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 หัวเรื่อง:ผลของการจำกัดอาหารต่อการเจริญเติบโตพัฒนาการของรังไข่และท่อนำไข่ และอัตราการตายในไก่ไข่ สื่อสิ่งพิมพ์:pdf AbstractThe effects of two feed restriction programs, in which the chickens were fed for 8 hours a day (8h-fed group) and fed for eighty-five percent of the amount consumed by full-fed chickens (85%-fed group), and of conventional free feeding program (ad libitum group) on growth, development of ovary and oviduct, and mortality rate in the layer were studied. The results showed that the two feed restriction programs caused a delay in growth and a deterioration in feed conversion rate. Body weight of the 8h-fed group was lower than that of the ad libitum group at 16w. (1271g VS 1384g, P<0.05) whereas that of the 85%-fed group was lower at both 16w. (1293g VS 1384g, P<0.05) and 20w (1479g VS 1550g, P<0.05). Changing a half each of the 8h-fed and 85%-fed groups to the full feeding, and a half of the adlibitum group to the 85% feeding resulted in no significant change in body weight in any but the 85%-fed group. The 85%-fed turned full-fed bird was heavier than the remained 85%-fed bird (1861g VS 1689g, P<0.05) with higher content of the abdominal fat (107g VS 39g, P<0.05). Development of the ovary and oviduct was generally depressed by the 85% feeding program, though the difference (P<0.05) was observed only at the age of 40w. The ovary weight, oviduct weight and oviduct length of the 85%-fed group were 13.0g, 22.3g, and 59.7cm. compared with 37.2g, 53.6g, and 104.0cm of the ad libitum group and 43.0g, 55.9g, and 101.3cm. of the 8h-fed group, respectively. The three groups showed a similar number of small (diameter<2mm.) and medium (diameter 2-8mm.) follicles (P>0.05). Only the number of large follicle (diameter>8mm.) was negatively affected by the 85% feeding program. At 40w, the average number of 1.7 units of large follicle observed in the 85%-fed group was lower (P<0.05) than 5.7 and 6.0 units found in the 8h-fed and ad libitum groups, respectively. The number was, however, increased to equality with those of the other two groups after being switched to the full feeding. |
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หัวเรื่อง:ผลของวิธีการให้แสงต่อการเจริญเติบโตและความสามารถทางการให้ไข่ของไก่พื้นเมือง ผู้เขียน: Ratana Chotesangasa, Pinate Santipong สื่อสิ่งพิมพ์:pdf AbstractAn experiment was conducted to determine the effect of three lighting programmes on growth, laying performance, mortality rate and egg component in the native chicken. The three lighting programmes were : (a) the natural photoperiod during both growing and laying periods (group 12L,12L) the natural photoperiod during growing period and the photoperiod of 15 hours/day during laying period (group 12L,15L), and (c) the photoperiod of 8 hours/day during growing period and 15 hours/day during laying period (group 8L,15L). Average body weight gains, feed conversion ratios and prelaying mortality rates during growing period of three groups were not different (P>0.05). Of the 8L,15L group, 12L,15L group and 12L,12L group, ages at the onset of lay were 165.8, 171.8, and 188.8 days (P<0.05); body weights at the onset of lay were 1.5, 1.6, and 1.8 kilograms (P<0.05); and their first egg weights were 31.4, 34.7, and 35.7 grams (P<0.05), respectively. Percentages of hen-day egg production measured at 2-week intervals of the 8L,15L hen were higher (P<0.05) or tended to be higher than those of the other 2 groups. In term of cumulative egg production, the 8L,15L hen peoduced 70.7 eggs/hen/28 weeks which was higher than (P<0.05) 50.6 and 45.0 eggs/hen/28 weeks of the 12L,15L and 12L,12L hens, respectively. In general, the three different lighting programmes had no ong-term effect on feed conversion ratio in the native hen though different values (P<0.05) were sometimes observed in the early laying period. Laying mortality rate of the 8L,15L group was 40.9% which was higher than (P<0.05) 26.2% and 23.9% of the 12L,15L and 12L,12L groups, respectively. Average egg weights presented at 2-week intervals of the 8L,15L hen were lower or tended to be lower than those of the 12L,15L and 12L,12L hens almost throughout the laying period. The higher yolk percentage and lower albumen + shell percentage of the 8L,15L native hen were suggested to be the consequence of its imbalanced-increased function of the albumen + shell secreting oviduct to the yolk-ovulation ovary. |
ผลงานตีพิมพ์ในวารสารวิชาการThe effect of low-dose ochratoxin: A fed in ducks on blood haematological profiles and histopathological alterationsผู้แต่ง: Dr.Natthasit Tansakul, Associate Professor , Kusujarit, N., Dr.Chaiyan Kasorndorkbua, Assistant Professor , Dr.Kriangkrai Witoonsatian, Assistant Professor, Dr.Thaweesak Songserm, Professor , วารสาร:  
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ผลงานตีพิมพ์ในวารสารวิชาการLong-term outcomes of rapidย antiretroviral NNRTI-based initiation among Thai youth living with HIV: a national registry database studyผู้แต่ง:Dr.Sirinya Teeraananchai, Assistant Professor, Kerr, S.J., Ruxrungtham, K., Khananuraksa, P., Puthanakit, T., วารสาร: |
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 Researcherนางสาว รุ่งทิวา คนสันทัดที่ทำงาน:สถานีวิจัยประมงคลองวาฬ (ศูนย์บริหารงานวิจัยเเละสนับสนุนวิชาการ คณะประมง) คณะประมง สาขาที่สนใจ:การเพาะอนุบาลลูกสัตว์น้ำชายฝั่ง, คุณภาพน้ำกับการเพาะเลี้ยงสัตว์น้ำ Resume |
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 Researcherนางสาว วาสนา อากรรัตน์ที่ทำงาน:สถานีวิจัยประมงคลองวาฬ (ศูนย์บริหารงานวิจัยเเละสนับสนุนวิชาการ คณะประมง) คณะประมง สาขาที่สนใจ:เทคโนโลยีการเพาะเลี้ยงแพลงก์ตอนสำหรับใช้ในการอนุบาลลูกสัตว์น้ำ Resume |
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