 หัวเรื่อง:ขนาดอัณฑะ ขนาดท่อพักอสุจิส่วนหางและคุณภาพน้ำเชื้อในสุกรพ่อพันธุ์ดูรอคที่มีช่วงอายุต่างกัน ผู้เขียน: Tuonta Chansilpa, Somchai Orankano, Mongkorn Somsud สื่อสิ่งพิมพ์:pdf AbstractSeventy-two Duroc Boars were equally divided into six groups according to age intervals which were:group 1:7-9 months, group 2:10-12 months, group 3:13-15 months, group 4:16-18 months, group 5:19- 24 months and group 6:25-36 months. The age intervals had significant effects on testicular size, caudal epididymal size, semen volume and semen concentration. The boars of group 6 had the widest testis, longest testis and biggest caudal epididymis with the means of 8.2?0.48, 16.3?1.82 and 4.6?0.81 cm, respectively. The highest semen volume at the average of 190.8?33.97 ml was found in group 4 whereas the best semen concentration with the average of 4.24 x 108?2.00 x 108 spermatozoa/ml was produced by the boars in group 2. However, the sperm motility, the percentage of dead spermatozoa and abnormal acrosome were not significantly affected by the age intervals. Using simple linear regression analysis for all traits on boar ages also ahowed corresponding results. The significant regression coefficients of testicular width, testicular length, caudal epididymal size and semen concentration on boar ages were 0.704, 1.256, 0.468 and -0.065, respectively. Additionally, the significant influence of boar ages on semen volume was quadratic trend with the first and second degree regression coefficients of 14.24 and 0.314, respectively, |
หัวเรื่อง:ผลของการแยกเซมินอล พลาสมาต่อผลผลิตทางการสืบพันธุ์ในสุกร ผู้เขียน:Tuonta Chansilpa, Somchai Orankanok, Charoon Sintaweevorakul สื่อสิ่งพิมพ์:pdf AbstractSemen quality of twenty-five ejaculates from twelve boars were investigated. Each ejaculate was equally divided into three treatments: treatment 1, semen was diluted with Kiev diluter at the ratio of 1:3; treatment 2, semen was centrifuged at 2,000 rpm for 10 minutes then half of the supernatant was removed and replaced ?with Kiev ?diluter; and treatment 3, semen was centrifuged at 2,000 rpm for 10 minutes and all of the supernatant was removed and ?replaced with Kiev diluter. Semen quality of the three treatments were exammined. It was found that sperm motility and percentage of dead spermatozoa of ?all treatments were not significantly different ?(p>0.05). ?The amount ?of normal acrosome of treatment 3 was significantly ?higher than that of treatment 1 and 2. Thirtythree sows were ?inseminated with ?semen ?of the three treatments. The conception rate ?and ?the farrowing rate of treatment 1,2 and 3 were 83.33, 90.00 and 81.20 %, respectively. ?In term of pigs born alive, stillbirth ?and ?litter weight ?at ?birth, ?the means of treatment 3 was ?better ?than ?the others but the differences were not significant. |