131 research outputs found

    On the thyroid morphology and the level of milk yield among the progeny of goitrous and apparently normal cows

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    The thyroid morphology and the level FCM yield were studied in 84 dam-daughter pairs discarded from the Ayrshire herd of the Viik Experimental Farm. Data was divided into three groups according to the thyroid weight of the dam: less than 30 g in group I, from 30 to 50 g in group II, and 50 g or over in group III. The following mean values were obtained for the dams and their daughters: thyroid weight in grams: I 24.17 and 21.07, II 38.13 and 24.51, III 61.22 and 31.58; thyroid weight in grams per 100 kg corrected body weight (BRT): I 4.55 and 4.18, II 7.42 and 4.92, III 11.46 and 6.29; absolute amount of epithelial tissue contained per thyroid in grams (Eg); I 4.81 and 4.13, II 5.37 and 4.81, III 6.96 and 5.61; corrected body weight in kg: I 497 and 474, II 507 and 462, III 517 and 489; age in months: I 85.6 and 61.8, II 107.7 and 59.8, III 119,2 and 64.0; mean FCM yield in kg during productional lifetime; I 14.64 and 15.06, II 13.93 and 13.78, III 13.48 and 13.94; FCM yield in kg per 500 kg corrected body weight: I 14.73 and 15.87, II 13.74 and 14.92, III 13.04 and 14.28. The lower thyroid weight in daughters was apparently due to their lower body weight and age as well as to the higher iodine content of the ration. The dam-daughter correlations in respect of the thyroid weight, the BRT, the Eg, the corrected body weight, age, and FCM-yield were: I 0.13, 0.07, 0.27, 0.22, 0.25, and 0.42**, II + III 0.40**, 0.41**, 0.24, 0.07, 0.15, and 0.22, I + II + III 0.47***, 0.49***, 0.30**, 0.13, 0.16, and 0.35***. The results of this study indicate a) that the incidence of goiter was higher in the progeny of goitrous than in that of normal dams, b) that the incidence of goiter in the daughters decreased if the goitrous dam received supplemental iodine during the gestation period from which the daughter was born, c) that a heavier thyroid weight resulted in a lower FCM yield

    Effect of age on the interrelations between certain blood components and milk yield during early lactation period in Ayrshire cows injected with vitamin D3 prior to calving

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    Altogether 132 blood samples were drawn from V. jugularis of 38 apparently healthy lactating Ayrshire cows during the first 75 days following parturition. Each cow had been injected twice with 5 million I. U. of vitamin D3 shortly before calving. The cows were divided into two groups, I comprising 19 cows with 1 or 2 calvings and II 19 cows with more than 2 calvings. The blood hemoglobin (Hb), and hematocrit (Hc) values, and the amounts of calcium (Ca), inorganic phosphorus (P), and magnesium (Mg) in serum were determined and coefficients of correlation between the blood components and the level of the daily milk yield were calculated. The following significant partial correlations were obtained: in group I, for Hb with Mg (0.29*) and milk yield (—0.28*), and for Ca with milk yield (0.54***); in group II, for Hb with milk yield (—0.42***), and for Mg with P (0.25*); in groups I + II, for Hb with milk yield (—0.31***). The significance of the simple and corresponding partial correlations was very similar, and it did not make much difference whether the absolute instead of the relative daily milk yield was used as a variable in the calculations. The results are discussed in detail

    Pikkuvasikoiden ruokintakoetuloksia Maatalouden tutkimuskeskuksessa v. 1973-89

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    vokKHO22Kirjasto Aj-k. Yksikön huom.: ER

    On the development of the thyroid weight in the dairy herd of the Viik experimental farm

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    The mean thyroid weight of the growing (under 60 months old) and full-grown (over 60 months old) cows slaughtered from the Ayrshire herd of the Viik Experimental Farm during the years 1958—59 (I), 1960—65 (II) and 1966—69 (III) was as follows: 24.46 and 43.10 g (I), 21.02 and 30.16 (II) and 18.16 and 27.01 g (III) respectively. Decrease in the thyroid weight from (I) to (III) was believed to be due to the adding of iodine as a component of a mineral salt mixture into the ration of the herd in 1959. The thyroid weights of young cattle and bulls showed trends similar to those observed in cows

    Research reports of NKJ hormone symposium : Korpilampi, Finland 4-5 January 1979

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    Säilörehun korjuuasteen vaikutus naudanlihantuotantoon

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    vokKirjasto Aj-

    Sources of variation in the birth weight of Ayrshire calves

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    Sources of variation in the birth weights of 225 single Ayrshire calves, born to regular cows (calving interval less than 15 months) in the dairy herd of the Viik Experimental Farm, were studied. The mean birth weight (35.2 kg) of 111 male calves was significantly (

    A study of nutritional status of Finnish reindeer (Rangifer Tarandus L.) in differents months: I. Composition and volume of the rumen microbiota

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    The rumen microbiota were studied in free-ranging semi-domestic reindeer in Finnish Lapland under the nutritional conditions obtaining at two different sampling times. Qualitative and quantitative investigations were made of the rumen ciliate fauna and quantitative investigations of the rumen bacterial flora. The volume coefficients for rumen ciliates obtained by Westerling (1970) and that for rumen bacteria obtained by Warner (1962) were used to obtain an indication of the volume of the rumen microbe mass in reindeer. The rumen samples were collected in connection with the round-up and slaughter of reindeer, being taken from 30 animals in December and 29 animals in March. The reindeer slaughtered in December had normal access to food, but those slaughtered in March had grazed on better pastures and received a supplementary feed of hay. The total number of ciliate cells was over six times as high in March as in December, the numbers being 1 182900 and 188 300 per ml rumen contents, respectively. The corresponding total numbers of bacterial cells were 9.65 x 109 in March and 6.65 x 109 in December. The reason for the statistically significantly (P < 0.01) higher numbers in March than in December is probably the better nutritional conditions of the herd slaughtered in March, not the time of the year. The ciliate fauna consisted of 19 different species, although not all the species were found in every sample. The percentage composition of the ciliate fauna did not vary considerably between the two sampling times. The volume of the total microbe mass constituted 8.2% of the rumen contents in March and 1.9 % in December, the average being 5.1 %. The proportion of the ciliate volume in the total microbe mass was clearly higher than that of the bacteria at both sampling times: 7.2 times as high in March and 1.7 times in December, the average being 4.7 times

    Urean, urea-fosforihappo-viherjauho -yhdisteen (UPV) ja soijan vertailu raakavalkuaislähteinä maidontuotantokokeissa lehmillä

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    vokMyynti MTT:n kirjasto. Yksikön huom.: Kirjasto Aj-
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