Effects of CPM model software on diet energy and nitrogen diagnosis, and lactating performance of dairy cows

2018 ◽  
Author(s):  
Y Chen ◽  
Y. L. Qu ◽  
J. Bao ◽  
J. C. Liu ◽  
J. Zhen
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Control Diet ◽  
Dairy Farm ◽  
Test Diet ◽  
Lactation Stage ◽  
Significant Difference ◽  
Similar Body ◽  
Daily Milk Yield ◽  
Daily Milk

ne hundred twelve China Holstein cows with similar body weight and lactation stage were selected. The average daily milk yield of one half was 20.34±1.61kg and the other was 25.41±2.97kg. In each herd, the cows were randomly assigned to two groups. The control diets (I and II) were the original dairy farm diets, and the test diets (I and II) were the corresponding control diets adjusted by CPM-Dairy (Cornell-Penn-Miner Dairy System). The diagnosis for the two original diets showed the ME and MP balance were greater than the cow requirement. The rumen peptide balance also showed the same tendency. Both test diets had lower CP (%/DM) than the corresponding Control diet by 1.60% and 2.5%, respectively. However, both the RUPs (%/CP) were increased a little in the two test diets. The MP allowed daily milk yield of Control diet I was greater than the actual daily milk yield and ME allowed daily milk yield (P Lass Than 0.05), but they didn’t present significant difference in Test diet I (P > 0.05).

scholarly journals Is rumenocentesis a safe technique to collect rumen fluid in dairy cows?

2018 ◽  
Vol 69 (3) ◽  
pp. 1135 ◽  
Author(s):  
N. PANOUSIS ◽  
G. KITKAS ◽  
G. E. VALERGAKIS
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Rumen Fluid ◽  
Small Diameter ◽  
Dairy Farm ◽  
Holstein Cows ◽  
Short Term ◽  
Safe Technique ◽  
Daily Milk Yield ◽  
Daily Milk

Subacute ruminal acidosis is a major issue in dairy cattle and a definite diagnosis is only established by measuring the rumen fluid pH, most credibly collected by rumenocentesis. However, due to its invasive nature, there is still some debate whether it is a safe method or poses risks for cows’ health and welfare. The aim of the study was to retrospectively evaluate the safety of rumenocentesis as a technique to obtain rumen fluid in dairy cows. Results were derived from 2 studies. In study 1, rumenocentesis was performed in 153 Holstein cows from 12 herds, once, between 10 and 90 days in milk (DIM). In study 2, 83 Holstein cows from a dairy farm were repeatedly subjected to rumenocentesisat 30, 90 and 150 DIM. From the 83 cows that were initially enrolled, 8 were culled before the end of the study for reasons irrelative to rumenocentesis; therefore, 236 rumenocenteses were actually performed in study 2 (3 times in 75 cows, twice in 3 cows and once in 5 cows). All cows were monitored for 10 days after rumenocentesis for presence of complications. In addition, daily milk yield was automatically recorded for each cow in study 2 to detect any possiblepost-rumenocentesis short-term reduction of milk yield. Minor only complications were recorded in 7 cases: in 4/153 (2.61%) and 3/236 (1.27%) rumenocenteses in studies 1 and 2, respectively. Small diameter abscesses in 6 cows (3 in study 1 and 3 in study 2) and a larger one in 1 cow in study 1 were observed. The 3 small abscesses in study 2 were all recorded after the 1st rumenocentesis, at DIM 30. All 7 cases were resolved spontaneously within two weeks. Moreover, short-term daily milk yield of study 2 cows was not affected by rumenocentesis. The conclusion is that rumenocentesis is a safe technique to collect small volume of rumen fluid for SARA diagnosis, which does not compromise cows’ health and welfare when appropriately performed.

scholarly journals Influence of microclimatic conditions on the daily production of dairy cows

2013 ◽  
Vol 29 (1) ◽  
pp. 45-51 ◽  
Author(s):  
D. Kucevic ◽  
M. Plavsic ◽  
S. Trivunovic ◽  
M. Radinovic ◽  
V. Bogdanovic
Keyword(s):  
Relative Humidity ◽  
Ambient Temperature ◽  
Dairy Cows ◽  
Milk Yield ◽  
Dairy Farm ◽  
Comfort Level ◽  
Daily Production ◽  
Microclimatic Conditions ◽  
Daily Milk Yield ◽  
Daily Milk

The aim of this paper was to determine the microclimatic conditions (ambient temperature and relative humidity) in dairy farm, as well as to evaluate the effect and significance of temperature - humidity index (THI) values on the daily milk yield. The observation of microclimatic parameters was conducted in the period from 9.03.2012 to 6.05.2012. The study included 136 Holstein Friesian cows. The estimation of the effect of THI on daily production of dairy cows was defined by applying fixed-effect statistical model. Average ambient temperature during measuring months amounted to 15.6?C (ranging from 7.2? C to 24.6?C), while the average value of relative humidity was 56.33% (ranging from 40.30% to 81.80%). During the study, the mean value of THI was 58.93 (ranging from 47.08 to 70.13) and didn?t exceed the critical comfort level of 72. All tested fixed-factors were statistically affected the daily milk yield (p <0.01). For each unit of increase in the value of the THI, the amount of milk decreased by 0.05344 kg. This confirmed the importance of regular recording of THI values and microclimatic conditions as a unique indicator of thermal stress in dairy farm.

scholarly journals Effects of herd, season and days in milk on milk urea nitrogen of crossbred dairy cows in Sylhet

2015 ◽  
Vol 2 (2) ◽  
pp. 287-292
Author(s):  
Nusrat Zahan Shoshe ◽  
Md Abdul Baset ◽  
Md Tariqul Islam ◽  
Shiekh MA Matin ◽  
Md Abdullah Al Mahmud
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Milk Fat ◽  
Wet Season ◽  
Urea Nitrogen ◽  
Lactation Stage ◽  
Milk Urea ◽  
Daily Milk Yield ◽  
Daily Milk ◽  
Milk Urea Nitrogen

The study included 724 crossbred cows (Local × Holstein Friesian) from 9 dairy farms of Sylhet district from July 2013 to June 2014 to determine the effect of herd, season, and days in milk in milk urea nitrogen and the effect of milk production and composition on milk urea nitrogen. According to the season, milk samples were divided into two groups: wet season (June - October) and dry season (November - February). Days in milk (DIM) were grouped into two lactation stages: Lactation 1 (?100 days in milk) and Lactation 2 (?100 days in milk). Milk urea nitrogen was grouped into five categories by increments of 5 mg/dl, started with those less than 10 mg/dl and finishing with concentration greater than 25 mg/dl. The daily milk yield was 6.78 kg ranged from 2.00 to 18.00 kg. The mean of milk urea nitrogen (MUN) concentration was 14.58 mg/dl. Mean values for milk fat and protein contents were 3.74 % and 3.72 %. Among the 9 herds, the highest content of milk urea (MU) was 16.37 mg/dl which was found in herd 2 and the second highest estimation of MU content were in herd 1, 3, 6 and 9 (15.58, 15.51, 15.12 and 14.45 mg/dl, respectively). In the district of Sylhet, the lowest MU content was estimated in herd 4, 5, 7 and 8 (13.59, 13.48, 13.16 and 13.60 mg/dl, respectively). Difference of MUN concentration was not significant between the dry and wet season. The MUN concentrations were 14.82 mg/dl and 14.90 mg/dl in dry and wet season respectively. The concentration of MUN in Lactation 1 was 13.61 mg/dl and in Lactation 2 was 16.26 mg/dl. Milk fat (%) were 3.56, 3.77, 3.64, 4.15 and 3.66 when MUN concentration were ?10.00, 10.01- 15.00, 15.01-20.00, 20.01-25.00 and ?24.01 mg/dl respectively. Daily milk yield did not increase with the increase of MUN concentration. Milk yield were 6.37, 7.21, 6.23, 7.31 and 7.00 Kg/d while MUN concentration were ?10.00, 10.01-15.00, 15.01-20.00, 20.01-25.00 and ?25.01 mg/dl. It may be concluded that herd category and lactation stage influence the milk urea nitrogen concentration of crossbred dairy cows in the Sylhet district.Res. Agric., Livest. Fish.2(2): 287-292, August 2015

scholarly journals Side preference of dairy cows in the milking parlour and its impact on daily milk yield

2021 ◽  
pp. 9-9
Author(s):  
Vendula Rencinova ◽  
Eva Voslarova ◽  
Vladimir Vecerek
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Dairy Herd ◽  
Significant Percentage ◽  
Significant Difference ◽  
Side Preference ◽  
Daily Milk Yield ◽  
Daily Milk

Monitoring of the side preference of dairy cows in the milking parlour was performed in a group of 40 dairy cows (Czech spotted cattle). Twenty milking sessions were evaluated for each cow, and the composition of the monitored group of cows was kept constant. A significant side preference was found in 26 (65%) cows. The results show that in the dairy herd, a significant percentage of cows prefer one side of the milking parlour. Furthermore, in dairy cows with a significant side preference, their milk yield on the preferred and non-preferred side of milking parlour was compared and a statistically significant difference was found. When the dairy cows were milked on their preferred side of the milking parlour, higher milk yield was achieved (12.21 vs. 10.38 kg).

Effect of value addition to rice straw on the nutritional improvement and milk productivity of dairy cattle

2020 ◽  
Vol 49 (1) ◽  
pp. 55-62
Author(s):  
MM Islam ◽  
A Akter ◽  
M Salauddin ◽  
MN Sultana ◽  
MM Uddin
Keyword(s):  
Rice Straw ◽  
Milk Yield ◽  
Control Group ◽  
Value Addition ◽  
Milk Productivity ◽  
Lactation Stage ◽  
Significant Difference ◽  
Daily Milk Yield ◽  
Physical And Chemical ◽  
Daily Milk

The objective of this study was to evaluate the physical and chemical value addition to rice straw on nutritional quality improvement of rice straw and its effect on milk productivity and composition. Twelve crossbred milking cows (Frisian Cross) of mid-lactation stage and second parity, having average initial body weight of 398.72 ± 42.22 kg and milk yield of 6.42± 0.78 kg were assigned to three treatment group (each group has 4 animals) and one control group. Four treatments were considered: T0 (control): loose rice straw + green grass + concentrate; T1: value addition to rice straw through chopping (physical) + green grass + concentrate; T2: value addition to rice straw through urea and molasses without chopped (Chemical) + green grass + concentrate; and T3: value addition to rice straw through urea molasses with chopping (Physical and chemical) + green grass + concentrate. The results revealed that T2 was significantly (p<0.05) higher than T0, T1 and T3 where total DM intake was 13.44± 0.26, 12.96±0.38, 12.47±0.16 and 12.06±0.31 for T2, T0, T3 and T1, respectively and the same was found for Crude protein. The daily milk yield was higher in T3 (8.12±0.30 kg/day) and followed by T0 (7.30±0.23 kg/day), T1 (6.61±1.35 kg/day) and T2 (6.78±0.09 kg/day) but daily milk yield gains were 0.31, 0.11, 1.44 and 1.46 kg in T0, T1, T2, and T3, respectively and differences were highly significant (p<0.01) among the groups. Milk composition of fat (4.40, 3.97, 4.90 and 4.10%), Protein (3.88, 3.69, 3.98 and 3.72%), SNF (8.42, 8.69, 8.49 and 8.13) and TS (12.57, 12.34, 12.96 and 11.90) in T0, T1, T2 and T3, respectively. There was significant difference (p<0.01) where the cows supplemented with UMS without and with chopping recorded SNF. Further study might be needed to estimate the economics of the value addition for enhancing the adoption of this technology at farm level through development of entrepreneurship. Bang. J. Anim. Sci. 2020. 49 (1): 55-62

Serum and Hair Trace Element and Mineral Levels in Dairy Cows in Relation to Daily Milk Yield

2021 ◽  
Author(s):  
Elena A. Sizova ◽  
Sergey A. Miroshnikov ◽  
Svetlana V. Notova ◽  
Olga V. Marshinskaya ◽  
Tatiana V. Kazakova ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Trace Element ◽  
Milk Yield ◽  
Daily Milk Yield ◽  
Mineral Levels ◽  
Daily Milk

scholarly journals Effect of heat stress on milk production and its composition of Holstein Friesian crossbred dairy cows

2016 ◽  
Vol 2 (2) ◽  
pp. 190-195 ◽  
Author(s):  
Mahmud Al Reyad ◽  
Md Abid Hasan Sarker ◽  
Md Elias Uddin ◽  
Raihan Habib ◽  
Md Harun Ur Rashid
Keyword(s):  
Heat Stress ◽  
Dairy Cows ◽  
Milk Yield ◽  
Management Practices ◽  
Management Strategies ◽  
Dairy Farm ◽  
Milk Composition ◽  
Mustard Oil ◽  
Holstein Friesian ◽  
Significant Difference

The aim of this research was to observe the effect of heat stress on milk yield and milk compositions of Holstein Friesian crossbred (HF) dairy cows. To fulfill the objectives, a total of 9 Holstein Friesian crossbred cows were selected for this study. Green grasses (German, Para) were supplied adlibitum and concentrate feeds (mixture of wheat bran, rice polish, mustard oil cake, di-calcium phosphate and salt) were supplied at the rate of 2.0 kg/day/cow. Management practices for all the cows were similar following the BAU Dairy farm practices. Data were collected on milk yield (l/h/d), relative humidity (%) and barn temperature (0C). The obtained temperature humidity index (THI) of July, August, September and October were 84.95, 81.99, 81.40 and 79.57, respectively. The highest THI was found in July which indicated higher heat stress during this month. A significant difference (p<0.05) in milk yield of cows was found among different months of July to October. The highest milk yield (6.10±0.50 l/h/d) was found in October among observed months. The compositions of milk such as total solids (TS), solids-not-fat (SNF), fat, protein, lactose, and ash also differed significantly (p<0.01). The highest values (%) of TS, SNF, fat, protein, lactose and ash content of milk were found in October as 12.63, 8.80, 3.83, 3.69, 4.39 and 0.72, respectively and lowest values (%) were in July as 12.20, 8.50, 3.71, 3.50, 4.30 and 0.69, respectively due to the high THI value. From these results, it is concluded that heat stress has strong effect on milk yield and milk composition of HF cows in Bangladesh. Management strategies are needed to minimize heat stress and attain optimal dairy animal performance.Asian J. Med. Biol. Res. June 2016, 2(2): 190-195

scholarly journals DAY-TO-DAY VARIATIONS IN FAT PERCENT OF COW'S MILK

1990 ◽  
Vol 70 (2) ◽  
pp. 731-734 ◽  
Author(s):  
A. S. ATWAL ◽  
J. D. ERFLE
Keyword(s):  
Dairy Cows ◽  
Key Words ◽  
Milk Yield ◽  
Milk Fat ◽  
Rumen Fluid ◽  
Supplemental Feeding ◽  
Fat Percentage ◽  
Milk Fat Depression ◽  
Daily Milk Yield ◽  
Daily Milk

Large day-to-day variations in milk fat, particularly for the morning milkings, were observed in 36 Holstein cows. Changes in percent fat were gradual and produced wavelike patterns in a number of instances. Supplemental feeding of long hay had no effect on acetate/propionate ratio in rumen fluid, daily milk yield or weighted milk fat percentage. Key words: Dairy cows, milk, fat depression, hay

scholarly journals Impact Of Genotypes And Parity On Reproductive And Productive Attributes In Dairy Cattle Of Natore District, Bangladesh

1970 ◽  
Vol 6 ◽  
pp. 91-96
Author(s):  
M Saiful Islam ◽  
Susanta Kumar Kundu
Keyword(s):  
Dairy Cattle ◽  
Dairy Cows ◽  
Milk Yield ◽  
Dairy Farms ◽  
Gestation Length ◽  
Overall Performance ◽  
Daily Milk Yield ◽  
Better Than ◽  
Daily Milk ◽  
Smallholder Dairy Farms

Impact of genotypes and parity on some vital reproductive and productive attributes in the local (L×L, n = 100) and four crossbred cows (L×F, L×SL, L×JR and L×S; n = 318) raised in randomly selected smallholder dairy farms scattered all over Natore District and adjacent areas have been assessed during a period from September 2007 to June 2010. With regard to reproductive attributes, significant differences existed among the cattle genotypes (P<0.05) except for gestation length (GL) and age at weaning (AW). The lowest age at puberty (AP) was found for L×F (21.42±0.37 months), while the highest for L×L (31.67±0.74 months). In terms of productivity, L×F cows produced the highest daily milk yield (DMY; 6.22±0.13 L), coupled with the highest total lactation yield (TLY; 2163.43±47.77 L), while L×L produced the lowest values (1.49±0.04 L and 416.40±12.3 L, respectively) for the traits. The effect of parity on both reproductive and productive attributes showed that the middle-aged dairy cows of the 3rd and 4th parities performed better than the younger (1st and 2nd parities) or the older (5th and beyond) ones. Considering the overall performance, the L×F cows could be ranked as the best genotype followed by their L×SL, L×JR, L×S and L×L counterparts in the study area. DOI: http://dx.doi.org/10.3329/jles.v6i0.9727 JLES 2011 6: 91-96

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