PSV-27 Optimizing corn silage utilization in beef feedlot diets: Evaluating the impact of exogenous glucoamylase addition on performance and digestibility

饲养场 青贮饲料 动物科学 肉牛 农学 生物技术 化学 食品科学 生物
作者
J. P. Schoonmaker,Lester R Nolasco,T. Vincent,Rodrigo de Nazaré Santos Torres
出处
期刊:Journal of Animal Science [Oxford University Press]
卷期号:102 (Supplement_3): 739-740
标识
DOI:10.1093/jas/skae234.834
摘要

Abstract The addition of an exogenous glucoamylase enzyme preparation to feedlot diets that contain a high percentage of corn silage may improve digestibility and yield positive outcomes in growth and efficiency. However, it is unclear what concentration of corn silage in the diet would most benefit from exogenous glucoamylase. Crossbred steers [n = 180; body weight (BW) = 459 ± 11.8 kg] were divided into 30 pens (5 pens per treatment; 6 steers per pen) and assigned to one of six treatments arranged as a 3 x 2 factorial investigating 3 forage concentrations (15, 42, and 69% corn silage) and 2 exogenous glucoamylase additions (0 or 183 enzyme units/kg of dry matter per d). Steers were fed 42% corn silage, 30% corn, 23% dried distillers grains with solubles, and 5% supplement at feedlot entry and for 2 wk prior to initiation of the study. Steers on the 15% and 69% corn silage diets were transitioned to treatment diets by wk 3 of the study (d 15), with the first transition occurring on d 0. Diet transitions occurred once weekly. The animals were on feed for 105 ± 10.4 d and had ad libitum access to feed and water. Average daily gain (ADG), dry matter intake (DMI), and gain:feed were assessed both overall and for two distinct periods: d 0 to 50, and d 51 until slaughter. Data analysis was performed using the GLIMMIX procedure of SAS. From d 0 to 50, ADG, DMI, and gain:feed did not differ due to forage concentration or enzyme inclusion and there was no interaction (P ≥ 0.39). For d 51 to slaughter, enzyme inclusion interacted with forage concentration such that the enzyme improved ADG (P = 0.0003) and gain:feed (P = 0.01) for steers fed the 42% corn silage diet but did not effect ADG and gain:feed for steers fed the 15 or 69% corn silage diets. For d 51 to slaughter DMI was not affected by forage concentration, enzyme inclusion, or their interaction (P ≥ 0.21). When calculated for the entire study (d 0 to slaughter), increasing forage concentration decreased ADG and gain:feed (P ≤ 0.0006), but did not effect DMI (P = 0.22). Overall, enzyme addition did not impact ADG, DMI, or gain:feed and did not interact with forage concentration (P ≥ 0.50). Carcass characteristics were not affected by forage concentration, enzyme addition, or their interaction (P ≥ 0.19). Overall results suggest that an exogenous glucoamylase enzyme improves growth and efficiency of heavier feedlot cattle fed moderate amounts of forage later in the feeding period.

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
jane完成签到 ,获得积分10
刚刚
2秒前
瑾玉完成签到,获得积分10
2秒前
4秒前
Akim应助duckspy采纳,获得10
4秒前
那种完成签到,获得积分10
4秒前
liuyanq完成签到,获得积分20
4秒前
5秒前
普鲁卡因发布了新的文献求助10
6秒前
加油杨完成签到 ,获得积分10
7秒前
liuyanq发布了新的文献求助10
10秒前
随风完成签到,获得积分10
13秒前
量子星尘发布了新的文献求助10
15秒前
米九完成签到,获得积分10
17秒前
zhao完成签到,获得积分10
20秒前
普鲁卡因发布了新的文献求助10
20秒前
zj完成签到,获得积分10
26秒前
蓝橙完成签到,获得积分10
27秒前
31秒前
GD88完成签到,获得积分10
32秒前
糟糕的梨愁完成签到,获得积分10
33秒前
莫西莫西完成签到 ,获得积分10
34秒前
小趴蔡完成签到 ,获得积分10
36秒前
唐唐发布了新的文献求助10
36秒前
飘逸剑身完成签到,获得积分10
39秒前
airtermis完成签到 ,获得积分10
39秒前
gfasdjsjdsjd完成签到,获得积分10
40秒前
40秒前
杨宁完成签到 ,获得积分10
40秒前
MchemG应助transition采纳,获得20
41秒前
科研通AI2S应助科研通管家采纳,获得10
42秒前
lxy发布了新的文献求助10
44秒前
gfasdjsjdsjd发布了新的文献求助10
45秒前
JCao727完成签到,获得积分10
45秒前
45秒前
46秒前
OAHCIL完成签到 ,获得积分10
47秒前
lixueao发布了新的文献求助10
48秒前
无辜的行云完成签到 ,获得积分0
51秒前
FIN应助gfasdjsjdsjd采纳,获得20
53秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Handbook of Industrial Diamonds.Vol2 1100
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 4038128
求助须知:如何正确求助?哪些是违规求助? 3575831
关于积分的说明 11373827
捐赠科研通 3305610
什么是DOI,文献DOI怎么找? 1819255
邀请新用户注册赠送积分活动 892655
科研通“疑难数据库(出版商)”最低求助积分说明 815022