scholarly journals Effects of prepartum dietary cation-anion difference on aspects of peripartum mineral and energy metabolism and performance of multiparous Holstein cows

2017 ◽  
Vol 100 (6) ◽  
pp. 4604-4622 ◽  
Author(s):  
B.M. Leno ◽  
C.M. Ryan ◽  
T. Stokol ◽  
D. Kirk ◽  
K.P. Zanzalari ◽  
...  
Keyword(s):  
Energy Metabolism ◽  
Holstein Cows ◽  
And Performance

Energy Metabolism in Lactating Holstein Cows

1995 ◽  
Vol 66 (4) ◽  
pp. 374-382
Author(s):  
Kiyoshi HAYASAKA ◽  
Naozumi TAKUSARI ◽  
Noriaki YAMAGISHI
Keyword(s):  
Energy Metabolism ◽  
Holstein Cows

scholarly journals Production, Forage Quality, and Performance of Holstein Cows under Intermittent Grazing on Tifton 85

2017 ◽  
Vol 9 (8) ◽  
pp. 11
Author(s):  
Valdevino Rodrigues Da Silva ◽  
Kátia Aparecida De Pinho Costa ◽  
Marco Antônio Pereira Da Silva ◽  
Edmar Soares Nicolau ◽  
Victor Costa Da Silva ◽  
...  
Keyword(s):  
Milk Production ◽  
Production Systems ◽  
Forage Quality ◽  
Live Weight ◽  
Dry Mass ◽  
Holstein Cows ◽  
Production Parameters ◽  
Randomized Design ◽  
And Performance

Tropical forage grasses compose the base diet of the Brazilian cattle herd due to their low production cost, high production potential, and good adaptation to various Brazilian ecosystems. In recent years, the search has intensified for alternatives that increase the yield in pasture milk production systems. Thus, the present study evaluated the production and quality of Tifton 85 grass in relation to the production parameters (e.g. greater leaf: stem ratio), and milk quality of Holstein cows in an intermittent grazing system during different seasons of the year. The experiment was conducted at the Córrego da Ponte Farm in Santa Helena de Goias, Goias, Brazil, from April 2014 to March 2015. The experiment used a completely randomized design with nine replicates and the four seasons (fall, winter, spring, and summer) as treatments. The Holstein cows had a live weight of 560±36.8 kg and averages four years of age. The grazing method used was a mob-stocking, with one day of grazing and 19 days of rest. The results showed that Tifton 85 was efficient regarding production parameters (total dry mass) and forage quality (IVDMD, NDF, ADF). The milk production was satisfactory during the fall, spring, and summer. The forage showed limited production during the winter, due the highest NDF, ADF levels and lower IVDMD (P < 0.05), which was directly reflected in the milk yield, fat, protein and lactose (P < 0.05). A reduction in the stocking rate or an increase in the number of paddocks is advisable during the winter to maximize milk production without compromising forage development. The correlation data showed the importance of consuming better-quality forage to increase milk production without compromising the levels of milk solids.

Physiological Considerations of Ultraendurance Performance

1991 ◽  
Vol 1 (1) ◽  
pp. 3-27 ◽  
Author(s):  
Richard B. Kreider
Keyword(s):  
Human Physiology ◽  
Energy Metabolism ◽  
Endurance Exercise ◽  
Human Performance ◽  
Physiological Responses ◽  
Physiological Effects ◽  
Research Groups ◽  
Exercise Science ◽  
Nutritional Factors ◽  
And Performance

The physiological effects of endurance exercise have been a primary area of research in exercise science for many years. This research has led not only to a greater understanding of human physiology but also the limits of human performance. This is especially true regarding the effects of endurance exercise on energy metabolism and nutrition. However, as science has attempted to understand the physiological and nutritional demands of endurance exercise lasting 1 to 3 hours, an increasing number of athletes have begun participating in ultraendurance events lasting 4 to 24 hours. Consequently some research groups are now investigating the physiological responses to ultraendurance training and performance. This paper reviews the literature on ultraendurance performance and discusses nutritional factors that may affect bioenergetic, thermoregulatory, endocrinological, and hematological responses to ultraendurance performance.

scholarly journals The Association of Calcium Profiles at Calving with Health and Performance of Holstein Cows and Their Calves

2021 ◽  
Vol 3 (4) ◽  
pp. p1
Author(s):  
Constantin Gavan ◽  
Mihaela Riza
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Holstein Cows ◽  
Fetal Membranes ◽  
Health Implications ◽  
Lactating Dairy Cows ◽  
Holstein Friesian ◽  
And Performance ◽  
Significant Health ◽  
Friesian Cows

The aim of this study was to assess the association of hypocalcemia at calving with health and performance of Holstein cows and their calves. Data were collected January 1st 2017 to December 31st 2020. A total of 431 lactating Holstein Friesian cows (118 primiparous and 313 multiparous) from a research of hypocalcemia was 2 groups (hypo and non-hypo). The overall prevalence of hypocalcemia was 3.4% for first-lactation cows and 18% for multiparous cows. Lactating dairy cows with hypocalcemia had greater proportion of cows with Retained Fetal Membranes (RFM) metritis and culling within 60 days in milk (DIM), compared with non-hypocalcemia respectively. For the first 2 official milk tests milk yield and components (% fat, % protein on SCC) did not differ between hypo and non-hypo cows. The days in milk at first service, mastitis, dystocia and pregnancy at first service were not different between hypo and non-hypo groups. The proportion of stillbirth, survival at 60 days of age in calves did not differ between calves born from hypo or non-hypo cows. Calves born from Hypo cows had greater incidence of diarrhea (38.3%) than calves born (22.3%) from non-hypo cows. The results of this study show that hypocalcemia in calving has significant health implications for both dams and their calves.  

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