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

Using direct fed microbials and exog...

Da Silva, Dayane Nogueira Lobao.

FindBook

Google Book

Amazon

博客來

Using direct fed microbials and exogenous fibrolytic enzymes to enhance fiber digestibility of dairy cow diets.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Using direct fed microbials and exogenous fibrolytic enzymes to enhance fiber digestibility of dairy cow diets./
作者:	Da Silva, Dayane Nogueira Lobao.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2015,
面頁冊數:	154 p.
附註:	Source: Dissertation Abstracts International, Volume: 77-02(E), Section: B.
Contained By:	Dissertation Abstracts International77-02B(E).
標題:	Animal sciences. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3727867
ISBN:	9781339131221

Using direct fed microbials and exogenous fibrolytic enzymes to enhance fiber digestibility of dairy cow diets.
Da Silva, Dayane Nogueira Lobao.

Using direct fed microbials and exogenous fibrolytic enzymes to enhance fiber digestibility of dairy cow diets. - Ann Arbor : ProQuest Dissertations & Theses, 2015 - 154 p.

Source: Dissertation Abstracts International, Volume: 77-02(E), Section: B.

Thesis (Ph.D.)--University of Minnesota, 2015.

Exogenous fibrolytic enzyme and DFMs additives are emerging technologies that show promise in terms of increasing diet formulation flexibility. They may improve fiber digestibility making possible greater inclusions of forages in the ration without negatively impacting animal performance. The objectives of this dissertation were to investigate the effect of Bacillus pumilus 8G-134 (BP) supplementation on total tract nutrient digestibility and milk yield of postpartum dairy cows fed low (20%, LS) or high (27%, HS) starch diets. Moreover, to examine the effect of adding a fibrolytic enzyme preparation through a molasses-based liquid feed (MLF) to diets on digestibility, ruminal patterns and production performance of primiparous cows. We hypothesized that BP, a spore forming Gram-positive bacteria, would increase production of ruminal xylanase and increase fiber digestion, dry matter intake (DMI), and performance of cows fed LS and HS diets postpartum. In addition, fibrolytic enzymes would increase fiber digestibility, efficiency of nutrient use of pre- and postpartum diets and assure greater performance compared to control diets. Results indicated that BP supplementation during early lactation decreased body lipid mobilization; therefore further research is needed to investigate the use of BP as a feeding strategy during the early postpartum period. During the 112 d of BP supplementation, DMI and milk fat yield increased, and milk protein yield tended to increase for both LS and HS diets fed to primiparous dairy cows. Moreover, BP tended to improve 3.5% FCM yield by 4.3% and 8.9% for LS and HS, respectively. Results also indicated that BP supplementation to primiparous cows can increase fiber digestibility and milk yield resulting in potential increases in profitability. Biological cows' response when fed enzyme supplementation was small, although positive. Future research is required to elucidate how different doses and length of feeding enzymes may affect growth and performance of animals in first lactation.

ISBN: 9781339131221Subjects--Topical Terms:

3174829
Animal sciences.

Using direct fed microbials and exogenous fibrolytic enzymes to enhance fiber digestibility of dairy cow diets.
LDR:03029nmm a2200301 4500 001 2121134
005 20170724102950.5
008 180830s2015 ||||||||||||||||| ||eng d
020 $a 9781339131221
035 $a (MiAaPQ)AAI3727867
035 $a AAI3727867
040 $a MiAaPQ $c MiAaPQ
100 1 $a Da Silva, Dayane Nogueira Lobao. $3 3283128
245 1 0 $a Using direct fed microbials and exogenous fibrolytic enzymes to enhance fiber digestibility of dairy cow diets.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2015
300 $a 154 p.
500 $a Source: Dissertation Abstracts International, Volume: 77-02(E), Section: B.
500 $a Advisers: Noah B. Litherland; Marcia I. Endres.
502 $a Thesis (Ph.D.)--University of Minnesota, 2015.
520 $a Exogenous fibrolytic enzyme and DFMs additives are emerging technologies that show promise in terms of increasing diet formulation flexibility. They may improve fiber digestibility making possible greater inclusions of forages in the ration without negatively impacting animal performance. The objectives of this dissertation were to investigate the effect of Bacillus pumilus 8G-134 (BP) supplementation on total tract nutrient digestibility and milk yield of postpartum dairy cows fed low (20%, LS) or high (27%, HS) starch diets. Moreover, to examine the effect of adding a fibrolytic enzyme preparation through a molasses-based liquid feed (MLF) to diets on digestibility, ruminal patterns and production performance of primiparous cows. We hypothesized that BP, a spore forming Gram-positive bacteria, would increase production of ruminal xylanase and increase fiber digestion, dry matter intake (DMI), and performance of cows fed LS and HS diets postpartum. In addition, fibrolytic enzymes would increase fiber digestibility, efficiency of nutrient use of pre- and postpartum diets and assure greater performance compared to control diets. Results indicated that BP supplementation during early lactation decreased body lipid mobilization; therefore further research is needed to investigate the use of BP as a feeding strategy during the early postpartum period. During the 112 d of BP supplementation, DMI and milk fat yield increased, and milk protein yield tended to increase for both LS and HS diets fed to primiparous dairy cows. Moreover, BP tended to improve 3.5% FCM yield by 4.3% and 8.9% for LS and HS, respectively. Results also indicated that BP supplementation to primiparous cows can increase fiber digestibility and milk yield resulting in potential increases in profitability. Biological cows' response when fed enzyme supplementation was small, although positive. Future research is required to elucidate how different doses and length of feeding enzymes may affect growth and performance of animals in first lactation.
590 $a School code: 0130.
650 4 $a Animal sciences. $3 3174829
650 4 $a Veterinary science. $3 3172798
650 4 $a Microbiology. $3 536250
690 $a 0475
690 $a 0778
690 $a 0410
710 2 $a University of Minnesota. $b Animal Sciences. $3 2093074
773 0 $t Dissertation Abstracts International $g 77-02B(E).
790 $a 0130
791 $a Ph.D.
792 $a 2015
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3727867