scholarly journals Effects of Feed Composition and Stage of Lactation on the Short-term Feeding Behavior of Dairy Cows

1998 ◽  
Vol 81 (12) ◽  
pp. 3268-3277 ◽  
Author(s):  
N.C. Friggens ◽  
B.L. Nielsen ◽  
I. Kyriazakis ◽  
B.J. Tolkamp ◽  
G.C. Emmans
2000 ◽  
Vol 83 (9) ◽  
pp. 2057-2068 ◽  
Author(s):  
B.J. Tolkamp ◽  
D.P.N. Schweitzer ◽  
I. Kyriazakis

1998 ◽  
Vol 1998 ◽  
pp. 25-25
Author(s):  
B.L. Nielsen ◽  
N.C. Friggens ◽  
I. Kyriazakis ◽  
B.J. Tolkamp ◽  
G.C. Emmans

Short-term feeding behaviour (STFB) has been used to elucidate the physiological mechanisms which control eating. It has been proposed as a means by which to predict voluntary food intake, and could be used to quantify behavioural characteristics of the cow. The first step in assessing the usefulness of STFB for these purposes is to identify the major factors which influence STFB. The aim of the study reported here was to evaluate, in dairy cows, the differences in STFB resulting from two different foods, the effect of stage of lactation on STFB, and the effect on STFB of changing from one food to another.


1976 ◽  
Vol 16 (81) ◽  
pp. 445 ◽  
Author(s):  
H Jeffery ◽  
RF Buesnel ◽  
GH O'Neill

Milk production of grazing dairy cows receiving 3 kg per day of wheat, sorghum, maize, oats or barley was measured. In general, only small differences were observed in the yield and composition of milk produced from cows consuming the different grains. Two experiments were conducted to investigate the relationship between the milk response of grazing dairy cows to 3 kg supplement and their level of production, stage of lactation, and age. Similar mean responses to supplementation were found in both experiments but no consistent relationship between response and either level of production, stage of lactation or age was found. A further experiment examined the response of grazing dairy cows, grouped into four groups according to their level of production, to 3, 4.1/3 5.2/3, 7 or 8.5 kg supplement per day. These treatments had a non-significant effect on milk composition; as the rate of supplementation increased, the yield of milk and its constituents first increased then commenced to decrease. The response obtained from both low and high producing cows was similar. It was thus concluded that in the short-term neither the type of grain fed, the cow's age, level of production nor stage of lactation affected its response to supplementation. The dichotomy between this conclusion and the widespread view that high producers respond better to supplementation is discussed.


1998 ◽  
Vol 1998 ◽  
pp. 25-25
Author(s):  
B.L. Nielsen ◽  
N.C. Friggens ◽  
I. Kyriazakis ◽  
B.J. Tolkamp ◽  
G.C. Emmans

Short-term feeding behaviour (STFB) has been used to elucidate the physiological mechanisms which control eating. It has been proposed as a means by which to predict voluntary food intake, and could be used to quantify behavioural characteristics of the cow. The first step in assessing the usefulness of STFB for these purposes is to identify the major factors which influence STFB. The aim of the study reported here was to evaluate, in dairy cows, the differences in STFB resulting from two different foods, the effect of stage of lactation on STFB, and the effect on STFB of changing from one food to another.


2016 ◽  
Vol 94 (suppl_5) ◽  
pp. 294-295
Author(s):  
K. A. Juntwait ◽  
A. F. Brito ◽  
K. S. O'Connor ◽  
R. G. Smith ◽  
K. M. Aragona ◽  
...  

2017 ◽  
Vol 0 (0) ◽  
pp. 0
Author(s):  
W. P. Santos ◽  
C. L. S. Ávila ◽  
M. N. Pereira ◽  
R. F. Schwan ◽  
N. M. Lopes ◽  
...  

Animals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 722
Author(s):  
Jang-Hoon Jo ◽  
Jalil Ghassemi Nejad ◽  
Dong-Qiao Peng ◽  
Hye-Ran Kim ◽  
Sang-Ho Kim ◽  
...  

This study aims to characterize the influence of short-term heat stress (HS; 4 day) in early lactating Holstein dairy cows, in terms of triggering blood metabolomics and parameters, milk yield and composition, and milk microRNA expression. Eight cows (milk yield = 30 ± 1.5 kg/day, parity = 1.09 ± 0.05) were homogeneously housed in environmentally controlled chambers, assigned into two groups with respect to the temperature humidity index (THI) at two distinct levels: approximately ~71 (low-temperature, low-humidity; LTLH) and ~86 (high-temperature, high-humidity; HTHH). Average feed intake (FI) dropped about 10 kg in the HTHH group, compared with the LTLH group (p = 0.001), whereas water intake was only numerically higher (p = 0.183) in the HTHH group than in the LTLH group. Physiological parameters, including rectal temperature (p = 0.001) and heart rate (p = 0.038), were significantly higher in the HTHH group than in the LTLH group. Plasma cortisol and haptoglobin were higher (p < 0.05) in the HTHH group, compared to the LTLH group. Milk yield, milk fat yield, 3.5% fat-corrected milk (FCM), and energy-corrected milk (ECM) were lower (p < 0.05) in the HTHH group than in the LTLH group. Higher relative expression of milk miRNA-216 was observed in the HTHH group (p < 0.05). Valine, isoleucine, methionine, phenylalanine, tyrosine, tryptophan, lactic acid, 3-phenylpropionic acid, 1,5-anhydro-D-sorbitol, myo-inositol, and urea were decreased (p < 0.05). These results suggest that early lactating cows are more vulnerable to short-term (4 day) high THI levels—that is, HTHH conditions—compared with LTLH, considering the enormous negative effects observed in measured blood metabolomics and parameters, milk yield and compositions, and milk miRNA-216 expression.


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