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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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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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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: |
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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of Different Levels of Rain Tree (Samanea saman) Pods in Meal Concentrate on In Vitro Fermentation by a Gas Production Technique) ผู้เขียน:Sareena Semae, Phongtorn Kongmun, นายชาญวิทย์ วัชรพุกก์, ศาสตราจารย์, Somchai Chanpongsang, Somkiert Prasanphanich สื่อสิ่งพิมพ์:pdf AbstractThe effect was studied of various levels of rain tree pods (RTPs) in meal concentrate on in vitro fermentation using a gas production technique. RTPs were used at levels of 0 (control), 20, 40, 60, 80 and 100% in the meal concentrate. The gas production was recorded at 2, 4, 6, 8, 10, 12, 18, 24, 36, 48, 60, 66 and 72 hr of incubation. In vitro true digestibility (IVTD), total volatile fatty acids (TVFAs), acetate (C2), propionate (C3), butyrate (C4) and ammonia nitrogen (NH3-N) were investigated. The gas production at 4 to 8 hr was significantly different (P < 0.05) among treatments. The IVTD levels in the control diet and with 20, 40 and 60% RTP levels were significantly higher (P < 0.05) than for the 80 and 100% levels of RTP. The C2 level in the control diet was the lowest but levels of C3 and C4 were higher than in the other groups. The level of NH3-N in the control diet and with levels of 20, 40 and 60% RTP levels were significantly higher (P < 0.05) than at the 80 and 100% RTP levels. This study revealed that RTPs could be an alternative feedstuff for ruminants and possibly replace meal concentrate up to 60% without any negative effect based on the in vitro study. |
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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. |
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