Voluntary intake, feeding behavior and mean retention time of digesta during late pregnancy in Holstein dairy cows

The aim of the study was to compare parameters of passage of nylon capsules and digesta represented by Cr-labelled maize silage through the digestive tract of dairy cows. The capsules were made of nylon cloth (42 µm pore size, 10 mm outside diameter) and applied orally. The evaluation was carried out in dairy cows with milk yield of 19.0 kg/day. The diet (17.6 kg DM/day) consisted of maize silage, lucerne hay and concentrate. Total mean retention time (TMRT), delay time (τ), summarised compartmental mean retention time (CMRTS), and mean individual compartmental retention times (CMRT1 and CMRT2) were calculated. TMRT, τ, CMRTS, CMRT1 and CMRT2 values of nylon capsules and Cr-labelled silage were 36.2 and 45.4 h (P < 0.01), 16.2 and 8.3 h (P < 0.01), 20.1 and 37.2 h (P < 0.01), 7.8 and 8.5 h, 12.2 and 28.7 h (P < 0.05), respectively. The calculated mean retention time of nylon capsules in the reticulo-rumen (CMRTS) was shorter and in the intestines (τ) was longer than that of digesta. For this reason the estimation of digestibility using the nylon capsule method can be questionable.  

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Energy Requirements of Pregnant Holstein Dairy Cows Carrying Single or Twin Japanese Black Fetuses in Late Pregnancy

Nihon Chikusan Gakkaiho ◽

10.2508/chikusan.68.572 ◽

1997 ◽

Vol 68 (6) ◽

pp. 572-578

Author(s):

Takehiro NISHIDA ◽

Mitsunori KURIHARA ◽

Fuminori TERADA ◽

Masaki SHIBATA

Keyword(s):

Dairy Cows ◽

Late Pregnancy ◽

Energy Requirements ◽

Holstein Dairy Cows

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A note on rate of eating in sheep

Animal Science ◽

10.1017/s0003356100011442 ◽

1972 ◽

Vol 15 (2) ◽

pp. 211-214 ◽

Cited By ~ 15

Author(s):

J. M. Forbes ◽

J. A. Wright ◽

A. Bannister

Keyword(s):

Retention Time ◽

Mean Retention Time ◽

Fresh Food ◽

Ad Libitum ◽

Voluntary Intake

SUMMARYSheep ate significantly faster during the first 30 min after being offered fresh food when they were fed on ground, pelleted dried grass than when fed on long hay; chopped dried grass was eaten at an intermediate speed. Rate of eating of the unground diets was negatively related to mean retention time and positively related to total voluntary intake.In a second experiment, rate of eating during the 30 min after feeding was significantly faster when hay was fed at two-thirds of the ad libitum rate than when it was fed ad libitum, irrespective of whether penning was individual or in groups of six.

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Comparing the Effect of Oral Supplementation of Vitamin E, Injective Vitamin E and Selenium or Both during Late Pregnancy on Production and Reproductive Performance and Immune Function of Dairy Cows and Calves

The Scientific World JOURNAL ◽

10.1155/2014/165841 ◽

2014 ◽

Vol 2014 ◽

pp. 1-5 ◽

Cited By ~ 8

Author(s):

Farokh Kafilzadeh ◽

Habibollah Kheirmanesh ◽

Hamed Karami Shabankareh ◽

Mohhamad Reza Targhibi ◽

Elaheh Maleki ◽

...

Keyword(s):

Vitamin E ◽

Immune Function ◽

Dairy Cows ◽

Reproductive Performance ◽

Late Pregnancy ◽

Blood Samples ◽

Oral Supplementation ◽

Significant Difference ◽

Reproduction Performance ◽

Holstein Dairy Cows

The object of this study was to determine the effect of prepartum supplementation of vitamin E with or without injective vitamin E and selenium (Se) on productive and reproductive performances and immune function in dairy cows. Sixty multiparous Holstein dairy cows were divided randomly into three groups at the end of gestation. Cows in each group received one of three treatments: (1) a single intramuscular (im) injection of vit. E + selenium 3 weeks prepartum; (2) daily supplementation of oral vit. E given from 3 weeks prepartum to parturition; (3) injective vit. E + Se with daily supplementation of oral vit. E. Blood samples were collected from cows at calving and from calves at 0 and 7 days of age. Concentration of IgG in serum of cows and calves as well as in colostrum was determined. No significant differences among treatments occurred in the concentrations of IgG, animal, and calf production and reproduction performance. Due to the lack of significant difference between injection and oral supplementation, it is recommended to replace the injection with oral supplementation.

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The voluntary intake of roughages by pregnant and by lactating dairy cows

Animal Science ◽

10.1017/s0003356100029482 ◽

1971 ◽

Vol 13 (1) ◽

pp. 107-116 ◽

Cited By ~ 12

Author(s):

R. Marsh ◽

M. K. Curran ◽

R. C. Campling

Keyword(s):

Dairy Cows ◽

Dry Matter ◽

Post Partum ◽

Live Weight ◽

Late Pregnancy ◽

Poor Quality ◽

Significant Decline ◽

Early Lactation ◽

Voluntary Intake ◽

Daily Intakes

SUMMARY1. Effects of late pregnancy and early lactation on the voluntary intake of dried grass (Expt 1) and a poor quality seeds hay (Expt 2) by dairy cows are described. Each cow received a constant daily allocation of concentrates throughout late pregnancy. After calving half the cows received an 80% increase in concentrates, and the remainder continued to receive their pre-partum allowance.2. Mean daily intakes of dried grass were higher than those of poor quality seeds hay. Intake of dried grass in week 2 of lactation was significantly correlated with the live weight of the cows, but a non-significant correlation was observed when seeds hay was offered.3. During late pregnancy mean daily intakes of both roughages were approximately constant until the week immediately before par turition, when a significant decline occurred.4. After calving mean daily intakes of both roughages increased throughout the first six weeks of lactation by 20–30% of the intake at week 1 post partum.5. The 80% increase in daily concentrate allocation in early lactation caused a significant decline of 0·55 kg dried grass dry-matter intake per kg concentrate dry matter; the decline of 0·17 kg poor quality hay dry matter per kg concentrate dry matter was not significant.

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