scholarly journals Development of Predictive Equations for Milk Yield and Dry Matter Intake in Lactating Cows

1977 ◽  
Vol 60 (11) ◽  
pp. 1739-1754 ◽  
Author(s):  
C.A. Brown ◽  
P.T. Chandler ◽  
J.B. Holter
Keyword(s):  
Milk Yield ◽  
Dry Matter ◽  
Dry Matter Intake ◽  
Predictive Equations ◽  
Lactating Cows

Effect of Body Condition at Calving and Dietary Energy Supply on Milk Yield, Milk Quality and Dry-Matter Intake in Lactating Cows

1988 ◽  
Vol 1988 ◽  
pp. 111-111
Author(s):  
G.P. Jones ◽  
P.C. Garnsworthy
Keyword(s):  
Milk Yield ◽  
Body Condition ◽  
Dry Matter ◽  
High Energy ◽  
Dry Matter Intake ◽  
Dietary Energy ◽  
Lactating Cows ◽  
Fat Reserves ◽  
Voluntary Feed Intake ◽  
Lactating Dairy Cows

Recent work concluded that when lactating dairy cows are fed a relatively high energy diet (Garnsworthy and Jones, 1987), increasing the dietary undegradable protein (UDP) supply to those which are fat at calving leads to increased mobilisation of body fat reserves; however, increasing the UDP supply to those which are thin at calving results in reduction of voluntary feed intake, but does not affect the change in condition or milk yield. Little difference was found in yields of cows fat at calving receiving a relatively high UDP diet post calving, and cows thin at calving receiving a high or low UDP diet. Similar results were obtained with diets of lower energy and protein content (Jones and Garnsworthy, 1987). The investigation reported here aimed to examine the effect of body condition at calving on the response to energy level in the diet.

THE INVESTIGATION OF SODIUM BICARBONATE OR BENTONITE AS SUPPLEMENTS IN SILAGES FED TO LACTATING COWS

1983 ◽  
Vol 63 (4) ◽  
pp. 939-947 ◽  
Author(s):  
L. J. FISHER ◽  
V. G. MACKAY
Keyword(s):  
Sodium Bicarbonate ◽  
Milk Yield ◽  
Dry Matter ◽  
Volatile Fatty Acids ◽  
Latin Square ◽  
Corn Silage ◽  
Dry Matter Intake ◽  
Feed Conversion ◽  
Grass Silage ◽  
Lactating Cows

Two experiments with lactating Holsteins were carried out to determine the effectiveness of sodium bicarbonate (NaHCO3) or bentonite, added to silage prior to feeding, as a means of increasing dry matter intake. In the first trials the feed, consisting of 10% grain mixture, 45% grass silage and 45% corn silage, was supplemented with 0, 0.6 or 1.2% bentonite in a 3 × 3 latin square utilizing 12 cows and 28-day test periods. Neither level of bentonite improved dry matter intake or milk yield. Milk composition, molar proportions of rumen volatile fatty acids, plasma calcium and phosphorus were not influenced by additions of bentonite. Apparent dry matter digestibility was significantly reduced (P < 0.05) by the addition of bentonite at the 0.6 and 1.2% levels compared to the cows fed the unsupplemented ration. The digestibility of acid detergent fiber was lower (P < 0.05) for cows fed the silage mixture supplemented with 1.2% bentonite than for the controls. In the second trial a silage mixture consisting of approximately 30% grass silage and 70% corn silage was supplemented with either 0.8% NaHCO3, 2.1% bentonite or neither and fed in a 3 × 3 latin square utilizing 15 cows and 28-day treatment periods. Compared to control cows, neither NaHCO3 nor bentonite had any significant (P > 0.05) influence on dry matter intake, milk yield or rumen fermentation. However, the addition of NaHCO3 to the silage improved milk yield and feed conversion (P < 0.05) when compared to cows fed the silage supplemented with bentonite. It was concluded from these trials that bentonite should not be used as a supplement to silage diets fed to lactating cows. The results suggested that NaHCO3 supplementation had little if any beneficial effect when grass silage made up approximately 30% of the total diet. Key words: NaHCO3, bentonite, lactating cows, silage intake, digestibility

Responses of lactating cows to energy and protein supplementation while grazing a restricted allowance of grass

1998 ◽  
Vol 1998 ◽  
pp. 195-195 ◽  
Author(s):  
D.C. Patterson ◽  
F.J. Gordon ◽  
C.P. Ferris ◽  
C.S. Mayne
Keyword(s):  
Milk Yield ◽  
Dry Matter ◽  
Substitution Effect ◽  
Protein Supplementation ◽  
Dry Matter Intake ◽  
Lactating Cows ◽  
Yield Responses

Earlier work has indicated low responses in milk yield to supplementation with concentrates during grazing (Leaver, 1985). The substitution effect of concentrates on herbage dry matter intake is high at generous allowances of grass, but is much lower when the allocation of grass is low (Meijs and Hoekstra, 1984). It is therefore expected that the responses in milk yield to supplementation with concentrates during grazing would be greater with a restricted allowance of grass. The aim of the experiment was to measure the milk yield responses of high yielding cows to increased energy and protein supplementation, when offered a restricted allowance of grass.

scholarly journals Effects of short-term feed restriction on the physiological parameters and metabolites of F1 Holstein x Zebu cows in different stages of lactation

2020 ◽  
Vol 72 (4) ◽  
pp. 1545-1554
Author(s):  
L.A. Borges ◽  
J.R.M. Ruas ◽  
V.R. Rocha Júnior ◽  
C.C.S. Carvalho ◽  
F.P. Monção ◽  
...  
Keyword(s):  
Milk Yield ◽  
Cost Reduction ◽  
Dry Matter ◽  
Dry Matter Intake ◽  
Feed Restriction ◽  
Short Term ◽  
Lactating Cows ◽  
Stage Of Lactation ◽  
Esterified Fatty Acids ◽  
Zebu Cows

ABSTRACT This study aimed to evaluate the effects of different nutritional plans on the productive, physiological and metabolic parameters of F1 ½ Holstein x ½ Zebu cows in different stages of lactation. Sixty lactating cows were allotted to a completely randomized 5 x 3 factorial design with five feed allowances and three lactation periods. The dry matter intake, milk yield and heart rate were reduced by 5.69kg, 2.41kg and 10.36 beats/min (morning) and 10.25 beats/min (afternoon) for each 1% feed restriction, respectively. There was no difference in the concentration of glucose, total protein, albumin, cholesterol and non-esterified fatty acids for cows subjected to different feed allowances, with means of 95.25, 7.98, 2.95, 121.68 and 0.45mg/dL, respectively. Feed restriction of up to 2.50% BW is a cost reduction strategy that does not alter milk yield, regardless of the stage of lactation.

scholarly journals Dry matter intake and milk yield of cows grazing Xaraés palisadegrass under different management strategies

2019 ◽  
Vol 41 (1) ◽  
pp. 46843
Author(s):  
Vinícius Emanoel Carvalho ◽  
Saulo Alberto do Carmo Araújo ◽  
Danilo De Oliveira Alves ◽  
Carlos César dos Santos ◽  
Norberto Silva Rocha
Keyword(s):  
Body Weight ◽  
Milk Yield ◽  
Dry Matter ◽  
Management Strategies ◽  
The Body ◽  
Dry Matter Intake ◽  
The Third ◽  
Lactating Cows ◽  
Lactation Stage ◽  
Grazing Strategies

This study aimed to evaluate the intake and milk yield of crossbred cows (Holstein x Zebu), under two management strategies, based on 95% light interception and fixed days. Eight lactating cows with body weight of 466 kg (± 35 kg) and lactation stage of 137 days (± 107 days) were used, four animals were assigned to each treatment. Dry matter intake was estimated indirectly, using neutral detergent insoluble fiber as internal indicator and chromium oxide as external indicator. This was a completely randomized design, with four replications, two grazing strategies and three days of occupation. The animals under light management showed dry matter intake on the first day (11.42 kg) similar to the second day (9.57 kg), and this was similar to the third day (7.06 kg), but the intake on the first day was greater than on the third day. On the fixed days, intake did not differ between the first and second day (12.05 and 11.47 kg, respectively), and intake of the third day (6.70 kg) was lower than in the first two days. The dry matter intake in relation to the body weight of the animals presented similar results to the dry matter intake of forage in kilos, which can be explained by the small difference in weight between the mean of the groups. The individual milk yield showed a similar behavior among the grazing strategies for the days of occupation, which increased from the first to the second day (12.49 to 13.88 kg) and decreased from the second to the third day (12.20 kg). Grazing management strategies did not promote differences in the performance traits of lactating cows. The day of grazing during the period of occupation can be decisive for intake and production.

Responses of lactating cows to energy and protein supplementation while grazing a restricted allowance of grass

1998 ◽  
Vol 1998 ◽  
pp. 195-195
Author(s):  
D.C. Patterson ◽  
F.J. Gordon ◽  
C.P. Ferris ◽  
C.S. Mayne
Keyword(s):  
Milk Yield ◽  
Dry Matter ◽  
Substitution Effect ◽  
Protein Supplementation ◽  
Dry Matter Intake ◽  
Lactating Cows ◽  
Yield Responses

Earlier work has indicated low responses in milk yield to supplementation with concentrates during grazing (Leaver, 1985). The substitution effect of concentrates on herbage dry matter intake is high at generous allowances of grass, but is much lower when the allocation of grass is low (Meijs and Hoekstra, 1984). It is therefore expected that the responses in milk yield to supplementation with concentrates during grazing would be greater with a restricted allowance of grass. The aim of the experiment was to measure the milk yield responses of high yielding cows to increased energy and protein supplementation, when offered a restricted allowance of grass.

scholarly journals Predicting Daily Dry Matter Intake Using Feed Intake of First Two Hours after Feeding in Mid and Late Lactation Dairy Cows with Fed Ration Three Times Per Day

Animals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 104
Author(s):  
Shulin Liang ◽  
Chaoqun Wu ◽  
Wenchao Peng ◽  
Jian-Xin Liu ◽  
Hui-Zeng Sun
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Dry Matter ◽  
Prediction Equation ◽  
Dry Matter Intake ◽  
Validation Dataset ◽  
Nutrient Requirements ◽  
Independent Dataset ◽  
Lactating Dairy Cows ◽  
Proposed Model

The objective of this study was to evaluate the feasibility of using the dry matter intake of first 2 h after feeding (DMI-2h), body weight (BW), and milk yield to estimate daily DMI in mid and late lactating dairy cows with fed ration three times per day. Our dataset included 2840 individual observations from 76 cows enrolled in two studies, of which 2259 observations served as development dataset (DDS) from 54 cows and 581 observations acted as the validation dataset (VDS) from 22 cows. The descriptive statistics of these variables were 26.0 ± 2.77 kg/day (mean ± standard deviation) of DMI, 14.9 ± 3.68 kg/day of DMI-2h, 35.0 ± 5.48 kg/day of milk yield, and 636 ± 82.6 kg/day of BW in DDS and 23.2 ± 4.72 kg/day of DMI, 12.6 ± 4.08 kg/day of DMI-2h, 30.4 ± 5.85 kg/day of milk yield, and 597 ± 63.7 kg/day of BW in VDS, respectively. A multiple regression analysis was conducted using the REG procedure of SAS to develop the forecasting models for DMI. The proposed prediction equation was: DMI (kg/day) = 8.499 + 0.2725 × DMI-2h (kg/day) + 0.2132 × Milk yield (kg/day) + 0.0095 × BW (kg/day) (R2 = 0.46, mean bias = 0 kg/day, RMSPE = 1.26 kg/day). Moreover, when compared with the prediction equation for DMI in Nutrient Requirements of Dairy Cattle (2001) using the independent dataset (VDS), our proposed model shows higher R2 (0.22 vs. 0.07) and smaller mean bias (−0.10 vs. 1.52 kg/day) and RMSPE (1.77 vs. 2.34 kg/day). Overall, we constructed a feasible forecasting model with better precision and accuracy in predicting daily DMI of dairy cows in mid and late lactation when fed ration three times per day.

A COMPARISON OF TWO METHODS OF COMBINING ALFALFA CUBES WITH CORN SILAGE FED TO LACTATING COWS

1977 ◽  
Vol 57 (3) ◽  
pp. 559-565
Author(s):  
L. J. FISHER
Keyword(s):  
Milk Yield ◽  
Dry Matter ◽  
Protein Digestibility ◽  
Corn Silage ◽  
Feeding Time ◽  
Plasma Urea ◽  
Lactating Cows ◽  
Fat Yield ◽  
Changeover Period ◽  
Feeding Systems

Sixteen Holstein cows in early lactation were assigned to a switch-back experiment consisting of two experimental periods 35 days in length separated by a 7-day changeover period. Treatments consisted of two feeding systems, alfalfa cubes ensiled with corn silage or alfalfa cubes fed with the corn silage. When cows were fed corn–alfalfa cube silage they consumed more forage, 2.26 vs. 2.16% of body weight per cow per day than when they were fed the alfalfa cubes with the silage. Fat-corrected milk yield was somewhat higher, 25.4 vs. 24.0 kg/day; fat percent and fat yield were greater, 3.13 vs. 2.70% and 918 vs. 814 g/day for corn–alfalfa cube silage as compared to cubes added at feeding time. However, milk yield was greater, 29.9 vs. 29.1 kg/day, and milk lactose percent was greater, 5.26 vs. 5.18% for cows fed cubes at feeding time compared to cows fed corn–alfalfa cube silage. There was no difference between feeding systems in blood minerals or metabolites with the exception of plasma urea nitrogen which was higher, 20.2 vs. 17.2 mg %, for the alfalfa cubes fed with the corn silage. Apparent dry matter and protein digestibility for the total ration were 68.1 and 71.6% when corn alfalfa cube silage was fed compared to 65.4 and 68.5% when the cubes were fed with the corn silage (P < 0.05). It was concluded from this study that alfalfa cubes ensiled with corn silage was an effective method of increasing the dry matter and protein content of corn silage and in improving the digestibility of the total ration.

Sign in / Sign up

Export Citation Format

Share Document