
791 $a Ph.D.
792 $a 2004
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3130164