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ผลงานตีพิมพ์ในวารสารวิชาการEffects of evaporative cooling on reproductive performance and milk production of dairy cows in hot wet conditionsผู้แต่ง: Khongdee, S, Chaiyabutr, N, Hinch, G,  Dr.Kanchana Markvichitr, Professor , Mr.Chanvit Vajrabukka, Professor, วารสาร:  
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ผลงานตีพิมพ์ในวารสารวิชาการRelationship between haemoglobin types and productivity of Thai indigenous and Simmental x Brahman crossbred cattleผู้แต่ง:Boonprong, S., Dr.Apassara Choothesa, Associate Professor, Mrs.Choosri Sribhen, Assistant Professor, Parvizi, N., Vajrabukka, C., วารสาร:  |
ผลงานตีพิมพ์ในวารสารวิชาการEffect of supplementary lighting on eating behaviour by corralled swamp buffalo (Bubalus bubalis) heifers in Thailandผู้แต่ง:Somparn, P., Gibb, M.J., Dr.Kanchana Markvichitr, Professor, Chaiyabutr, N., Thummabood, S., Vajrabukka, C., วารสาร: |
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ผลงานตีพิมพ์ในวารสารวิชาการEffect of source of methionine in broken rice-soybean diet on production performance, blood chemistry, and fermentation characteristics in weaned pigsผู้แต่ง:Krutthai, N., Mr.Chanvit Vajrabukka, Professor, Dr.Kanchana Markvichitr, Professor, Dr.Apassara Choothesa, Associate Professor, Dr.Jamroen Thiengtham, Associate Professor , Dr.Suriya Sawanon, Professor , Mr.Chanwit Kaewtapee, Associate Professor , Dr.Chaiyapoom Bunchasak, Professor , วารสาร: |
ผลงานตีพิมพ์ในวารสารวิชาการDifferences of skin morphology in Bos indicus, Bos taurus, and their crossbredsผู้แต่ง:Jian, W, Duangjinda, M, Mr.Chanvit Vajrabukka, Professor, Katawatin, S, วารสาร: |
ผลงานตีพิมพ์ในวารสารวิชาการBlood biochemical profiles of Thai indigenous and Simmental X Brahman crossbred cattle in the Central Thailandผู้แต่ง:Boonprong, S, Mrs.Choosri Sribhen, Assistant Professor, Dr.Apassara Choothesa, Associate Professor, Parvizi, N, Mr.Chanvit Vajrabukka, Professor, วารสาร: |
ผลงานตีพิมพ์ในวารสารวิชาการProductivity of Thai Brahman and Simmental-Brahman crossbred (Kabinburi) cattle in central Thailandผู้แต่ง:Boonprong, S, Dr.Apassara Choothesa, Associate Professor, Mrs.Choosri Sribhen, Assistant Professor, Parvizi, N, Mr.Chanvit Vajrabukka, Professor, วารสาร: |
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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Seasonal Influences on the Productive Performance of Horro Cows at Bako, Ethiopia) ผู้เขียน:Gizaw Kebede, ดร.กัญจนะ มากวิจิตร์, ศาสตราจารย์, ดร.สมเกียรติ ประสานพานิช, รองศาสตราจารย์ , นายชาญวิทย์ วัชรพุกก์, ศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractTen years’ data of milk production and reproduction from 473 Horro cows at Bako Agricultural Research Center was investigated if there was seasonal variation in milk production and reproductive parameters (days open and services per conception) of Horro cows. Cows grazed on natural pasture for about 7 hours by day and kept in barns at night. Supplementary feeds (hay, silage, concentrate) were provided to cows from 7 months of pregnancy until parturition and only concentrate meal during milking. Multiple regression analysis from SAS was used to investigate the relationship of milk production, days open and services per conception with mean temperature, relative humidity, sunshine hours and wind speed. Stepwise selection procedure was used to examine the different regression equations. Mean temperatures and Temperature Humidity Index remained higher in February to April, after which they declined. Milk yield was affected by daily mean temperature (P<0.001), sunshine hour (P<0.001) and wind speed (P<0.05). The over all mean (?SE) milk yield (kg) of the cows was 402.86?19.31 over a mean lactation length of 185?4.77 days. Production did not vary significantly (P>0.05) among seasons, but was higher for cows calved in the spring and summer. Milk production was found to be significantly (P<0.01) influenced by parity; yields increasing from parity one to parity four where it peaked. Services per conception were significantly (P<0.01) affected by only relative humidity. Significant (P<0.05) differences were observed in days open with the highest days open being in February (224 days). Days open was significantly affected (P<0.001) by daily mean temperature. |