Search Result of "Tawatchai Sakpuaram"

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:อิทธิพลของช่วงหย่านมถึงผสมครั้งแรกที่มีต่ออัตราเข้าคลอดและขนาดครอกของสุกรแม่พันธุ์ในประเทศไทย

ผู้เขียน:Imgปรียพันธุ์ อุดมประเสริฐ, ImgKitcha Urairong, ImgTawatchai Sakpuaram, Imgวรวิทย์ วัชชวัลคุ

สื่อสิ่งพิมพ์:pdf

Abstract

Data 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).

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 033, Issue 1, Jan 99 - Mar 99, Page 33 - 42 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:การศึกษาประสิทธิภาพการผลิตในฟาร์มสุกร 30 แห่ง II. ความสัมพันธ์ระหว่างดัชนีการผลิต

ผู้เขียน:Imgปรียพันธุ์ อุดมประเสริฐ, ImgKitcha Urairong, ImgTawatchai Sakpuaram, Imgวรวิทย์ วัชชวัลคุ

สื่อสิ่งพิมพ์:pdf

Abstract

The data collected during 1992 from 30 commercial swine herds using PigLIVE or PigCHAMP database was used to calculate series of production indices for each herd. The simple correlation coefficients between primary and secondary indices were examined a set of 15 members of secondary indices which were highly correlated with pigs weaned/sow/year. A linear regression model best explaining the variability in pigs weaned/sow/year was then constructed by means of All Subset Regression procedure of Statistix.tm Litters/sow/year (r = 0.93), born alive litter size (r = 0.75) and preweaning mortality (r = -0.25) were correlated with pigs weaned/sow/year. The linear regression model having wean to first service interval, farrowing rate, annual percentage increase in sow inventory, lactation length and % stillborn piglets as its independent variables, provided the best explanation for the variability in pigs weaned/sow/year (R-squared = 0.85, P<0.01). The sow lactation intake and the gilt management may be the two most important factors causing suboptimum performance among the herds studied.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 030, Issue 1, Jan 96 - Mar 96, Page 48 - 55 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:การศึกษาประสิทธิภาพการผลิตในฟาร์มสุกร 30 แห่ง I. สถานภาพในการผลิต

ผู้เขียน:Imgปรียพันธุ์ อุดมประเสริฐ, ImgKitcha Urairong, ImgTawatchai Sakpuaram, Imgวรวิทย์ วัชชวัลคุ

สื่อสิ่งพิมพ์:pdf

Abstract

A produciton profile concluded from 30 commercial swine herds, using PigLIVE or PigCHAMP database, was persented. Data validation, secection rules and definitions of procuction indices were thoroughly described. Statistics on each index were expressed as arithmetic mean, medium standard deviation, range and 95% cofidence interval. The sign of sub optimum performance was obvious among the herd population in this study. On average, only 17.6 piglets were produced per sow per year while 23 piglets were expected with the maximum biological feasibility. Extensions on procedures to maximize lactation feed intake and proper culling practice may help producers to alleviate the sub optimum productivity. Research on finding the indidence, control and prevention of reproductive diseases deserve funding priotity. A fact that the number of breeding females in this study was increasing by 16.5% during 1992 indicate the changing structure of swine production uit toward intensification and speccialization.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 028, Issue 3, Jul 94 - Sep 94, Page 413 - 421 |  PDF |  Page