فهرست مقالات early lactation

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  1 - Effect of Two Types of Total Mixed Rations on Production Performances of Holstein Friesian Cows in Early Lactation
  B.C. Kalansooriya R.M.A.S. Bandara H.M.G.P. Herath
  The milk production of high producing European dairy cattle breeds in tropical environment is not in satisfaction level. In general, cows develop negative energy balance at the early lactation resulting poor production performances. The aim of the study was to assess th چکیده کامل

  The milk production of high producing European dairy cattle breeds in tropical environment is not in satisfaction level. In general, cows develop negative energy balance at the early lactation resulting poor production performances. The aim of the study was to assess the effect of total mixed ration feeding systems (TMR) over conventional feeding system to increase the production performances of cows in early lactation. Napier (Pennisetum purpureum) based conventional feeding system (CFS) versus two different types of total mixed rations as TMR1 (with the same ingredients and same quantity in CFS) and TMR2 (16% dry matter of napier in TMR1 was replaced with legume and non-legume) were studied on production performances of 15 Holstein Friesian cows in early lactation (n=5). The highest average daily milk yield was observed in TMR2 fed cows (17.88±3.03 L/d) while the lowest was observed in CFS fed cows (12.23±0.88 L/d, p <0.0001). The percentage of average daily weight gain was differed (P=0.01) among the treatments (CFS=1.53%, TMR1=2.79%, and TMR2=4.32%). The body condition score of the cows fed with TMR1 and TMR2 was increased by 0.1 and 0.25, respectively at the end of the experimental period whereas it was unchanged in the cows fed with CFS. Results revealed that feeding of TMR for Holstein Friesian cows in early lactation is a better way to achieve increased milk production with a better body condition in the tropics. TMR consisted of legume and non-legume fodder was more efficient. پرونده مقاله
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  2 - The Effects of Lysophospholipid on Performance, Ruminal Bacteria and Some Blood Parameters in Lactating Holstein Dairy Cows
  M. Movagharnezhad Y. Chashnidel A. Teimouri Yansari M. Gholizadeh
  In order to examine the effects of feeding different levels of lysophospholipid (LPL) on early lactating Holstein cows, 15 cows were assigned in a completely randomized design with three experimental treatments including: 1) control ration; 2 and 3) control ration plus چکیده کامل

  In order to examine the effects of feeding different levels of lysophospholipid (LPL) on early lactating Holstein cows, 15 cows were assigned in a completely randomized design with three experimental treatments including: 1) control ration; 2 and 3) control ration plus 0.1% and 0.15% of dry matter (DM) LPL, respectively. The experiment was conducted for 35 days (14 days for adaptation and 21 days for sample collection). Cows fed twice a day at 7:00 and 16:00 and received total mix ration (TMR). Daily feed intake and milk yield were measured. At the end of the experiment (day 35), the blood samples and rumen liquor were collected from each cow. The supplementation of LPL had no effect on DM intake and digestibility but increased digestibility of fat (P=0.0346). Addition of LPL to the diet slightly improved milk production (P=0.0673). The level of alanine aminotransferase (ALT) enzyme decreased with increasing LPL (P=0.0324) but activity of carboxymethyl cellulase enzyme activity increased (P=0.0421). Increasing LPL in the ration increased the amount of acetate (P=0.0452) and valerate (P=0.0033) produced in the rumen. The LPL significantly increased the population of cellulolytic bacteria (P=0.0386). In general, supplementing the ration of lactating cows with LPL, especially in the early lactation, increased feed efficiency in a dose-response manner, milk production and improved serum parameters, maintains liver health, improved ruminal bacterial population and fermentation parameters, and increased ruminal and hepatic enzymes activity. پرونده مقاله
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  3 - Effects of Supplementing Xylose‐Treated Soybean Meal or Untreated Corn Gluten Meal to Lactating Dairy Cows
  M. Jahani-Moghadam E. Mahjoubi H. Amanlou S. Mohammadi
  This experiment was performed to investigate whether feeding xylose-treated soybean meal (XSBM) or corn gluten meal (CGM) is economically better under field conditions. Ninety-four multiparous early lactating Holstein cows (55±5 days in milk and 2.82±0.41 چکیده کامل

  This experiment was performed to investigate whether feeding xylose-treated soybean meal (XSBM) or corn gluten meal (CGM) is economically better under field conditions. Ninety-four multiparous early lactating Holstein cows (55±5 days in milk and 2.82±0.41 body condition score) were used in a completely randomized design. Cows were randomly assigned to one of two treatments: XSBM or CGM as the main rumen undegradable protein source in the diet. Dry matter intake (DMI), milk yield and fat corrected milk (FCM) were not affected by treatments. A tendency was detected for higher FCM: DMI (1.57 vs. 1.47) and income:cost (1.97 vs. 1.83) in CGM treatment. Milk urea nitrogen was greater (15.89 vs. 15.16 mg/dL) in the XSBM group. Plasma glucose, non-esterified fatty acid, beta-hydroxy butyric acid and albumin were not different between treatments. The results showed that under field conditions and feed ingredients used in this experiment, using CGM was economically beneficial during early lactation, which is in contrast with traditional beliefs. پرونده مقاله