scholarly journals Effect of the first and next calvings of cows and their milk production level on the relationship between dry period length and milk yield and its composition in the subsequent lactation

2013 ◽  
Vol 56 (1) ◽  
pp. 934-942
Author(s):  
A. Sawa ◽  
M. Bogucki ◽  
K. Siatka
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Period Length ◽  
Production Level ◽  
Dry Period ◽  
Milk Components ◽  
The Relationship ◽  
Positive Effect

Abstract. The effect cow age and milk production level was analized on the relationship between dry period length and milk yield and composition in the subsequent lactation. The GLM and CORR PEARSON procedures of the SAS package were used in the statistical calculations. It is shown that in terms of milk yield in the subsequent lactation, a dry period of 40–60 days was the most favourable. In particular in primiparous cows it was found that in terms of milk yield, shortening the dry period is less favourable than extending it beyond the 41- to 60-day standard. A dry period of 21–40 days can be offered to multiparous cows without significant milk losses in the subsequent lactation. Eliminating or shortening the dry period should exclude cows after first calving. It seems that a dry period of 21–40 days can also be offered to high-producing cows (≥ 8 000 kg milk) because their milk yield, in relation to cows dried for 41–60 days, was lower by 3.5 %. Shortening the dry period has a positive effect on the concentration of basic milk components such as fat and protein, causing them to increase. Dry period length had no effect on milk lactose content.

scholarly journals Influence of reproductive qualities on dairy productivity of cows of the Simmental breed

2021 ◽  
Vol 285 ◽  
pp. 04005
Author(s):  
Maria Grinchuk ◽  
Yulia Nesterova
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Mass Fraction ◽  
Milk Protein ◽  
Production Performance ◽  
Dry Period ◽  
Milk Productivity ◽  
Service Period ◽  
Positive Effect ◽  
Different Levels

The aim of work is to explore influence of first fruitful insemination, service period and dry period to dairy productivity of Simmental cows. The research is aimed at studying the milk production of Simmental cows with different levels of reproductive qualities. The result of the research, a relation was established between the age of the first fruitful insemination, the duration of the service period, the duration of the dry period and milk production performance. It has been established that the age of the first fruitful insemination at 18-24 months has the most beneficial effect on subsequent milk production. The service period of 90-120 days has a positive effect to an increase in milk yield per 305 days of lactation, the longer service period negatively affects to the mass fraction of fat. With an increase in the duration of the dry period, the mass fraction of fat increases, but milk yield decreases. The influence of reproductive qualities to the milk protein is negligible. It was revealed that the age of the first insemination at 18-24 months is the most profitable for production. According to the results of the research, it can be judged that reproductive qualities, in combination with other factors, affect the milk productivity of Simmental cows.

Hubungan lama masa kering terhadap produksi susu dan puncak laktasi pada sapi perah

2020 ◽  
Vol 8 (1) ◽  
pp. 30-37
Author(s):  
Yuli Arif Tribudi ◽  
Ali Mahmud ◽  
Rosyida Fajri Rinanti
Keyword(s):  
Regression Analysis ◽  
Dairy Cows ◽  
Key Words ◽  
Milk Production ◽  
Milk Yield ◽  
Regression Equation ◽  
Period Length ◽  
Dry Period ◽  
Optimal Length

Penelitian ini bertujuan untuk mengetahui hubungan lama masa kering dengan produksi susu dan puncak laktasi pada sapi FH. Materi yang digunakan adalah data sekunder dari pencatatan recording 189 ekor sapi FH pada PT. Greenfields Indonesia di Desa Babadan Kecamatan Ngajum Kabupaten Malang. Analisis pengaruh lama masa kering terhadap produksi susu dan puncak laktasi dilakukan dengan menggunakan analisis regresi linier. Hasil analisis regresi menunjukkan bahwa hubungan lama masa kering terhadap produksi susu berpengaruh signifikan (P<0,05) dengan persamaan regresi Y = 28,31 – 1,26 X sedangkan dengan puncak laktasi menunjukkan hubungan yang tidak berpengaruh (P>0,05). Lama masa kering menentukan produksi susu pada sapi perah dengan masa kering yang ideal 55- 60 hari dimana semakin lama masa kering maka produksi susu akan menurun. Kata kunci : masa kering, produksi susu, regresi, sapi FH ABSTRACT The objective of this study was to evaluate the effect of dry period length on milk production and peak milk yield of the Friesian Holstein (FH) dairy cows. Data on milk production from 189 FH cows raised at PT. Greenfields Indonesia were collected and subjected to linier regression analysis. The results showed that dry period length significantly (P<0.05) on affected milk production with regression equation of Y = 28.31 – 1.26 X, but had no significant effect (P.0.05) on peak milk yield. The optimal length of dry period was observed between 55 and 60 days. Milk production decreased with the increasing length of dry period above 55-60 days. Key words : dry period, milk yield, regression, FH cows

Effects of dry period length on milk production and composition in early lactating Holstein cows

2009 ◽  
Vol 2009 ◽  
pp. 131-131
Author(s):  
A Soleimani ◽  
A Heravi Moussavi ◽  
M Danesh Mesgaran ◽  
S Safa
Keyword(s):  
Retrospective Analysis ◽  
Milk Production ◽  
Milk Yield ◽  
Metabolic Disorders ◽  
Period Length ◽  
Holstein Cows ◽  
Dry Period ◽  
Nutritional Strategy

Recently, there has been an interest in shortening the non-income-producing dry period (DP). Retrospective analysis of farm data and planned experiments both indicate about a 5 to 6% loss in milk yield during the subsequent lactation when the DP is reduced by approximately 30 d (Rastani et al., 2005). Additional milk produced during the extra 30 d of lactation can compensate for some of the loss in the subsequent lactation. There are, however, some advantages to reducing the dry period length, including increased income from milk in the current lactation, simplified management of dry cows through movement toward a one-group nutritional strategy, decreased metabolic disorders, and reduced strain on dry cow facilities. The aim of this study was to determine the effects of dry period length on milk production and composition in early lactating Holstein cows.

Effects of dry period length on milk yield and content and metabolic status of high-producing dairy cows under heat stress

2021 ◽  
Vol 53 (2) ◽  
Author(s):  
A. Boustan ◽  
V. Vahedi ◽  
M. Abdi Farab ◽  
H. Karami ◽  
R. Seyedsharifi ◽  
...  
Keyword(s):  
Heat Stress ◽  
Dairy Cows ◽  
Milk Yield ◽  
Period Length ◽  
Metabolic Status ◽  
Dry Period

scholarly journals Characteristics of the productive-economic indicators of cows of Yaroslavl breed of different genotypes

2020 ◽  
pp. 43-52
Author(s):  
N. Kosyachenko ◽  
Marina Abramova ◽  
M. Lapina
Keyword(s):  
Protein Content ◽  
Milk Production ◽  
Milk Yield ◽  
Milk Fat ◽  
Live Weight ◽  
Practical Significance ◽  
Holstein Breed ◽  
Blood Fraction ◽  
The Impact ◽  
The Relationship

Abstract. Aim. The study of the influence of crossbriding on the growth and development of heifers and subsequent productive and reproductive qualities of cows on the first lactation. Methods. Using statistical methods, correlation analysis and ANOVA for evaluated genetic indicators of economic-valuable traits of dairy cattle. In particular was studied live weight of heifers from birth to 18 months, first insemination age and first fecundation age, live weight at fecundation, frequency of insemination, first calving age, days open, live weight at first lactation, milk yield for 305 days (kg), fat (%, kg) and protein (%, kg) in milk. Results. Relationship between productive indicators and the genotype of the animal is established. When assessing the strength of the influence of the factor «blood on the Holstein breed» it was found that the greatest impact can be traced at the age of 6 and 18 months, and is respectively 12.7 % and 17.1 %.The reproductive qualities of the first-calf cows decreased with the increase percent of blood in the Holstein breed. Evaluation of the impact of crossbreeding on milk production at first lactation has revealed significant strong influence on milk yield for 305 days of first lactation, and related signs the amount of milk fat and protein. According to qualitative indicators, the low influence of the Holstein blood fraction was found, while to a greater extent on the fat content than on the protein content in milk. Evaluation of phenotypic and genotypic correlations of milk yield and quality components of milk revealed average negative phenotypic and low negative genotypic correlation in all groups. The exception was in heifers of Yaroslavl breed with percent of Holstein blood less than 50 %, in which the relationship of yield x protein was positive. The relationship between milk yield and fat and protein content in milk has the opposite moderate character and strength. Practical significance. Studies was established that breeding of animals of Holstein and Yaroslavl breeds in one herd allows to receive an optimum ratio of milk production with optimal percentage fat and protein. For this herd among animals of the improved genotypes of the Yaroslavl breed, the use of genotypes with a percent of blood in the Holstein breed from 75.1 % to 87.6 % is optimal, which should be taken into account when selecting bulls to the breeding program.

Value for milk production of artificially dried forages as cobs and pellets

1972 ◽  
Vol 14 (1) ◽  
pp. 69-75 ◽  
Author(s):  
J. A. Milne ◽  
E. F. Thomson ◽  
R. C. Campling
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Live Weight ◽  
Fat Content ◽  
Significant Positive Effect ◽  
Significant Difference ◽  
Four Levels ◽  
Milk Solids ◽  
Positive Effect ◽  
Basal Ration

SUMMARYTwo experiments were conducted to compare the milk-producing value of dried forages in the form of cobs and pellets as replacements for a standard dairy concentrate. Four levels (0·33, 0·44, 0·55 and 0·66 kg/kg milk) of dried forage or standard dairy concentrate were offered in addition to a basal ration of 6 kg hay and 2 kg standard dairy concentrate. In both experiments the rate of eating by the cows of cobs was significantly slower (P<0·05) than that of pellets. No significant difference was found between the cobs and pellets in either experiment in their value for milk production. In Experiment 2 the standard dairy concentrate had a non-significantly higher (P>0·05) milk-producing value than the dried lucerne. Level of feeding had a significant positive effect on the milk yield (P< 0·001) of cows offered the dried grass and lucerne and on the milk solids- not-fat content (P<0·05) and live weight (P<0·01) of cows offered the dried grass, lucerne and standard dairy concentrate.

scholarly journals Effects of Dry Period Length on Milk Yield and Mammary Epithelial Cells

2004 ◽  
Vol 87 ◽  
pp. E66-E76 ◽  
Author(s):  
E.L. Annen ◽  
R.J. Collier ◽  
M.A. McGuire ◽  
J.L. Vicini
Keyword(s):  
Epithelial Cells ◽  
Milk Yield ◽  
Mammary Epithelial Cells ◽  
Mammary Epithelial ◽  
Period Length ◽  
Dry Period

138. Effect of Breed, Size of Cow, Yield of Milk and Stage of Lactation upon Efficiency of Milk Production

1936 ◽  
Vol 7 (3) ◽  
pp. 211-221 ◽  
Author(s):  
Joseph Edwards
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Live Weight ◽  
Gross Efficiency ◽  
Physiological Efficiency ◽  
Stage Of Lactation ◽  
Actual Yield ◽  
The Relationship

The records of 2400 cows on test at the London Dairy Show between the years 1922 and 1934 have been examined for the relationship between the gross physiological efficiency of milk production and the factors of breed, size of cow within a breed, actual yield of milk and stage of lactation. (“Gross Efficiency” is here the ratio of energy in the milk to the energy in the digestible nutrients consumed.)(1) It is shown that among the best representatives of the various dairy breeds there is little difference in gross efficiency of milk production. The lactation stimulus has been bred approximately in proportion to the size of the breed.(2) Cows, in spite of their greater weight, are more efficient than heifers, and animals milked thrice daily than those milked twice daily.(3) Within the breed there is a slight though definite tendency for gross efficiency to decrease with increase in live weight.(4) Greater than any of the foregoing differences in gross efficiency is that which exists within a breed due to differences in actual milk yield.(5) Stage of lactation has also much to do with gross efficiency. There is a steady decline in efficiency with advance in lactation from 38·75 to 29·25 per cent.

Influence of dry period length on reproductive performance and productivity of Lacaune dairy sheep under an intensive management system

2012 ◽  
Vol 79 (3) ◽  
pp. 352-360 ◽  
Author(s):  
Fernando Hernandez ◽  
Laura Elvira ◽  
Juan-Vicente Gonzalez-Martin ◽  
Susana Astiz
Keyword(s):  
Milk Yield ◽  
Global Analysis ◽  
Dairy Farm ◽  
Period Length ◽  
Intensive Management ◽  
Dairy Sheep ◽  
Dry Period ◽  
Key Factor ◽  
Daily Milk Yield ◽  
Daily Milk

Intensive management is almost the only way to ensure dairy farm profitability. The dry period length (DPL) is a key factor in the productivity and health of dairy cows, but whether the same is true of dairy sheep is unclear. This study investigated the effects of DPL on the performance of Lacaune sheep under intensive management. We recorded 8136 lactations from 4220 ewes on one farm for the period 2005–2010, and data from a total of 6762 complete lactations 1–4 were included in the study. The length of the dry period following the current lactation was studied. The larger the total milk yield (MY) and daily milk yield (DMY), the shorter was the DPL before the next lactation. DPL correlated with MY (r=−0·384), DMY (r=−0·277) and the lambing-to-conception interval (LC; r=0·201, P<0·0001) in the global analysis of all lactations (lactations 1–4). The influence of previous-DPL (P-DPL), or the length of the period prior to the start of the next lactation, was studied for 4318 lactations. P-DPL was classified into five intervals: very short (P-DPL-XS), 1–30 d; short (P-DPL-S), 31–60 d; medium (P-DPL-M), 61–90 d; long (P-DPL-L), 91–120 d; and very long (P-DPL-XL), >120 d. P-DPL positively correlated with lambing-to-next conception interval (LNC; r=0·095, P<0·0001) for lactations 1–4. LNC was significantly shorter for P-DPLs that were very short, short, or long (P-PDL-XS, 144·2±67·8 d; P-PDL-S, 149·1±57·2 d; P-PDL-L, 152·0±53·7 d) than for groups with very long or medium P-PDLs (P-DPL-XL, 161·5±62·9 d; P-DPL-M, 169·0±74·8 d; P<0·0001). Moreover, P-DPLs that were very short, long, or very long were associated with the lowest milk yields (P-PDL-XS, 377±215 l; P-PDL-l, 370±168 l; P-PDL-XL, 396±196 l). These yields were significantly lower than the yields for short and medium P-DPLs (P-DPL-S, 432±187 l; P-DPL-M, 436±191 l; P<0·0001) when averages of lactations 1–4 were analysed. These results indicate that lactations with larger MY are followed by a shorter dry period, and that a dry period of 30–90 d leads to larger yields in the next lactation. The best LNC was associated with the shortest Previous-DPL. Hence, 30–60 d should be the optimal dry period length for Lacaune sheep under intensive conditions.

scholarly journals Dry Period Length as Related to Milk Yield and SCC During the First Month of Subsequent Lactation

2015 ◽  
Vol 15 (1) ◽  
pp. 155-163 ◽  
Author(s):  
Anna Sawa ◽  
Sylwia Krężel-Czopek ◽  
Mariusz Bogucki
Keyword(s):  
Milk Yield ◽  
Somatic Cell Count ◽  
Clinical Mastitis ◽  
Period Length ◽  
Dry Period ◽  
Udder Health ◽  
Milk Samples ◽  
Clinical Changes ◽  
Daily Milk Yield ◽  
Daily Milk

Abstract Analysis was made of the effect of dry period length in primiparous and multiparous cows on daily milk yield during the first month of subsequent lactation and on milk somatic cell count (SCC) on the basis of the information about the test-day milkings of 59 138 cows. The GLM and FREQ procedures of the SAS package were used in the statistical calculations. Dry period length in the primiparous and multiparous cows had a significant effect (P≤0.01) on daily milk yield and udder health, determined based on SCC. In terms of milk yield, the most favourable dry period would be 51-70 days for both primiparous and multiparous cows. Depending on udder health, a dry period of 51-90 days can be suggested. Shorter dry periods had more undesirable effects than longer dry periods. Excessively shortened dry period (≤10 days) caused the daily milk yield to decrease by 17% in primiparous and by 13% in multiparous cows while increasing the risk of clinical changes of the cow’s udder, regardless of age. The proportion of milk samples that showed evidence of clinical mastitis also increased when the dry period was excessively long (>90 days), especially in multiparous cows.

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