scholarly journals The effect of dystocia on the dry matter intake and behavior of Holstein cows

2009 ◽  
Vol 92 (10) ◽  
pp. 4937-4944 ◽  
Author(s):  
K.L. Proudfoot ◽  
J.M. Huzzey ◽  
M.A.G. von Keyserlingk
2015 ◽  
Vol 36 (6Supl2) ◽  
pp. 4565 ◽  
Author(s):  
Ériton Egidio Lisboa Valente ◽  
Mario Luiz Chizzotti ◽  
Cristiane Viol Ribeiro de Oliveira ◽  
Matheus Castilho Galvão ◽  
Silas Sebastião Domingues ◽  
...  

<p>Genetics differences between breeds may determine the tolerance to high temperature, effect dry matter intake and consequently cattle performance. The effect of temperature and humidity index (THI) on diurnal, nocturnal and daily intake, water intake, physiologic parameters and behavior of Nellore (<em>B. indicus</em>) and Angus (<em>B. taurus</em>) bulls were evaluated. Eight Angus and eight Nellore young bulls (337±7.4 kg and 16 months of age) were allocated in two climate-controlled rooms for 32 days. In the period 1, all bulls were housed in thermoneutral conditions (TN, THI = 72.6) for 10 days. In period 2 (10 days), four Angus and four Nellore bulls were subjected to low heat stress (LHS, THI = 76.4) in daytime, and four Angus and four Nellore bulls were subjected to high heat stress (HHS, THI = 81.5) in daytime. The diurnal and daily dry matter intake (DMI) of Nellore were not affected (P&gt;0.05) by heat stress. However, Angus bulls decreased diurnal DMI by 24% and daily DMI decreased (P&lt;0.05) by 15% on HHS. In TN Angus bulls had higher (P&lt;0.05) daily DMI (36.2 g/kg of BW) than Nellore (29.1 g/kg of BW), but in HHS they had similar (P&gt;0.05) daily DMI (31.6 and 30.2 g/kg of BW, respectively). We observed an increase (P&lt;0.05) in respiratory frequency, but water intake was not affected (P&gt;0.05) by heat stress. The heart rate decreased (P&lt;0.05) with heat stress. No differences were found (P&gt;0.05) in feeding behavior. Therefore, THI stress threshold should distinct for Angus and Nellore bulls. The use of feed intake information may improve the prediction of thermic discomfort on specific climate condition. </p>


2009 ◽  
Vol 92 (7) ◽  
pp. 3354-3363 ◽  
Author(s):  
J.H. Clark ◽  
R.A. Christensen ◽  
H.G. Bateman ◽  
K.R. Cummings

2009 ◽  
Vol 35 (2) ◽  
pp. 149-154 ◽  
Author(s):  
A. Plascencia ◽  
V. M. González-Vizcarra ◽  
M. A. López-Soto ◽  
D. May ◽  
L. C. Pujol ◽  
...  

1991 ◽  
Vol 74 (5) ◽  
pp. 1609-1622 ◽  
Author(s):  
J.E. Wohlt ◽  
S.L. Chmiel ◽  
P.K. Zajac ◽  
L. Backer ◽  
D.B. Blethen ◽  
...  

2017 ◽  
Vol 50 (1) ◽  
pp. 143-148
Author(s):  
Saulo Alberto do Carmo Araújo ◽  
Guilherme Pires Bicalho ◽  
Norberto da Silva Rocha ◽  
Cláudia Braga Pereira Bento ◽  
Marluci Olício Ortêncio

2015 ◽  
Vol 98 (11) ◽  
pp. 8195-8200 ◽  
Author(s):  
B.N. Shonka ◽  
S. Tao ◽  
G.E. Dahl ◽  
D.M. Spurlock

1989 ◽  
Vol 60 (5) ◽  
pp. 419-428
Author(s):  
Kiyoshi HAYASAKA ◽  
Torneyuki MIYAUCHI ◽  
Susumu MIYAMOTO ◽  
Teruo ARAI ◽  
Masahito TAKATORI ◽  
...  

1969 ◽  
Vol 84 (1-2) ◽  
pp. 17-28
Author(s):  
Teodoro M. Ruiz ◽  
Jaime Moyá ◽  
Luis Viera

Three stargrass silage (SGS)-based diets formulated to contain 20, 26 and 32% neutral detergent fiber (NDF) were compared as to their effect on dry matter intake (DMI) and milk production. Twelve lactating Holstein cows averaging 110 days in milk were arranged in four replications of a 3 x 3 Latin Square design. Treatments did not affect DMI or DMI as percentage of body weight (BW); mean values for these parameters were 15.4 kg/cow/day and 3.06%, respectively. However, cows consuming 32% NDF diet had a tendency toward lower (8.6%) intake of organic matter (OM) as percentage of BW than cows on the 20% NDF diet. Intake of NDF as a percentage of BW increased (P < 0.01) linearly (0.62 to 0.93%) as dietary NDF concentration increased. Milk production averaged 21.0 kg/cow/day and was not affected by dietary treatment. Reducing dietary NDF from 32 to 20% resulted in a reduction (P < 0.01) in milk fat from 3.09 to 2.66%.This reduction resulted in a 1.3 kg/cow/day increase (P < 0.05) in 3.25% fat-corrected milk (3.25% FCM) as the percentage of dietary NDF increased. Gross efficiency of energy (NEL) use for milk production and 3.25% FCM increased linearly with dietary NDF by 9.7 and 17.3%, respectively. Results point out that for mid-lactation cows at the observed level of production, diets lower than 32% NDF will not result in higher DMI and milk production, and will be less efficient in the use of energy for milk production.


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