Statistical research on the fate of dietary mineral elements in dry and lactating cows III. Phosphorus

1969 ◽  
Vol 73 (2) ◽  
pp. 215-222 ◽  
Author(s):  
F. Lomba ◽  
R. Paquay ◽  
V. Bienfet ◽  
A. Lousse
Keyword(s):  
Milk Production ◽  
Mineral Elements ◽  
Statistical Research ◽  
Experimental Conditions ◽  
Phosphorus Balance ◽  
Lactating Cows ◽  
Daily Milk Production ◽  
The Many ◽  
Phosphorus Requirements ◽  
Phosphorus Losses

SUMMARYStatistical analyses were carried out on the data obtained under very strict conditions in metabolism stalls with 41 different rations fed to 127 adult non-pregnant dry cows and with 14 other different rations fed to 35 adult non-pregnant lactating cows that had calved 2–6 months earlier and whose daily milk production ranged from 11 to 20 kg.The correlations between faecal and urinary phosphorus losses, phosphorus in milk, digestible phosphorus and phosphorus balance and the other nutritive factors of the 55 above-mentioned experimental diets have been calculated.In dry and lactating cows, with very variable intakes of phosphorus, phosphorus faecal and urinary losses show very wide variations and may be important. They are not influenced by phosphorus intake, and are related, among the many other nutritional factors we analysed only to ingested water and to a lesser extent to the nitrogen of the diet.The phosphorus balance is thus also very much variable and not really related to the composition of the ration.This low influence of the diet on the apparent fate of phosphorus can be explained by the interference of unpredictable but certainly quite variable endogenous phosphorus excretion, which is also probably responsible for the effect we found of individual factors and of the previous nutritional status.In the lactating cows, the phosphorus requirements for milk production influence the utilization of phosphorus since a significant correlation exists between phosphorus secreted in the milk and urinary phosphorus.In our experimental conditions, the Ca: P ratio does not seem to influence the fate of dietary calcium and phosphorus.

Statistical research on the fate of dietary mineral elements in dry and lactating cows IV. Chloride

1969 ◽  
Vol 73 (2) ◽  
pp. 223-229 ◽  
Author(s):  
R. Paquay ◽  
F. Lomba ◽  
A. Lousse ◽  
V. Bienfet
Keyword(s):  
Milk Production ◽  
Dry Matter ◽  
Mineral Elements ◽  
Statistical Research ◽  
Lactating Cows ◽  
Chloride Excretion ◽  
Daily Milk Production ◽  
Very High ◽  
Matter Energy ◽  
Daily Milk

SUMMARYStatistical analyses were carried out on the data obtained under very strict conditions in metabolism stalls with 41 different rations fed to 127 adult non-pregnant dry cows, and with 14 other different rations fed to 35 adult non-pregnant lactating cows that had calved 2–6 months earlier and whose daily milk production ranged from 11 to 20 kg.The authors have calculated and studied the correlations between faecal and urinary losses of chloride, chloride excretion with the milk, digestible chloride and chloride balance and many other nutritive factors which were analysed for each of the 55 above mentioned experimental diets.The results show that the digestion and utilization of chloride is not influenced by the amount of ingested chloride at the time of the trial. The digestion is generally very high, negatively correlated with dry matter, energy, and pentosans intakes, and positively with nitrogen and potassium intakes. But the most important factor in the fate of dietary chloride seems to be the necessity for the cow to eliminate most of the time high amounts of potassium in the urines.

Statistical research on the fate of dietary mineral elements in dry and lactating cows: I. Calcium

1968 ◽  
Vol 71 (2) ◽  
pp. 173-180 ◽  
Author(s):  
R. Paquay ◽  
F. Lomba ◽  
A. Lousse ◽  
V. Bienfet
Keyword(s):  
Urinary Excretion ◽  
Milk Production ◽  
Mineral Elements ◽  
Urinary Calcium ◽  
Calcium Excretion ◽  
Calcium Balance ◽  
Statistical Research ◽  
Lactating Cows ◽  
Daily Milk Production ◽  
Daily Milk

SUMMARYStatistical analyses were carried out on the data obtained under strictly controlled conditions in metabolism stalls with 41 different rations fed to 127 adult non-pregnant dry cows, and with 14 other different rations fed to 35 adult non-pregnant lactating cows that had calved 2–6 months earlier and whose daily milk production ranged from 11 to 20 kg. The authors have calculated and studied the correlations between faecal and urinary calcium losses, calcium excretion in the milk, digestible calcium, and calcium balance, and the 75 other nutritive factors which were analysed for each of the 55 above-mentioned experimental diets. The results showed that calcium metabolism is regulated in the digestive tract, and the fact that the lactation calcium requirements increase at the same time as the amounts of digestible calcium and the calcium balance corroborates this statement. But except for this endogenous factor of resorption, the fate of the dietary calcium does not depend on the ingested amounts but on the nature itself of the components of the diets and their proportions in the diets. Cereals, and especially barley, have from this point of view a particular beneficial effect. These factors act on the absorption of calcium and thus directly on the balance, since the daily urinary excretion of calcium is generally small and independent. It has also been demonstrated that the balance is not inevitably negative in cows with a daily milk production of 11–20kg, and that a careful composition of the rations should enable one to equilibrate it.The other nutritive factors do not work on calcium utilization, but a close parallel exists between digestibility, urinary excretion and balance of both calcium and magnesium.

Statistical research on the fate of dietary mineral elements in dry and lactating cows: II. Magnesium

1968 ◽  
Vol 71 (2) ◽  
pp. 181-188 ◽  
Author(s):  
F. Lomba ◽  
R. Paquay ◽  
V. Bienfet ◽  
A. Lousse
Keyword(s):  
Milk Production ◽  
Calcium Intake ◽  
Dry Matter ◽  
Opposite Effect ◽  
Mineral Elements ◽  
The Other ◽  
Statistical Research ◽  
Lactating Cows ◽  
Daily Milk Production ◽  
Daily Milk

SUMMARYStatistical analyses were carried out on the data obtained under very strict conditions in metabolism stalls with 41 different rations fed to 127 adult non-pregnant dry cows, and with 14 other different rations fed to 35 adult non-pregnant lactating cows that had calved 2 to 6 months earlier and whose daily milk production ranged from 11 to 20 kg.The correlation between faecal and urinary losses of magnesium, magnesium in milk, digestible magnesium, and magnesium balance and the other nutritive factors of the 55 above-mentioned experimental diets have been calculated.The magnesium absorption is enhanced by increasing magnesium and calcium intake, while nitrogen and, to a lesser extent, fat, giving higher faecal losses, have an opposite effect. There is no influence at this level of lactating requirements.The urinary losses of magnesium are not related to the magnesium intake and digestibility, and the balance is thus directly proportional to the digestible amounts. But this balance is decreased when the diet contains more dry matter or energy, to the benefit of urine in dry cows. We were not able to determine whether this balance reduction also benefits the milk production in the lactating cows.Our results demonstrate that the faecal endogenous losses of magnesium can be highly variable.The balance of magnesium is frequently but not inevitably negative in cows with a daily milk production of 11–20 kg.

Statistical research on the fate of dietary mineral elements in dry and lactating cows

1969 ◽  
Vol 73 (3) ◽  
pp. 453-458 ◽  
Author(s):  
F. Lomba ◽  
R. Paquay ◽  
V. Bienfet ◽  
A. Lousse
Keyword(s):  
Milk Production ◽  
Dry Matter ◽  
Sodium Intake ◽  
Sodium Content ◽  
Mineral Elements ◽  
Dietary Sodium ◽  
Sodium Balance ◽  
Statistical Research ◽  
Experimental Conditions ◽  
Lactating Cows

SUMMARYStatistical analyses were carried out on the data obtained under strictly controlled conditions in metabolism stalls with 41 different rations fed to 127 adult non-pregnant dry cows, and with 14 other different rations fed to 35 adult non-pregnant lactating cows that had calved 2–6 months earlier and whose daily milk production ranged from 11 to 20 kg.The authors have calculated and studied the correlations between faecal and urinary sodium losses, sodium excretion in the milk, digestible sodium and sodium balance and the 75 other nutritive factors which were analysedfor each of the 55 above mentioned experimental diets.The most important factor in the fate of sodium is the amount of dietary sodium. Sodium digestibility is neither total nor constant: faecal losses and digestible amounts are enhanced when sodium intake is increased and faecal losses are also positively correlated with dry matter and nitrogen intakes. An increase in digestible sodium benefits both urinary excretion and balance, the latter being reduced by an increase in dry matter and nitrogen intake.Sodium balance is always negative when sodium content of the diet is lower than 0.1% in the dry cows and 0.2% in the lactating cows. In our experimental conditions, the sodium requirements for milk production do not influence sodium digestibility, but are met above all to the detriment of urinary losses.

Statistical research on the fate of dietary mineral elements in dry and lactating cows V. Potassium

1969 ◽  
Vol 73 (3) ◽  
pp. 445-452 ◽  
Author(s):  
R. Paquay ◽  
F. Lomba ◽  
A. Lousse ◽  
V. Bienfet
Keyword(s):  
Dry Matter ◽  
Close Correlation ◽  
Mineral Elements ◽  
Potassium Excretion ◽  
Statistical Research ◽  
Potassium Balance ◽  
Lactating Cows ◽  
Dietary Potassium ◽  
Urinary Potassium ◽  
Daily Milk Production

SummaryStatistical analyses were carried out on the data obtained under strictly controlled conditions in metabolism stalls with 41 different rations fed to 127 adult non-pregnant dry cows, and with 14 other different rations fed to 35 adult non-pregnant lactating cows that had calved 2–6 months earlier and whose daily milk production ranged from 11 to 20 kg.The authors have calculated and studied the correlations between faecal and urinary potassium losses, potassium excretion in the milk, digestible potassium and potassium balance, and the 75 other nutritive factors which were analysed for each of the 55 above mentioned experimental diets.The results show that three nutritional factors, potassium, dry-matter and nitrogen intakes, influence the fate of dietary potassium. The apparent digestibility of potassium is hyperbolically related to potassium content of the diet since the true digestibility of potassium is very high, unrelated to potassium intake and rather constant and since about 2·2 g of endogenous potassium are excreted in the faeces per kg of ingested dry matter.The quantities of digestible potassium strongly influence both the potassium urinary outputs and potassium balance. An increase in digestible dry matter enhances too the urinary potassium excretion as well as faecal output and lower potassium balance twice as much.But the most interesting feature in the potassium metabolism is that at any level, ingestion, digestion, excretion, there is a very close correlation between potassium and nitrogen.

scholarly journals Interkorelasi antara persentase konsentrat, kadar urea nitrogen susu dan beberapa variabel sapi perah Friesian Holstein

2020 ◽  
Vol 9 (2) ◽  
pp. 53
Author(s):  
Syaiful Rizal ◽  
Suzanita Utama ◽  
Budi Utomo ◽  
Suherni Susilowati ◽  
Sri Mulyati ◽  
...  
Keyword(s):  
Milk Production ◽  
Strong Correlation ◽  
Body Condition Score ◽  
Urea Nitrogen ◽  
Lactating Cows ◽  
Holstein Friesian ◽  
Condition Score ◽  
Negative Effect ◽  
Milk Urea ◽  
Daily Milk Production

The purpose of this study was to identify the correlation among the percentage of feed concentrate, milk urea nitrogen (MUN), milk production, services per conception (S/C), calving interval (CI), and days open (DO) of Holstein Friesian cows on smallholder farms. Twenty four, 4-6 year old, non-pregnant, lactating cows, with body condition score (BCS) 5-7, having given birth 2-5 times were recorded their daily milk production, S/C, CI, DO, and the percentage of concentrate in feed given. Milk samples were collected to measure MUN. The correlation calculation among the six variables resulted 15 correlation values, ten of which were not significantly different (p >0.05), including the correlation between the percentage of concentrate and milk production on MUN. The other five correlation values were significantly different (p <0.05). The increase in concentrate intake was moderately correlated (r = 0.52), affecting 27.04% of the increase in milk production, and weakly correlated (r = 0.39), affecting 15.21% of the increase in S/C. The increase in milk production had a very strong correlation (r = 0.82), affecting 67.24% of the increase in S/C. The increase in S/C had a strong correlation (r = 0.61), affecting 37.21% of the increase in CI. The increase in CI was also affected 38.44% by the increase in milk production with a strong correlation (r = 0.62). It could be concluded that dairy cows with higher feed concentrate intake would be followed by an increase in milk production, but had a negative effect on reproduction in the form of increased S/C and CI.

The effects of the protein content of the diet on the performance of lactating cows

1973 ◽  
Vol 40 (1) ◽  
pp. 93-103 ◽  
Author(s):  
R. Paquay ◽  
J. M. Godeau ◽  
R. De Baere ◽  
A. Lousse
Keyword(s):  
Protein Content ◽  
Milk Production ◽  
Crude Protein ◽  
Milk Composition ◽  
Crude Protein Content ◽  
Lactating Cows ◽  
Stage Of Lactation ◽  
Daily Milk Production ◽  
D 12 ◽  
Limiting Value

SummaryFour experiments were carried out with Friesian cows in different stages of lactation to determine the influence of the crude-protein content of the diet on the digestibility and utilization of dietary constituents and on the cow's performance and milk composition.The rations were composed so that they met the energy requirements of the cows, but crude-protein content was widely variable.Our findings on the digestibility of the dietary constituents were in agreement with the data given in the literature.The utilization of dietary N for milk secretion was influenced by the level of N intake only when the crude-protein content of the diet was lower than a limiting value, which varied according to stage of lactation. When this value was not attained the daily milk production was affected, but not the protein content of the milk.The optimal crude-protein content of the diet was 15–16% (dry-matter basis) when milk production exceeded 20 kg/d, 12–13% for a production of 15–17 kg/d and 11–12% for cows giving less than 10 kg of milk daily.

Association of production factors with milk IgA and IgM concentrations in normal lactating cows

2010 ◽  
Vol 77 (4) ◽  
pp. 481-486 ◽  
Author(s):  
Shengguo Zhao ◽  
Chungang Zhang ◽  
Jiaqi Wang ◽  
Dengpan Bu ◽  
Guanglei Liu ◽  
...  
Keyword(s):  
Somatic Cell ◽  
Milk Production ◽  
Milk Composition ◽  
Lactating Cows ◽  
Stage Of Lactation ◽  
Production Factors ◽  
Lactation Stage ◽  
Chinese Holstein Cows ◽  
Daily Milk Production ◽  
Daily Milk

Concentrations of IgA and IgM in milk from normal lactating cows were measured to determine whether they were affected by lactation number, lactation stage, daily milk production, milk composition and somatic cell score (SCS). A total of 284 Chinese Holstein cows showing no signs of mastitis were selected from more than 1600 cows from one farm. Concentrations of IgA and IgM in normal milk were determined by ELISA. Results revealed that average milk IgA and IgM concentrations were 235±11 and 32±3 μg/ml, respectively. IgA and IgM concentrations in milk were found to have an association with lactation number, stage of lactation, daily milk production and SCS. Both SCS and daily milk production were found to be strong significant (P<0·01) direct factors correlating to IgA concentration. Stage of lactation and SCS were found to be strong significant (P<0·01) direct factors correlating to IgM concentration.

Calcium digestibility in cows as influenced by the excess of alkaline ions over stable acid ions in their diets

1978 ◽  
Vol 39 (3) ◽  
pp. 425-429 ◽  
Author(s):  
F. Lomba ◽  
G. Chauvaux ◽  
E. Teller ◽  
L. Lengele ◽  
V. Bienfet
Keyword(s):  
Milk Production ◽  
Statistical Analyses ◽  
Lactating Cows ◽  
Controlled Conditions ◽  
Daily Milk Production ◽  
Sodium And Potassium ◽  
Daily Milk

1. Statistical analyses were carried out on results obtained under strictly-controlled conditions in metabolism stalls with forty-one different rations fed to 127 adult non-pregnant dry cows, and with fourteen other different rations fed to thirty-five adult non-pregnant lactating cows that had calved 2–6 months earlier and whose daily milk production ranged from 11 to 20 kg.2. Correlations between calcium digestibility and values for the sum of the alkaline ions sodium and potassium minus the sum of the stable acid ions chloride, sulphate and phosphate were calculated for all fifty-five experimental diets.3. The results showed that the excess of the anions over the cations, in rations maintaining a positive Ca balance but not in rations allowing a negative Ca balance, increases the absorption of Ca from the intestine. Phosphorus, not alone but with chloride and sulphate, is the most important component of this effect.

EVALUATION OF CORN AND SORGHUM-SUDAN SILAGES ON THE BASIS OF DRY MATTER INTAKE, DIGESTIBILITY AND MILK PRODUCTION

1968 ◽  
Vol 48 (3) ◽  
pp. 431-435
Author(s):  
L. J. Fisher
Keyword(s):  
Milk Production ◽  
Dry Matter ◽  
Energy Content ◽  
Rumen Fluid ◽  
Total Body Weight ◽  
Protein Digestibility ◽  
Corn Silage ◽  
Dry Matter Intake ◽  
Lactating Cows ◽  
Daily Milk Production

Sorghum-sudan (S-S) silage and corn silage were compared on the basis of dry matter intake and milk production when fed to lactating cows and on the basis of digestibility when fed to wether Iambs. Although dry matter percent was lower for the S-S silage, 21.5 vs. 27.4, average daily dry matter intake was nearly the same, 63.4 vs. 64.4 g/kg W0.75 when compared with corn silage. Average daily milk production and total body weight change were significantly less (P < 0.05), 218.7 vs. 234.4 g/kg W0.75 and − 7.0 vs. + 10.7 kg, respectively, for cows fed S-S silage. Rumen fluid from cows fed corn silage contained a significantly lower molar percent acetic acid and higher butyric acid (P < 0.01) than rumen fluid from cows fed S-S silage. Digestibility coefficients were greater (P < 0.01) for corn silage dry matter, nitrogen-free extract, fiber and energy, but significantly less for protein (P < 0.01) when compared with S-S silage. The high nitrogen content and protein digestibility suggest that sorghum-sudan hybrids may be usefully employed in ruminant rations, although they are low in digestible energy content when compared with corn.

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