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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Association between Backfat Depth and Litter Size at Birth in Primiparous Sows) ผู้เขียน: Atthaporn Roongsitthichai,  ดร.เสรี กุญแจนาค, ผู้ช่วยศาสตราจารย์ , Padet Tummaruk สื่อสิ่งพิมพ์:pdf AbstractThis study was undertaken to investigate the association between backfat thickness (BF) at insemination and litter size at the birth of first parity sows. In total, 201 Landrace ? Yorkshire crossbred gilts raised in a conventional open housing system from the eastern region of Thailand were included. The measurement of BF was performed using A-mode ultrasonography at the first mating day, the 70th day of gestation period, and 1 wk prior to farrowing. The gilts were categorized on the criterion of BF at the mating day into three groups: high (17–20 mm), moderate (14–16.5 mm), and low (11.0–13.5 mm). The results revealed that the gilts in the high group possessed the biggest litter size (13.1 ? 0.5 piglets), compared to the moderate and the low groups which had 12.0 ? 0.4 and 12.0 ? 0.6 piglets per litter, respectively. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Backfat Thickness at First Insemination Affects Litter Size at Birth of the First Parity Sows) ผู้เขียน:Atthaporn Roongsitthichai, ดร.เสรี กุญแจนาค, ผู้ช่วยศาสตราจารย์, Padet Tummaruk สื่อสิ่งพิมพ์:pdf AbstractThe present study was undertaken to investigate the influence of backfat thickness (BF) at the first insemination on the litter size at birth of the first parity sows. In total, 249 Landrace ? Yorkshire crossbred gilts were measured for BF at the last rib, about 6-8 cm away from the dorsal midline (P2) by A-mode ultrasonography. The BF measurement was performed three times on the gilts: the first day of insemination; the 70th day of the gestation period; and 1 w prior to the expected farrowing day. The gilts were categorized into three groups based on BF measured on the first insemination day: high (BF ? 17.0 mm, n=75), moderate (BF = 14.0-16.5 mm, n=121) and low (BF ? 13.5 mm, n=53). The results revealed that the average BF of the gilts was 15.4 ? 2.3, 17.7 ? 2.7, and 20.1 ? 2.9 mm on the first insemination day, the 70th day of gestation, and 1 w before farrowing, respectively. The gilts in the high group had a higher total number of piglets born per litter (TB; 13.1 ? 0.4) than those in the moderate group (12.0 ? 0.4, P = 0.04), and tended to have higher TB than those in the low group (12.1 ? 0.6, P = 0.1). |
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หัวเรื่อง:อิทธิพลของช่วงหย่านมถึงผสมครั้งแรกที่มีต่ออัตราเข้าคลอดและขนาดครอกของสุกรแม่พันธุ์ในประเทศไทย ผู้เขียน:ปรียพันธุ์ อุดมประเสริฐ, Kitcha Urairong, Tawatchai Sakpuaram, วรวิทย์ วัชชวัลคุ สื่อสิ่งพิมพ์:pdf AbstractData from 6,871 parity records, collecting from 8 commercial swine breeding herds which have been under the health and management services of the Faculty of Veterinary Medicine, Kasetsart University for 2 years, were used to determine the relationships between the wean-to-first-service interval (WFS) and the subsequent farrowing rate and litter size. The regression procedures both logistic and polynomial were utilized to find the models best explaining the variability of the data. Sows were most fertile when the WFS was between 3-5 days and 20-25 days. The farrowing rate for this group of sows was likely to be above 85 percent. On the other hand, the farrowing rate for sows having WFS between 0-1 day and 10-17 days could be expected to be lower than 80%. The strong association between WFS and farrowing rates suggested that a strategy to maximize sow lactation intake was likely to result in improved herd farrowing rate but may not result in improved herd litter size since WFS indicated only a small fraction of litter size variability (R2 = 0.089). |
ที่มา:การประชุมทางวิชาการ ครั้งที่ 48 มหาวิทยาลัยเกษตรศาสตร์หัวเรื่อง:อิทธิพลของความหนาไขมันสันหลังต่อขนาดครอกในแม่สุกรท้องแรก |
ผลงานตีพิมพ์ในวารสารวิชาการEffect of daily fluctuations in ambient temperature on reproductive failure traits of Landrace and Yorkshire sows under Thai tropical environmental conditionsผู้แต่ง:Jaichansukkit, T., Dr.Thanathip Suwanasopee, Associate Professor , Dr.Skorn Koonawootrittriron, Associate Professor , Tummaruk, P., Elzo, M.A., วารสาร:  
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