scholarly journals Effects of forages and total mixed rations particle size on physical effectiveness and chewing activity of lactating cows

2011 ◽  
Vol 27 (3) ◽  
pp. 935-942
Author(s):  
B. Stojanovic ◽  
G. Grubic ◽  
N. Djordjevic ◽  
A. Bozickovic ◽  
A. Ivetic
Keyword(s):  
Particle Size ◽  
Fiber Content ◽  
Corn Silage ◽  
Total Mixed Ration ◽  
Lactating Cows ◽  
Particle Length ◽  
Chewing Activity

In study are determined effects of four different mean lengths of corn silage, alfalfa haylage and total mixed ration (TMR) for lactating cows on physical effectiveness (pef), physically effective fiber content (peNDF) and total chewing activity. High correlations were found between mean particle length of forages and TMR and their physical effectiveness in lactating cows nutrition as also with physically effective fiber content. Significant effect of ration particle size on stimulating total chewing activity of lactating cows was determined.

The effect of reducing alfalfa hay cut length on TMR particle size distribution, rumen pH and chewing activity of cows in early lactation using Penn State Particles Separator(PSPS)

2005 ◽  
Vol 2005 ◽  
pp. 75-75
Author(s):  
A. Khezri ◽  
A. Nikkhah ◽  
A. Zare Shahneh ◽  
M. H. Fooladi
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Rumen Ph ◽  
Alfalfa Hay ◽  
Penn State ◽  
Nutritional Needs ◽  
Particle Length ◽  
Chewing Activity ◽  
Proper Length

The ability of a ration to meet the nutritional needs of a high yielding dairy cow requires understanding of both the chemical and physical characteristics of the ration (NRC, 2001). Having the proper particle size distribution (2 to 8 percent of the particles on the upper sieve, 30 to 50 percent on the middle and lower sieves, and no more than 20 percent on the bottom pan) of feeds is an important part of ration formulation. Chopping the crop at the proper length produces forages that can be combined to achieve the desired particle length in a TMR. The dairy cow’s need for increasingly higher levels of energy have led to diets relatively high in concentrates. However, cows still require adequate fibre in the ration to function properly (Allen, 2000). Adequate forage particle length is necessary for proper rumen function and reduced forage particle size has been shown to decrease the time spent chewing and cause a trend toward decreased rumen pH. When cows spend less time chewing, they produce less saliva, which is needed to buffer the rumen. The objective of this study was to evaluate the effects of reducing alfalfa hay length of cut on TMR particle size distribution, rumen pH and chewing activity using penn state particles separator.

scholarly journals Effect of Total Mixed Ration Particle Size on Rumen pH, Chewing Activity, and Performance in Dairy Cows

2003 ◽  
Vol 16 (12) ◽  
pp. 1755-1762 ◽  
Author(s):  
M. M. Schroeder ◽  
H. W. Soita ◽  
D. A. Christensen ◽  
G. R. Khorasani ◽  
J. J. Kennelly
Keyword(s):  
Particle Size ◽  
Dairy Cows ◽  
Total Mixed Ration ◽  
Rumen Ph ◽  
And Performance ◽  
Chewing Activity

NITROGEN UTILIZATION BY LACTATING COWS FED UREA-TREATED CORN SILAGE OR GRASS SILAGE

1973 ◽  
Vol 53 (2) ◽  
pp. 333-337
Author(s):  
D. E. WALDERN
Keyword(s):  
Crude Protein ◽  
Dry Matter ◽  
Fiber Content ◽  
Nitrogen Utilization ◽  
Corn Silage ◽  
Neutral Detergent Fiber ◽  
N Balance ◽  
Acid Detergent Fiber ◽  
Grass Silage ◽  
Lactating Cows

Nitrogen utilization was studied when eight lactating cows were offered ad libitum urea-treated corn silage (15.3% crude protein) or grass silage (14.5% crude protein), plus a grain ration at 1 kg grain to 3.5 kg of 4% fat-corrected milk, in a digestion and nitrogen (N) balance trial. Analyses of the forages indicated greater acid detergent fiber content for the grass than for the corn silage: 46.8 and 35.1% on a dry matter basis, respectively. Digestibility of dry matter, energy, crude protein, true protein, acid detergent fiber, neutral detergent fiber, and N balance were significantly greater (P < 0.05) for cows fed urea–corn silage than for those fed grass silage. The nitrogen of urea–corn silage was used more efficiently for milk and tissue protein synthesis. Decreased nitrogen utilization for cows fed grass silage was associated with lower energy and higher acid detergent fiber content for grass silage than for urea–corn silage.

0459 Effect of digestible fiber content of barley silage on lactation performance and chewing activity of lactating dairy cows in comparison with corn silage

2016 ◽  
Vol 94 (suppl_5) ◽  
pp. 219-219
Author(s):  
B. Refat ◽  
D. A. Christensen ◽  
J. J. McKinnon ◽  
J. Nair ◽  
A. D. Beattie ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Fiber Content ◽  
Corn Silage ◽  
Lactation Performance ◽  
Lactating Dairy Cows ◽  
Barley Silage ◽  
Chewing Activity

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.

Survey of mean particle length in whole-plant corn silage

2017 ◽  
Vol 33 (6) ◽  
pp. 708-715
Author(s):  
G.G.S. Salvati ◽  
L.F. Ferraretto ◽  
G.S. Dias Júnior ◽  
F.L. Drago ◽  
R.D. Shaver
Keyword(s):  
Corn Silage ◽  
Whole Plant ◽  
Particle Length

scholarly journals Performance and blood parameters of Holstein/Zebu crossbred heifers fed with two tannins sources

2020 ◽  
Vol 9 (2) ◽  
pp. e128922150
Author(s):  
Carla Giselly de Souza ◽  
Severino Gonzaga Neto ◽  
Lara Toledo Henriques ◽  
Gherman Garcia Leal Araújo ◽  
Luciana Thie Seki Dias ◽  
...  
Keyword(s):  
Milk Production ◽  
Tannic Acid ◽  
Condensed Tannin ◽  
Blood Parameters ◽  
Corn Silage ◽  
Neutral Detergent Fiber ◽  
The Other ◽  
Total Carbohydrate ◽  
Lactating Cows ◽  
Significant Difference

The present research objective was to evaluate the performance and blood parameters of lactating cows fed with a diet of two tannin sources, based on sorghum (condensed tannin)  with increasing concentrations of tannic acid (hydrolyzable tannin’s). Increasing levels of tannic acid in a sorghum-based diet for five Holstein/Zebu crossbred lactating cows were subject to a 5 × 5 Latin square experimental design. To assess the effect on cow intake, digestibility, milk production, and blood parameters. All cows received 9.87 kg/DM of corn silage as roughage and 6.38 kg of concentrate consisting of 2.58 kg/DM of ground sorghum 0.87 kg/DM of cornmeal 1.32 kg/DM of soybean bran 0.44 kg/DM of wheat bran 0.2 kg/ DM of urea and 0.18 kg/ DM of mineral mixture. Diet 1 (control) contained low-tannin sorghum and the other diets contained high-tannin sorghum. The levels of tannic acid added to the diets were established based on the quantity of condensed tannin in high-tannin sorghum. Thus, diets 2, 3, 4 and 5 were supplemented with 1.5g (13.%DM), 79.5g (2.6%DM), 157.5g (3.9%DM) and 235.5g (5.2%DM) of tannic acid, totalling 0.078, 0.156, 0.234 and 0.321 total tannin kg/day respectively, to assess the effect on microbial protein synthesis. The diets contained 35 kg of corn silage (roughage) and 6.40 kg of concentrate. The natural and dry matter intake did not significantly differ between groups, except for ether extract (EE) intake that significantly differed. The DM apparent digestibility, crude protein, EE, neutral detergent fiber, total carbohydrate, and non-fibrous carbohydrate did not differ (P > 0.05) with the increase in dietary tannin supplementation. The GOT levels increased linearly. The blood glucose, triglyceride, and cholesterol (total, LDL and HDL) levels did not significantly differ. Hemoglobin showed a significant difference. No significant difference in urea, creatinine and uric acid occurred. Diets using two tannins sources supplementation caused no decrease in the dietary intake or digestibility in the animals. The GOT level changed significantly, showing linear behavior, however below the toxicity level, without any change in the other blood parameters. Milk production decreased with the increase in dietary tannin supplementation. 

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