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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Performance of Periparturient Dairy Cows Fed Alfalfa Hay in Total Mixed Ration : A Field Trial in Thailand) ผู้เขียน: ดร.ธีระ รักความสุข, รองศาสตราจารย์ ,  Sunthorn Rungruang2,, ดร.อาภัสสรา ชูเทศะ, รองศาสตราจารย์ , Theo Wensing สื่อสิ่งพิมพ์:pdf AbstractPerformance 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. |
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 Researcherดร. อรพินท์ จินตสถาพร, รองศาสตราจารย์ที่ทำงาน:ภาควิชาเพาะเลี้ยงสัตว์น้ำ คณะประมง สาขาที่สนใจ:โภชนะศาสตร์อาหารสัตว์น้ำ (Aquatic Animal Nutrition), เทคโนโลยีการผลิตอาหารสัตว์น้ำ (Aquafeed Technology), การเพาะเลี้ยงสัตว์น้ำ (Aquaculture) Resume |