Seasonal body weight, body condition, and lactational trends in muskoxen

1989 ◽  
Vol 67 (5) ◽  
pp. 1125-1133 ◽  
Author(s):  
R. G. White ◽  
D. F. Holleman ◽  
B. A. Tiplady
Keyword(s):  
Body Weight ◽  
Milk Production ◽  
Body Fat ◽  
Dry Matter ◽  
Late Summer ◽  
Matter Content ◽  
Winter Period ◽  
Dry Matter Content ◽  
Body Protein ◽  
Ovibos Moschatus

Seasonal patterns of body weight, fat, protein, milk quality (dry matter content), and milk production rate were determined for three sexually mature female muskoxen (Ovibos moschatus) over three consecutive lactation periods. Females were allowed to graze in summer and had access to hay year-round. A high-protein pelleted ration supplemented this diet. Following calving in early May (1984, 1986) or June (1985), body weight remained constant throughout the summer, body fat declined for 3–5 weeks after calving, and body protein declined transiently during the latter period. Almost all annual gains in body weight and body fat occurred during the 6- to 8-week rutting period from mid-August to mid-October. High milk production (1.3–2.4 L/d) occurred 3 weeks post-calving, generally remained high for another month, and declined to 1.2 ± 0.15 L/d (mean ± SEM) just before the rut. A major decline in milk production, to 0.44 ± 0.050 L/d, occurred during the rut. Although milk dry matter increased 33% ± 4.3% during the rut, this increase was offset by the 60% ± 6.4% decline in milk production. All females successfully reproduced each year of the study and no evidence was found for a lactational anestrum. The hypothesis that gains in body weight must be made before the rutting period to maximize conception rate was rejected. This study highlighted the importance to lactating muskoxen of the late summer – early winter period for annual regain in body weight and body fat, which occurred concurrently with ovulation and conception.

scholarly journals RESEARCH OF THE QUALITATIVE COMPOSITION OF MILK OF COWS OF UKRAINIAN BROWN DAIRY BREED

2017 ◽  
Vol 53 ◽  
pp. 185-190
Author(s):  
Y. I. Sklyarenko ◽  
T. O. Chernyavska ◽  
L. V. Bondarchuk
Keyword(s):  
Quality Indicators ◽  
Milk Production ◽  
Dry Matter ◽  
Fat Content ◽  
Matter Content ◽  
Milk Quality ◽  
State Enterprise ◽  
Dry Matter Content ◽  
Qualitative Composition ◽  
Dairy Breed

The aim of the research – is to study the qualitative composition of milk of cows of Ukrainian brown dairy breed in terms of households and in the context of genealogical descent. Method. Research conducted under the conditions of the State Enterprise "Pilot Farm of the Institute of Agriculture of Northern East of NAAS» in Sumy region, Enterprize of Additional Liability “Mayak” in Trostyanetc region, State Enterprise "Pilot Farm Agricultural Firm “Nadiya” of the Institute of Agriculture of Northern East of NAAS» in Romny region. Milk production was assessed by monthly milking control with sampling of milk. Quality indicators measured in the laboratory of the former Sumy State Breeding Center on the equipment of Bentley. We investigated the percentage of fat, percentage of protein, including casein, percentage of dry matter, skimmed residue, contents of somatic cells. Biometric processing of results was carried out by the conventional method (Plohynskoho M.O., 1969), using software Statistica 6.0. The results of the research. Studies have been conducted on the content of fat, protein, casein, lactose and somatic cell count in cow milk. Established difference of qualitative composition of milk of cows depending on the households and on the genealogical origin of the animals. Analysis of our studies indicate that the level of quality indicators of milk production of animals of Ukrainian brown dairy breeds in different farms is significantly different. All the main indicators of quality prevailed in animals of Enterprize of Additional Liability “Mayak”. For the fat content of milk cows of Distinkshna line 159523 were dominated. They though not significantly, but dominated the animals of Eleganta 148551 and Laddi 125640 lines for 0.16% and 0.19% respectively. The substantial significant difference of the content of lactose in the milk of cows of different lines is not set. Animals of Distinkshna line 159523 significantly superior cows of Eleganta 148551 and Laddi 125640 lines for the protein, for 0,24% (P < 0,05) and 0,32% (P < 0,05) respectively. For the casein content they were significantly superior then Laddi 125640 line cows – on 0,24% (P < 0,05). For the dry matter content and skimmed milk residue animals of Distinkshna line 159523 also have the advantage. Conclusions. As a result of studies found that the level of quality indicators of milk production in animals of Ukrainian brown dairy breed in different farms is significantly different. So fat content in milk varies 3,43–3,98%; protein content – 3,10–3,55%; casein content – 2,83–3,31%; dry matter content – 12,4–13,1%, fat-free dry milk residue – 8,95–9,13%. The dependence of milk quality indicators based on linear descent. For the main indices are preferred animals of Distinkshna line 159523.

scholarly journals Study of knotweed (Reynoutria) as possible phytomass resource for energy and industrial utilization

2010 ◽  
Vol 56 (No. 3) ◽  
pp. 85-91 ◽  
Author(s):  
Z. Strašil ◽  
J. Kára
Keyword(s):  
Heavy Metals ◽  
Czech Republic ◽  
Dry Matter ◽  
Matter Content ◽  
Ash Content ◽  
Winter Period ◽  
Dry Matter Content ◽  
Reynoutria Japonica ◽  
The Czech Republic ◽  
The Impact

This paper deals with the Reynoutria &times; bohemica and Reynoutria japonica under conditions of the Czech Republic. It evaluates the impact of soil, weather conditions and various terms of harvest (autumn, spring) on the yield, dry matter content, phytomass loss, ash content, and basic elements content change in plants. Heavy metals content was determined in soil where plants were grown and consequently in plants themselves. The average yield of dry matter at the fully closed stands of Reynoutria japonica were 9.06 t/ha in autumn, Reynoutria &times; bohemica from 13.23 to 21.41 t/ha, according to the site. The yield losses within the winter period were found on average 42% for Reynoutria japonica and 34% for Reynoutria &times; bohemica. The moisture decrease of Reynoutria japonica was found from 68% in the autumn to 24% in the spring, and of Reynoutria &times; bohemica from 67% to 23%, respectively. Decreased content of nitrogen, phosphorus, potassium, calcium, and magnesium in the knotweed phytomass was found during the latter (spring) harvest periods in comparison with the earlier harvest periods. Decreased elements content in phytomass during the latter harvest period (spring) increases the phytomass quality as a fuel from both aspects &ndash; technical and emissions generation. The ash content in plants varied according to the site, on average from 3.12% in Ruzyně to 4.6% in Chomutov. None of the heavy metals monitored in knotweed plants reached the maximum admissible values determined for the food or feed purposes in the Czech Republic. From the results of combustion experiments, it is evident that Reynoutria &times; bohemica is a good fuel. Energy sorrel shows the extreme CO concentration in flue gases in comparison with other monitored fuels. According to the ČSN EN 12809 (2001) standard it does not meet even the third class of requirements. On the contrary, knotweed and wood bark fulfill the requirements for the first class. The surprising fact is that both of these fuels show the lower level of CO emissions, than the wooden briquettes. Concentrations of nitrogen oxids are comparable with biofuels, except of wood, and probably are related to the nitrogen content in heating material.

The effect of interval between harvests and wilting on silage for milk production

1980 ◽  
Vol 31 (1) ◽  
pp. 35-41 ◽  
Author(s):  
F. J. Gordon
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Body Condition ◽  
Dry Matter ◽  
Body Condition Score ◽  
Live Weight ◽  
Experimental Period ◽  
Matter Content ◽  
Blood Analysis ◽  
Dry Matter Content

ABSTRACTSeventy-two British Friesian cows, with a mean calving date of 21 January, were used in a 3 × 2 factorial design experiment to assess the effects of the interval between harvest and wilting on the value of grass silage for milk production. Three regrowth intervals of 5, 7 and 9 weeks were used with each material ensiled both unwilted and after wilting to a dry-matter content of approximately 450g/kg. The six silages were offered ad libitum in addition to 7·6 kg concentrates per day, from day 8 of lactation until 13 April, with a mean experimental period of 67·5 days. The mean intakes of silage dry matter were 11·2, 9·8 and 8·7 kg/day for the 5-, 7 and 9-week regrowth intervals respectively and 9·6 and 10·2kg/day for the unwilted and wilted silages respectively. Regrowth interval significantly affected milk yield with mean yields of 24·7, 24·2 and 22·5 (s.e. 047) kg/day being obtained for the 5-, 7- and 9-week intervals respectively. Wilting significantly depressed milk yield with mean yields of 24·8 and 227 (s.e. 0·39) kg/day being recorded with the unwilted and wilted materials respectively. Live weight at the end of the experiment was not significantly affected by any of the treatments but the rate of live-weight loss, calculated by linear regression over the experiment, and loss in body condition score both significantly increased with increasing regrowth interval. Wilting had no effect on live weight or body condition. Increasing the regrowth interval also significantly reduced the solids-not-fat and protein contents of the milk produced during the final week of the experiment but no other significant effects were recorded on milk composition.Blood analysis data are presented: blood urea was the only component affected by the treatments and decreased significantly as regrowth interval increased.

Experiments on the use of home-grown foods for milk production: I. The effect of war-time changes in the food supply on the nutrient intake and milk production of dairy cows

1944 ◽  
Vol 34 (1) ◽  
pp. 22-26 ◽  
Author(s):  
K. L. Blaxter
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Dry Matter ◽  
Matter Content ◽  
Dry Matter Content ◽  
High Dry Matter ◽  
Time Changes ◽  
The Individual ◽  
Sufficient Food ◽  
Adequate Method

1. An experiment has been conducted with dairy cows to find the effect on milk production of feeding rations with a high dry-matter content—typical war-time rations.2. It was found that where a ration high in dry matter is fed, the cow tends to refuse food, and a statistically significant fall in milk production results. The correlation between the refusal of food, calculated in terms of starch equivalent, and the fall in milk production was 0·959.3. The factors causing this inability of the cow to consume sufficient food to meet her total nutrient requirements have been considered. It has been concluded that dry-matter consumption is not an adequate method of expressing the amount of food a cow will consume, and that the major factor influencing food consumption is the palatability of the individual foods making up the ration.My thanks are due to Dr S. J. Rowland for chemical analysis of the individual foods used in the experiments.

Compensatory growth in immature sheep: I. The effects of weight loss and realimentation on the whole body composition

1975 ◽  
Vol 85 (2) ◽  
pp. 193-204 ◽  
Author(s):  
K. R. Drew ◽  
J. T. Reid
Keyword(s):  
Body Composition ◽  
Body Weight ◽  
Body Fat ◽  
Good Predictor ◽  
Dry Matter ◽  
Body Water ◽  
The Body ◽  
Whole Body ◽  
Body Protein ◽  
Ad Libitum

SUMMARYForty-eight cross-bred wether lambs were used to measure the effects of severe feed restriction and realimentation on the body and carcass composition of immature sheep. Ten of the total number of sheep were used as an initial slaughter group, 12 were continuously fed (six at the ad libitum level of intake and six at 70% ad libitum), 26 were progressively underfed and 18 of them were realimented after a mean loss of about 25% empty body weight (EBW).Shrunk body weight (SBW = weight after an 18-h fast with access to water) was a good predictor of empty body weight (EBW = SBW minus gastro-intestinal contents) and the EBW of continuously growing sheep was a good predictor of body water, protein, fat, energy and ash, but it was not precise after realimentation, particularly in the early stages of refeeding. Restricted continuous supermaintenance feeding did not alter the body composition of the sheep from that of the sheep on the ad libitum intake at any given EBW except slightly to increase the carcass protein content.Although underfeeding to produce an EBW loss of 25% generally produced changes in the chemical body components which were similar to a reversal of normal growth, body fat did not decrease during the first half of the submaintenance feeding and did not increase during the first 2 weeks of realimentation. Under all circumstances percentage body fat was very closely related to percentage body water.Sheep realimented at 26 kg (after losing 25% EBW) contained, at 45 kg EBW, more bodywater and protein and less fat and energy than continuously-fed animals of the same EBW. The treatment effects were greater in the carcass and had little effect on the non-carcass EBW, with th e result that the refed sheep had 1800 g more water × protein in a carcass that weighed 700 g more than one from a normally grown sheep of the same EBW. The regression of calorific value of th e ash-free dry matter on body fat as a percentage of ash-free dry matter gave calorific values of body protein and fat as 5·652 and 9·342 kcal/g of ash-free dry matter, respectively.

Statistical research on the fate of water in the adult cow. II. The lactating cow

1970 ◽  
Vol 75 (2) ◽  
pp. 251-255 ◽  
Author(s):  
R. Paquay ◽  
R. De Baere ◽  
A. Lousse
Keyword(s):  
Milk Production ◽  
Water Intake ◽  
Dry Matter ◽  
Matter Content ◽  
Dry Matter Intake ◽  
Dry Matter Content ◽  
Total Water ◽  
Water Losses ◽  
Daily Milk Production ◽  
Total Water Intake

SUMMARYStatistical tests were made on the data obtained from 100 non-pregnant lactating cows, whose milk production ranged from 4 to 22 kg/day. The cows were kept in metabolism stalls and fed 37 different rations.The authors have studied the correlation between total water intake, faecal and urinary water losses, absorbed and available water and the numerous other factors which were analysed in each of the 37 rations.Total water intake is closely related to the dry-matter intake and the dry-matter content of the diet; it is related also to the composition of the ingested dry matter but is unrelated to the daily milk production.Faecal water losses are closely related to the dry-matter intake and the dry-matter content of the diet; increase of pentosans and crude-fibre intake enhances the losses.Urinary water excretion is related to the amount of absorbed water and to the dry-matter content of the diet; a highly significant correlation exists also between urinary water and urinary nitrogen and potassium. Daily milk production and urinary water are negatively correlated.Water secretion in the milk depends on the dry-matter intake and on its composition; but there is no significant correlation between total water intake and milk water.

The effect of pattern of concentrate allocation on milk production from autumn-calving heifers

1982 ◽  
Vol 34 (1) ◽  
pp. 55-61 ◽  
Author(s):  
F. J. Gordon
Keyword(s):  
Milk Yield ◽  
Dry Matter ◽  
Milk Composition ◽  
Matter Content ◽  
Winter Period ◽  
Dry Matter Content ◽  
Single Group ◽  
Digestible Organic Matter ◽  
First 90 Days ◽  
Block Experiment

ABSTRACTForty-four British Friesian, first-lactation heifers were used in a randomized block experiment over a 2-year period to examine the effects of two patterns of concentrate allocation during the post-calving, indoor feeding period. The animals, mean calving date 17 October (s.d. 15 days), were offered concentrates either on a high-low system consisting of 80kg/day for the first 90 days of lactation and thereafter 5-4kg/day, or on a uniform system in which 6-8 kg/day was offered from calving until going to pasture (mean of 182 days). In addition, all animals received access ad libitum to grass silage, with a mean dry-matter content and digestible organic matter in the dry matter value of 218 and 679g/kg respectively. During the 1st year all 22 animals were housed as a single group, but in the 2nd year the animals were housed in individual stalls and silage intakes recorded for all replicates. In each year all animals grazed as a single group at pasture without supplementary concentrates.Total concentrates consumed were 1163 and 1187 (s.e. 19·4)kg for the high-low and uniform treatments respectively. Although the animals on the high-low treatment reached a higher peak milk yield, there were no significant differences in milk yield over the winter period, 3257 and 3311 (s.e. 41·5) kg, or total lactation, 4862 and 4886 (s.e. 80·6)kg, for the high-low and uniform treatments respectively. The animals on the high-low treatment, however, were significantly lighter in body weight at the end of the winter but there was no difference between treatments at the end of lactation. Milk composition data are also presented.

The effect of wilting berseem and lucerne herbage on voluntary dry-matter intake by buffalo heifers

1970 ◽  
Vol 74 (1) ◽  
pp. 47-51 ◽  
Author(s):  
K. Yoelao ◽  
M. G. Jackson ◽  
Ishwar Saran
Keyword(s):  
Body Weight ◽  
Dry Matter ◽  
Nutritive Value ◽  
Matter Content ◽  
Nutrient Digestibility ◽  
Dry Matter Intake ◽  
Dry Matter Content ◽  
Average Loss ◽  
Lower Water Content ◽  
Practical Implications

SUMMARYTwo changeover experiments, each on eight buffalo heifers, were conducted in two different years to determine the effect of wilting lucerne herbage (Exps. 1 and 2) and berseem herbage (Exp. 2 only) on voluntary dry-matter intake. The dry-matter content of the herbages increased by field wilting from 27 to 50 and from 26 to 44% for lucerne in Exps. 1 and 2 respectively, and from 21 to 31% for berseem. The drymatter intake, nutrient digestibility coefficients, nutritive value index and retention time of undigested residues were determined for each fresh and wilted herbage.Wilting increased the dry-matter intake of lucerne from 2·3 to 2·8 and from 2·1 to 3·5 kg per 100 kg body weight in Exps. 1 and 2 respectively. Berseem dry-matter intake was increased from 2·2 to 3·1 kg per 100 kg body weight. Digestibility coefficients of all nutrients of both herbages increased by 6–20%. Retention times were unaffected by wilting. The nutritive value indices for lucerne and berseem in Exp. 2 increased by 160 and 60% respectively. In Exp. 2, the average loss of herbage dry matter due to wilting was 3·8%. The higher consumption of the wilted herbages is ascribed to their lower water content. The practical implications of these results are discussed.

The effect of level of concentrate supplementation given with grass silage during the winter on the total lactation performance of autumn-calving dairy cows

1984 ◽  
Vol 102 (1) ◽  
pp. 163-179 ◽  
Author(s):  
F. J. Gordon
Keyword(s):  
Dry Matter ◽  
Matter Content ◽  
Winter Period ◽  
Dry Matter Content ◽  
Single Group ◽  
Lactation Performance ◽  
Linear Effect ◽  
Concentrate Supplementation ◽  
Grass Silage ◽  
Digestible Organic Matter

SummaryA total of 140 British Friesian cows in their second or later lactation and with a mean calving date of 27 October (s.D. 18 days) were used in a randomized-block experiment over a 3-year period. The experiment was designed to examine the effects of level of concentrate given during the winter period, in addition to ad libitum access to grass silage, on total lactation performance. The silage had a mean dry-matter content and digestible organic matter in the dry matter of 206 and 698 g/kg respectively and the mean inputs of concentrates on the five treatments were 0–64, 0–89, 1–14, 1–38 and 1·59 t/cow (treatments 1–5 respectively). Sixteen replicates per treatment were housed in individual stalls during the winter period in order to facilitate the measurement of silage intake and the remaining animals in each year were maintained as a single group.All animals in each year grazed together as a single group at pasture at a mean stocking rate of 6–0 cows/ha and without supplementary concentrates.Level of concentrate supplementation had a significant linear effect on the intake of silage dry matter with the relationship between total intake of silage dry matter over the winter period (kg, y) and concentrate dry matter input (kg, x) being described by equation (1)

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