共查询到20条相似文献，搜索用时 781 毫秒
1.
One young male and five female goats aged from four months to mature fullmouthed were handled by stroking and raising the jugular vein intermittently for one minute each day for four days. A control group was kept in a similar pen out of sight of the test group for the four days and approached only when attended for pen cleaning and feeding. On the fifth day, heparinised blood samples were taken once hourly for a period of three hours by jugular venepuncture from both groups. After processing, the samples were examined for packed cell volumes, plasma and erythrocyte potassium and sodium concentrations. Analysis of variance of the data showed a significant (P<0.01) reduction in erythrocyte potassium concentration in the unhandled group (76.3 mmol/l to 74.2 mmol/l) from Time 0 to Time 1, and a similarly significant increase in levels in the handled group (73.7 mmol/l to 78.0 mmol/l) from Time 0 to Time 1. There was also a significant difference (P<0.05) in packed cell volumes between the unhandled and handled groups at Time 0 and Time 1 (28.6% v 25.2% and 27.6% v 25.0% respectively). There were no significant differences between the two groups in plasma sodium, plasma potassium or erythrocyte sodium. 相似文献
2.
Twenty three non pregnant, non lactating aged Merino and Border Leicester ewes were subject to four jugular venipunctures one hour apart (times 0, 1, 2 and 3). Four different delay intervals of 12.5, 64.0, 128.0 and 252.9 seconds between catching and sampling (delays 1, 2, 3 and 4) were used on each sheep in a random manner. Estimates were made of packed cell volumes (PCVs), plasma and erythrocyte sodium and potassium concentrations. The mean PCV at time 0 of 35.4 per cent was significantly higher than the levels of 33.1, 31.8 and 32.2 per cent at times 1, 2 and 3 respectively. There was no significant difference between the means at times 1, 2 and 3. The mean plasma potassium concentrations at time 0 of 4.37 mmol/l was significantly higher than the levels of 4.16 and 4.14 mmol/l at times 1 and 3 respectively. Delays had no significant effects on the means of any of the parameters studied. The findings strongly suggest that sheep become excited by initial handling but not by subsequent venipunctures and that a delay between catching and sampling of between 12.5 and 252.9 second has no effect on the blood constituents studied. 相似文献
3.
Fenwick D. C. Blackshaw Judith K. Green Deborah J. 《Veterinary research communications》1986,10(1):309-315
Twenty three non pregnant, non lactating aged Merino and Border Leicester ewes were subject to four jugular venipunctures one hour apart (times 0, 1, 2 and 3). Four different delay intervals of 12.5, 64.0, 128.0 and 252.9 seconds between catching and sampling (delays 1, 2, 3 and 4) were used on each sheep in a random manner. Estimates were made of packed cell volumes (PCVs), plasma and erythrocyte sodium and potassium concentrations. The mean PCV at time 0 of 35.4 per cent was significantly higher than the levels of 33.1, 31.8 and 32.2 per cent at times 1, 2 and 3 respectively. There was no significant difference between the means at times 1, 2 and 3. The mean plasma potassium concentrations at time 0 of 4.37 mmol/l was significantly higher than the levels of 4.16 and 4.14 mmol/l at times 1 and 3 respectively. Delays had no significant effects on the means of any of the parameters studied. The findings strongly suggest that sheep become excited by initial handling but not by subsequent venipunctures and that a delay between catching and sampling of between 12.5 and 252.9 second has no effect on the blood constituents studied. 相似文献
4.
D C Fenwick 《Australian veterinary journal》1990,67(3):102-104
The association between the concentrations of various blood constituents and the responses of cows with milk fever following calcium borogluconate therapy was determined using analysis of variance. In cows which had not received herdsman treatment prior to sampling (n = 63), plasma potassium was the only constituent with a significant effect (p less than 0.01), the mean concentrations for cows classified as unassisted, assisted, or delayed, recoveries, and deaths ranging down from 4.3 to 2.8 mmol/l, respectively. In cows which had received treatment prior to sampling (n = 55) those making unassisted recoveries had significantly lower mean concentrations of serum total calcium than those making assisted recoveries (1.3 v 1.9 mmol/l, respectively, p less than 0.05), and cows making delayed recoveries had significantly lower mean plasma inorganic phosphate concentrations (0.3 mmol/l) than those making unassisted and assisted recoveries (both 0.7 mmol/l, p less than 0.05) and those subsequently dying (1.2 mmol/l, p less than 0.01). Response was not dependent on plasma potassium concentrations in the treated group of cows, and plasma sodium, serum magnesium, and erythrocyte sodium concentrations were not significant in either group of cows. 相似文献
5.
DC FENWICK 《Australian veterinary journal》1988,65(12):374-375
In one study, a comparison was made of the concentrations and ratios of certain blood cations in 2 groups of cows with milk fever, one showing normal consciousness (n = 8) and the other depressed consciousness (n = 24). There were no significant differences in the mean concentrations of serum total calcium, plasma inorganic phosphorus and potassium, erythrocyte sodium and potassium, the serum calcium/serum magnesium ratio or the plasma sodium/erythrocyte sodium ratio. There were significant differences (all P less than 0.05) in the mean (+/- SD) concentrations of serum magnesium and plasma sodium concentrations, and the plasma sodium/serum magnesium ratio of 0.8 +/- 0.28 vs 1.2 +/- 0.37 mmol/l, 155 +/- 3.0 vs 147 +/- 6.4 mmol/l and 180 +/- 40.1 vs 116 +/- 34.1 for normal vs depressed cows, respectively. In a second study, a comparison was made of the concentrations and ratios of the same blood cations in 3 groups of cows in different positions when attended for milk fever, namely standing (n = 6), sternal recumbency (n = 24) and lateral recumbency (n = 31). There were no significant differences between the mean concentrations or ratios of any of the cations. 相似文献
6.
Approximately 80 farmed male and female red deer aged three months and over were blood sampled and biochemical parameters measured. The deer were sampled by jugular venepuncture without tranquillization. Mean values recorded were serum gamma-glutamyltransferase (19.5 IU/l), glutamic oxaloacetic transaminase (43.0 IU/l), creatine phosphokinase (197.9 IU/l), plasma pepsinogen (0.91 IU/i), blood urea nitrogen (8.56 mmol/l), serum glucose (6.9 mmol/l), phosphorus (1.75 mmol/l), calcium (2.13 mmol/l), magnesium (0.74 mmol/l), potassium (4.43 mmol/l) and sodium (138.5 mmol/l). There were no significant differences in any parameter between sexes or between age groups 3-8 months, 9-18 months, or older. 相似文献
7.
R. J. ROSE R. J. CARTER JAN E. ILKIW 《Journal of veterinary pharmacology and therapeutics》1980,3(2):111-119
Six dogs with previously implanted arterial, central venous, pulmonary arterial and left atrial catheters received halothane anaesthesia, and halothane anaesthesia plus administration of a balanced electrolyte solution given over one hour, in a cross-over experiment. Parameters measured included temperature, heart rate (HR), respiratory rate (f), arterial and mixed venous blood-gases and acid-base parameters, mean arterial pressure ( AP ), mean pulmonary artery pressure ( PAP ), mean left atrial pressure ( LAP ), mean central venous pressure ( CVP ), packed cell volume (PCV), total plasma protein (TPP), plasma sodium, potassium and chloride concentrations, and urinary sodium and potassium concentrations.
During halothane anaesthesia there were significant decreases in AP , PCV, TPP, f, and significant increases in arterial and mixed venous oxygen, and glucose concentrations, when compared with conscious control values. When intravenous fluid was administered during anaesthesia, there were significant decreases in temperature, AP , PCV and TPP, with significant increases in PAP , CVP and f, when compared with values during anaesthesia alone. After one hour recovery period from anaesthesia, dogs receiving intravenous fluids had significantly decreased PaO2 values and significantly increased pH when compared with anaesthesia alone. There was an average urinary excretion of 7 mmol of sodium and 5 mmol of potassium during anaesthesia, and 36 mmol of sodium and 8 mmol potassium during fluid administration. 相似文献
During halothane anaesthesia there were significant decreases in AP , PCV, TPP, f, and significant increases in arterial and mixed venous oxygen, and glucose concentrations, when compared with conscious control values. When intravenous fluid was administered during anaesthesia, there were significant decreases in temperature, AP , PCV and TPP, with significant increases in PAP , CVP and f, when compared with values during anaesthesia alone. After one hour recovery period from anaesthesia, dogs receiving intravenous fluids had significantly decreased PaO
8.
Blood and urine samples of 180 dairy cows from 12 herds were examined. Sodium and potassium concentrations were determined in erythrocytes, whole blood, plasma, urine, and glucose concentration in blood: the interrelations were compared. Sodium and potassium concentrations in erythrocytes were 85.15 +/- 11.45 mmol/l, and 25.93 +/- 7.81 mmol/l, respectively. A statistically significant relation was found between sodium and potassium concentrations in erythrocytes (r = 0.3467+++) and the content of electrolyte in blood cells and in whole blood (Na: r = 0.5336+++; K: r = 0.3561+++). No statistically significant relation of intraerythrocyte concentration of both electrolytes was confirmed with respect to the other characteristics (sodium and potassium concentrations in plasma and urine, and glucose concentration in blood). In the conditions of routine laboratory diagnostics in clinically healthy cows, determinations of intraerythrocyte sodium and potassium do not broaden possibilities of evaluating the metabolic state of these electrolytes and cannot be used as the characteristics of energy insufficiency. The cannot replace the analyses performed in serum and urine. 相似文献
9.
Yamato O Lee KW Chang HS Tajima M Maede Y 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》1999,61(10):1179-1182
The concentrations of sodium, potassium, reduced glutathione (GSH) and free amino acids and Na-K-ATPase activity in erythrocytes were examined in 35 purebred Jindo dogs in Korea. The incidence of Jindo dogs with a high potassium concentration and high activity of Na-K-ATPase in erythrocytes (HK phenotype) was 25.7%. The erythrocyte GSH concentration in HK Jindo dogs varied widely, from 2.45 to 12.38 mmol/l of RBCs, and was positively correlated with the erythrocyte glutamate concentration. These results indicate that HK Jindo dogs have normal to very high levels of erythrocyte GSH, which might result from the varying quantity of Na-dependent glutamate influx in the erythrocytes. 相似文献
10.
Michelini F Eicher R Tschudi P Martig J 《DTW. Deutsche tier?rztliche Wochenschrift》1999,106(1):18-21
Serum and urine were taken from healthy dairy cattle from 22 different farms. 214 animals belonged to the Swiss Brown breed and 210 were crossbreds of Simmental-Red Holstein. The animals were given at least 70 g of sodium chloride with their daily feed ration. On 6 farms sodium chloride was offered ad libitum in form of licks, which was presumed to be sufficient for covering their needs. Concentrations of sodium (UR Na), potassium (UR K) and creatinine were analyzed from serum and urine and fractional excretion of Na and K was calculated. Concentrations of sodium and potassium in urine from all cows (mean +/- sd) was 60.9 +/- 44.7 mmol/l and 370.7 +/- 66.9 mmol/l respectively. The FE values were 0.954 +/- 0.939% for sodium and 173.1 +/- 54% for potassium. In 5.5% of the animals values for UR Na < 10 mmol/l were found. There were no significant differences, however, were found in sodium and potassium excretion among farms. Urine samples of at least 10 animals should be analyzed in order to have a reliable estimation of the supply with sodium chloride within a herd. Our results do not support the hypothesis that low sodium excretion would be a predisposing factor for Bovine Dilative Cardiomyopathy in Simmental-Red Holstein cattle. 相似文献
11.
药物对球虫感染鸡血液及生化指标的影响 总被引：8，自引：1，他引：8
1日龄艾维因肉鸡分为 4个组 ,即中药组、马杜霉素组、感染不给药组和不感染不给药组 ,每组 2 0只。中药组从 1日龄开始即投喂含 0 .1%中草药复方制剂 (由绞股蓝皂甙、去油鸦胆子仁等组成 )的饲料 ;马杜霉素组从 12日龄起投喂含马杜霉素 5 mg/ kg的饲料。前 3组于 14日龄感染鸡柔嫩艾美耳球虫孢子化卵囊。卵囊攻击前及攻击后 4、7d分别采血 ,测定血液红细胞数、血钾、血钠、血磷、血清白蛋白和血清总蛋白含量。结果表明 ,卵囊攻击后 4、7d,感染不给药组的红细胞数显著低于其他各组 (P<0 .0 5 ) ,卵囊攻击后 7d,血钾浓度显著高于其他各组 (P<0 .0 5 ) ,血清白蛋白和血清总蛋白显著低于其他各组 (P<0 .0 5 ) ;卵囊攻击后 7d,中药组血液红细胞数显著低于不感染不给药组 (P<0 .0 5 ) ,但显著高于感染不给药组 (P<0 .0 5 ) ;马杜霉素组的各项测定指标与不感染不给药组相比无显著差异 (P>0 .0 5 ) ;卵囊攻击后 ,各组间的血磷和血糖值无显著差异 (P>0 .0 5 )。结果提示 ,药物能抵抗球虫感染 ,血液各项指标得以保持相对恒定。 相似文献
12.
Approximately 100 farmed male and female red deer aged three months and over were blood-sampled and haematological parameters were measured. The deer were sampled by jugular venepuncture without tranquilization. Mean values were haemoglobin (16.0 g/dl), packed cell volume (44.6%), mean corpuscular haemoglobin concentration (35.8 g/dl), total plasma protein (66.0 g/l). fibrinogen (4.8 g/l) and white blood-cell numbers (5.80 x 10(9)/l). Differential white blood-cell counts were neutrophils (53.9%), eosinophils (4.8%), basophils (3.0%), lymphocytes (37.2%) and monocytes (1.1%). There were no significant differences in any parameter measured between sexes or between age groups three to eight months, nine to eighteen months, or older. 相似文献
13.
Approximately 100 farmed male and female red deer aged three months and over were blood-sampled and haematological parameters were measured. The deer were sampled by jugular venepuncture without tranquillization. Mean values were haemoglobin (16.0g/dl), packed cell volume (44.6%), mean corpuscular haemoglobin concentration (35.8g/dl), total plasma protein (66.0g/l). fibrinogen (4.8g/l) and white blood-cell numbers (5.80 x 109/l). Differential white blood-cell counts were neutrophils (53.9%), eosinophils (4.8%), basophils (3.0%), lymphocytes (37.2%) and monocytes (1.1%). There were no significant differences in any parameter measured between sexes or between age groups three to eight months, nine to eighteen months, or older. 相似文献
14.
J F Freestone G P Carlson D R Harrold G Church 《American journal of veterinary research》1988,49(11):1899-1902
Alterations in electrolyte and acid-base balance were studied in 6 horses for 8 hours after furosemide administration (1 mg/kg of body weight, IM), and the results were compared with those for 5 healthy untreated horses (controls) kept under identical environmental conditions. In the treated group, decreases in plasma potassium, chloride, and calcium concentrations and increases in total plasma protein content persisted for the 8-hour observation period, whereas there was no change in plasma sodium concentration, osmolality, or packed cell volume. Plasma bicarbonate concentration and PCO2 remained high throughout the study, during which time venous blood pH was modestly increased only at the 6-hour sampling time. Furosemide treatment resulted in decreases in urine pH, specific gravity, osmolality, and potassium and calcium concentrations and increases in urine volume and total urine sodium, chloride, and calcium excretion. Body weight decreased 19.2 +/- 5.2 kg (mean +/- SD) in treated horses (4 +/- 1% of body weight), compared with a weight loss of 8 +/- 2.1 kg in untreated horses (1.5 +/- 0.4% of body weight) during the 8-hour experimental period. The increased fluid losses induced by the diuretic did not cause any obvious clinical signs in the horses. Pulse pressure, skin turgor, capillary refill time, and jugular distensibility remained unchanged throughout the experimental period. 相似文献
15.
A Steinbrecher R Fuchs E Kolb K Nestler C Schineff U Schmidt M Wahren 《Archiv fuer experimentelle veterinaermedizin》1990,44(3):367-381
4 horses (Group A) received an oat-hay ration, through 9 months running, while 3 horses (Group B) were fed a barley-hay ration over the same period of time. Blood samples were collected and examined in 4-week intervals. All values considered, no differences were found to exist between the 2 groups with regard to Hb and haematocrit in blood as well as to protein, glucose, sodium, potassium, magnesium, iron fixation capacity, copper, and zinc in blood plasma. The urea level in plasma of Group A was higher than that in Group B, values being 5.76 +/- 0.64 mmol/l and 5.14 +/- 0.72 mmol/l. The same applied to free fatty acids, values being 150 +/- 83 mumols/l in Group A and 95 +/- 42 mumols/l in Group B. Calcium was 3.10 +/- 0.27 mmol/l in Group A and 2.92 +/- 0.26 mmol/l in Group B, while the A-B difference in inorganic phosphorus amounted to 1.62 +/- 0.65 against 1.99 +/- 0.77 mmol/l. Group A was inferior to Group B also with regard to iron in plasma, values being 28.6 +/- 2.42 mumols/l against 32.8 +/- 4.62 mumol/l. Causes underlying these differences are discussed in some detail. 相似文献
16.
D C Fenwick 《The British veterinary journal》1992,148(5):413-423
Five normal, conscious, aged Merino ewes were infused with 200 ml of an aqueous solution containing 5% NaCl and 0.25% KCl (HNaK) at a mean rate of 0.024 ml/kg/s and four similar sheep with 0.9% saline at a mean rate of 0.018 ml/kg/s. Five ECG tracings were obtained over a 6-h period--two (20 s each) before, one (continuous tracing) during the infusion, and two (20 s each) afterwards. The heart was auscultated during the infusion. Seven heparinized blood samples were obtained--three before the infusion (1.5 h, 1.0 h, and immediately before), and four afterwards (immediately, 2.5 h, 4.5 h, and 24 h after). Determinations were made of changes in mean PCV, red cell counts, mean corpuscular volumes, plasma Na, K, Ca and Mg, and of erythrocyte Na and K concentrations. Analysis of variance revealed increases in heart rate when the results from both groups were combined, but no significant effects on cardiac rhythm. Auscultation revealed marked fluctuations in cardiac intensity within individual sheep and marked differences between sheep, particularly in those infused with HNaK. In the HNaK group there were significant increases in erythrocyte and plasma Na, and erythrocyte K and decreases in plasma Ca during the infusion. Plasma K increased from the termination of the infusion to 2.5 h afterwards in the saline group but decreased unexpectedly during the same period in the group infused with HNaK [corrected]. 相似文献
17.
The distribution of potassium and sodium concentrations in the erythrocytes of some breeds of cattle
Arranz JJ Bayón Y Primitivo F 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》1994,111(1-6):228-233
SUMMARY: The distribution of erythrocyte potassium and sodium concentrations was studied in Sayaguesa (n = 150), Brown Swiss (n = 163) and two populations of Avile?a-Negra Ibérica cattle (n = 141 and 141 respectively). No polymorphism was detected for red-cell cation content in any of the breeds investigated. Mean values of potassium concentrations varied between 21.42 and 24.92 mmol/l red cells, those of sodium contents ranging from 77.50-93.44 mmol/1. The cattle studied can thus be considered as belonging to the 'low potassium' (LK) type. Significant differences were found both in potassium and sodium concentrations between one of the populations of Avile?a-Negra Ibérica and the other groups examined. Mean values of sodium levels in Brown Swiss were also significantly different from the other groups. ZUSAMMENFASSUNG: Verteilung von Kalium- und Natriumblutspiegelwerten in Erythrozyten einiger Rinderrassen Die Verteilung von Kalium- und Natriumkonzentrationen in Erythrozyten wurde in vier Gruppen untersucht: Sayaguesa (n = 150), Braunvieh (n = 163) und zwei Gruppen von Avile?a-Negra Ibérica Rindern (n = 141). In keiner der untersuchten Gruppen wurde Polymorphismus für den Cationenspiegel gefunden. Mittelwerte für Kaliumkonzentration schwankten zwischen 21,4 und 24,9 mmol/l roter Zellen, die für Natriumgehalt zwischen 77,5 und 93,4 mmol/1. Die Rinder k?nnten daher als 'niedrigere Kalium' Type bezeichnet werden. Signifikante Unterschiede wurden sowohl für den Kalium-als auch für der Natriumspiegel zwischen den beiden Avile?a-Negra Ibérica Gruppen gefunden. Die Mittelwerte für Natriumspiegel in Braunvieh waren ebenfalls significant unterscniedlich im Vergleich zu den anderen. RESUMEN: Distributión del potasio y sodio eritrocitarios en algunas razas de ganado vacuno Se estudió la distribución de las concentraciones de potasio y sodio eritrocitarios en cuatro grupos de ganado vacuno: Sayaguesa (n = 150), Pardo Alpina (n = 163) y dos poblaciones de Avile?a-Negra Ibérica (n = 141 y n = 141). No se detectó polimorfismo en el contenido eritrocitario de cationes en ninguno de los grupos estudiados. Los valores medios de las concentraciones de potasio oscilaron entre 21.42 y 93.44 mmol/l de glóbulos rojos, mientras que los correspondientes al sodio oscilaron entre 77.50 y 93.44 mmol/l. Por tanto, los animates estudiados pueden considerarse como pertenecientes al tipo 'bajo potasio'. Se encontraron diferencias significativas entre el contenido en potasio y en sodio de una de las poblaciones de Avile?a-Negra Ibérica y el resto de los grupos analizados. Además, los niveles medios de sodio eritrocitario de la raza Pardo-Alpina presentaron diferencias significativas con los demás grupos. 相似文献
18.
互助县杂种黄牛红细胞钾型的研究 总被引：5，自引：0，他引：5
根据青海省互助县４０头杂种黄牛的红细胞钾（ＥＫ）浓度分别为高钾（ＨＫ）和低钾（ＬＫ）两种表型，其中ＬＫ型占３５头（８７．５％）为优势表型。ＬＫ型杂种黄牛的ＥＫ浓度为８．９～３０．１ｍｍｏｌ／Ｌ，ＨＫ型的为４５．８～７５．３ｍｍｏｌ／Ｌ，等位基因频率Ｋ＾ｈ＝０．３５３６，Ｋ＾Ｌ＝０．６４６４。 相似文献
19.
J. F. Freestone BVSc K. Gossett DVM PhD G. P. Carlson DVM PhD G. Church MAp Stat 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》1991,5(1):40-45
Six thoroughbreds were used in each of three trials to examine the effect of potassium depletion on exercise-associated muscle damage. Horses were exercised after a control period (Treatment 1), a 72-hour fast (Treatment 2), and furosemide and sodium bicarbonate (Treatment 3). During the preexercise period, feed withdrawal for 72 hours caused decreases in body weight, plasma sodium, chloride, and serum calcium. There were no changes in plasma potassium, erythrocyte potassium, or serum creatine phosphokinase (CK) activity. Furosemide and sodium bicarbonate administration resulted in a decrease in plasma potassium, chloride, serum calcium, and magnesium in the pre-exercise period. Erythrocyte potassium and serum CK activity were unchanged. Body weight initially decreased following furosemide and sodium bicarbonate and then increased upon access to water. In all three treatment groups plasma sodium, potassium, L-lactate, serum calcium, and magnesium were increased immediately following exercise. There was a significant increase (P less than 0.05) in serum CK activity in the furosemide and sodium bicarbonate-treated horses compared to control and withholding feed treatment groups by 30 minutes following exercise. Erythrocyte potassium was decreased immediately following exercise in the furosemide and sodium bicarbonate group but not in the other treatment groups. Potassium depletion may play a role in exercise-induced muscle damage but could not be implicated as the sole cause of the serum CK activity increase in this study. 相似文献
20.
The bone activity and bone mineral content in rib bones resected from 33 dairy cows between 3 and 8 h after parturition were measured, and the effects upon them of a deficient supply of dietary magnesium (Mg) during the last seven weeks of pregnancy were studied. The cows were fed a diet containing either 0.22% magnesium (low Mg) or 0.82% magnesium (high Mg) in the dry matter (DM), and the potassium content of both rations was increased to approximately 4.1% in the DM to reduce the absorption of magnesium. In the cows fed the low-Mg diet a fall in plasma Mg concentration was observed. In the low-Mg, low-parity cows the plasma Mg concentrations at parturition were higher than in the low-Mg, high-parity cows, i.e. 0.83 mmol/l and 0.54 mmol/l, respectively. After parturition four cows in the low-Mg, high-parity group showed clinical signs of hypocalcaemia but none of the other groups did so. The bone formation in low-parity cows was significantly (P less than 0.05) affected by Mg supply, with higher percentages of both trabecular surface covered by osteoid and osteoid volume in the low-Mg group. In the high-parity cows no significant differences in bone formation were found between the low- and high-Mg groups. An inadequate Mg supply resulted in a significantly (P less than 0.05) higher Ca content in the bone ash of low-parity cows and a significantly (P less than 0.05) higher bone ash percentage in the bone of high-parity cows. 相似文献