Search Result of "periparturient"

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งานวิจัย

การเปลี่ยนแปลงทางจุลพยาธิวิทยาและชีวเคมีในตับโคนมระยะคลอด (2001)

หัวหน้าโครงการ:Imgดร.ธีระ รักความสุข, รองศาสตราจารย์

แหล่งทุน:สำนักงานกองทุนสนับสนุนการวิจัย

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ผลงานตีพิมพ์ในวารสารวิชาการ

A field study on negative energy balance in periparturient dairy cows kept in small-holder farms: Effect on milk production and reproduction

ผู้แต่ง:ImgDr.Theera Rukkwamsuk, Associate Professor,

วารสาร:

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ผลงานตีพิมพ์ในวารสารวิชาการ

Clinical-biochemical Observations in Periparturient Dairy Cows with Experimentally Induced Fatty Liver

ผู้แต่ง:ImgDr.Theera Rukkwamsuk, Associate Professor, ImgTheo Wensing, ImgHenk J. Breukink,

วารสาร:

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Clinical-biochemical Observations in Periparturient Dairy Cows with Experimentally Induced Fatty Liver)

ผู้เขียน:Imgดร.ธีระ รักความสุข, รองศาสตราจารย์, ImgTheo Wensing, ImgHenk J. Breukink

สื่อสิ่งพิมพ์:pdf

Abstract

In 4 experimental studies, occurrences of health problems during the first 4 weeks of lactation were monitored in 36 control cows and 38 experimental cows that were overfed during the dry period to induce overconditioning at calving and deep negative energy balance and fatty liver postpartum. The experimental cows experienced postparturient problems, including milk fever (37%), acetonemia (8%), abomasal displacement (8%), mastitis (10%), and hoof problems (8%). Acetonemia and abomasal displacement were not observed in the control cows. Milk fever, mastitis, and hoof problems were observed in 3%, 6% and 3% of the control cows, respectively. The experimental cows gained more body weights during the dry period and lost more weights during the first 4 or 5 weeks of lactation than did the control cows. Between 1 and 2 weeks after parturition, the experimental cows had higher concentrations of blood nonesterified fatty acids, blood 3-hydroxybutyrate, and liver triacylglycerols, and had lower concentrations of liver glycogen than did the control cows. Blood glucose and insulin concentrations did not differ between the two groups. When data of the 4 studies were pooled, blood nonesterified fatty acid concentrations were positively correlated with blood 3-hydroxybutyrate and liver triacylglycerol concentrations, and were negatively correlated with liver glycogen concentrations. These results indicated that cows responded to a marked increase in energy requirements in early lactation by increased glycogenolysis in the liver and lipolysis in adipose tissue. In conclusion, overfeeding of cows during the dry period resulted in overcondition at calving. Overconditioning predisposed a cow to develop severe fatty liver postpartum and to experience more postparturient problems. The concentration of blood nonesterified fatty acids postpartum could be used as a routine indicator for the development of fatty liver in dairy cows postpartum.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 041, Issue 4, Oct 07 - Dec 07, Page 717 - 723 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Performance of Periparturient Dairy Cows Fed Alfalfa Hay in Total Mixed Ration : A Field Trial in Thailand)

ผู้เขียน:Imgดร.ธีระ รักความสุข, รองศาสตราจารย์, ImgSunthorn Rungruang2,, Imgดร.อาภัสสรา ชูเทศะ, รองศาสตราจารย์, ImgTheo Wensing

สื่อสิ่งพิมพ์:pdf

Abstract

Performance of 20 periparturient Holstein Friesian dairy cows fed alfalfa hay-base total mixed rations during transition and lactation periods was studied in a commercial dairy farm. From 7 d prior to anticipated calving date until 7 d after calving, all cows were also drenched with 400 ml of propylene glycol once daily. Blood samples were collected at -2, 1, 2, 3 and 4 wk from parturition. Milk yields were recorded daily, and milk samples were collected twice a week to determine milk compositions. Compared with the concentrations at -2 wk, serum glucose and urea nitrogen concentrations decreased whereas serum non-esterified fatty acid and ?-hydroxybutyrate concentrations increased after calving. These results indicated that these cows entered some degrees of negative energy balance. Average milk production during 30 d postpartum was 34.8 ? 8.7 kg/d. Average days from calving to first service was 86 ? 24 d, and 55% of 20 cows were conceived at first service. In conclusion, cows fed alfalfa hay-base diet and drenched with propylene glycol during periparturient period could improve negative energy balance, milk yield and conception rate. However, replacing roughages from agro-industry by product with alfalfa hay in Thai dairy farms would depend on the economical analysis because most alfalfa hay was imported from foreign country.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 042, Issue 1, Jan 08 - Mar 08, Page 11 - 18 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Negative Energy Balance in Periparturient Dairy Cows Raised in Small-Holder Farms in Kamphaengsaen District, Nakhon Pathom Province)

ผู้เขียน:Imgดร.ธีระ รักความสุข, รองศาสตราจารย์, Imgดร.นิติพงศ์ หอมวงษ์, อาจารย์, ImgWeerapong Bumkhuntod, ImgPiyakan Rohitakanee, ImgRungthip Sukcharoen

สื่อสิ่งพิมพ์:pdf

Abstract

Negative energy balance was studied in 45 periparturient dairy cows from 15 small-holder farms in Kamphaengsaen District, Nakhon Pathom Province. Blood samples were collected at 1 week prepartum and 2 and 4 weeks postpartum for evaluation of negative energy balance and to study the relationship between concentrations of serum non-esterified fatty acid, serum glucose and body condition score. The results revealed that there were no significant differences in concentrations of non-esterified fatty acid at 1 week prepartum and 2 and 4 weeks postpartum. The concentrations of serum glucose and body condition score were significantly decreased after parturition. The changes of body condition score between 1 week prepartum and 2 weeks postpartum (r = 0.475) or between 1 week prepartum and 4 weeks postpartum (r = 0.364) were positively correlated with serum concentrations of non-esterified fatty acid at 2 weeks postpartum. In conclusion, periparturient dairy cows of small-holder farms in Kamphaengsaen District, Nakhon Pathom Province had some degrees of negative energy balance as observed by decreased serum glucose concentration and decreased body condition score. The results of this study would be useful for small-scale herd management to prevent periparturient negative energy balance problems and its consequences.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 040, Issue 4, Oct 06 - Dec 06, Page 1000 - 1004 |  PDF |  Page 

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