Chiang, S.H.
(Farm Animals Industry Dept., Taiwan Sugar Corporation)
,
Hsia, L.C.
(Dept. of Animal Science, National Pingtung University of Science and Technolog)
There were two trials involved in the experiment. Trial 1: the trial was conducted on two Taiwan Sugar Corporation (TSC) pig farms. One was located in the north of Taiwan and the other was located in the south. Both farms had wet pad and forced ventilation (WPFV) and conventional open design (COD) b...
There were two trials involved in the experiment. Trial 1: the trial was conducted on two Taiwan Sugar Corporation (TSC) pig farms. One was located in the north of Taiwan and the other was located in the south. Both farms had wet pad and forced ventilation (WPFV) and conventional open design (COD) boar and sow houses. There were 12 Duroc boars, age ranging from 12-24 months. Half of them (6 boars) were raised in a WPFV pig house, and the other half were kept in a COD house. Semen was collected at 5-day intervals from May $1^{st}$ to the end of October. Sixteen sows (2-8 parity) were served by artificial insemination each week from the beginning of May to the end of Oct. These sows were checked for heat from 18 days to 25 days after insemination. Trial 2: there were four MPFV boar houses involved in the test. Two houses were located in the north of Taiwan, and the other two houses were located in the south. The test was conducted from January 2000 to December 2001. The total number of serviced sows by MPFV-housed boars was 35,105 head and for COD-housed boars 103,065 head. The results showed that the total semen volume, density of sperm, total sperm per ejaculate, sperm motility and morphological abnormality were significantly better (p<0.01) for boar raised in WPFV house than for COD houses. Average sperm motility in June and July was lower than for the other months. Morphological abnormality was higher during May, June and July. Although the results did not reach a significant level, the average value showed that the total volume of boar semen was higher in the north than for the south. The total semen volume production of boar raised in WPFV was higher than for boars raised in COD house, reaching a significant level only in summer. Boars kept in WPFV house had higher total sperm number than boars kept in COD house, reaching a significant level in spring (p<0.05), summer (p<0.01), and fall (p0.05). Boars raised in WPFV house had significantly higher sperm motility than boars in COD house during spring (p<0.001), summer (p<0.001), fall (p<0.01) and winter (p0.05). The present experiment shows that WPFV house can improve the reproduction performance of boars.
There were two trials involved in the experiment. Trial 1: the trial was conducted on two Taiwan Sugar Corporation (TSC) pig farms. One was located in the north of Taiwan and the other was located in the south. Both farms had wet pad and forced ventilation (WPFV) and conventional open design (COD) boar and sow houses. There were 12 Duroc boars, age ranging from 12-24 months. Half of them (6 boars) were raised in a WPFV pig house, and the other half were kept in a COD house. Semen was collected at 5-day intervals from May $1^{st}$ to the end of October. Sixteen sows (2-8 parity) were served by artificial insemination each week from the beginning of May to the end of Oct. These sows were checked for heat from 18 days to 25 days after insemination. Trial 2: there were four MPFV boar houses involved in the test. Two houses were located in the north of Taiwan, and the other two houses were located in the south. The test was conducted from January 2000 to December 2001. The total number of serviced sows by MPFV-housed boars was 35,105 head and for COD-housed boars 103,065 head. The results showed that the total semen volume, density of sperm, total sperm per ejaculate, sperm motility and morphological abnormality were significantly better (p<0.01) for boar raised in WPFV house than for COD houses. Average sperm motility in June and July was lower than for the other months. Morphological abnormality was higher during May, June and July. Although the results did not reach a significant level, the average value showed that the total volume of boar semen was higher in the north than for the south. The total semen volume production of boar raised in WPFV was higher than for boars raised in COD house, reaching a significant level only in summer. Boars kept in WPFV house had higher total sperm number than boars kept in COD house, reaching a significant level in spring (p<0.05), summer (p<0.01), and fall (p0.05). Boars raised in WPFV house had significantly higher sperm motility than boars in COD house during spring (p<0.001), summer (p<0.001), fall (p<0.01) and winter (p0.05). The present experiment shows that WPFV house can improve the reproduction performance of boars.
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가설 설정
In practice, many farms in Taiwan and Southeast Asian countries have tried to use ventilation of fan and/or sprinkling of water to solve the problem; despite this, little or no improvement in the reproduction performance of boar has been reported. This experiment was designed to find out whether wet pad and forced ventilation (WPFV) cooling system could improve boar reproductive performance or not.
제안 방법
0 (2000). The model included main effects of month, house, location, and their interaction. The test ofsignificant was by Duncan’s multiple range test.
대상 데이터
Seven of them were located in the north of Taiwan, and the other 6 were located in the south. The test was conducted from January 2000 to December 2001. The total number of serviced sows by MPFV-housed boars was 35,105 head and by COD-housed boars 103,065 head.
Both farms had WPFV and conventional open design (COD) boar and sow houses. There were 12 Duroc boars, age ranging from 12-24 months, used on each farm. The boars had been selected based on the same size of testicle and good quality of semen (motility above +++ 70%).
Two houses were located in the north of Taiwan, and the other two houses in the south. Thirteen pig farms with COD boar houses were involved in the trial. Seven of them were located in the north of Taiwan, and the other 6 were located in the south.
Trial 1 : The trial was conducted on two Taiwan Sugar Corporation (TSC) pig farms. One was located in the north of Taiwan and the other was located in the south of Taiwan.
Trial 2 : There were four WPFV boar houses involved in the test. Two houses were located in the north of Taiwan, and the other two houses in the south.
데이터처리
All the measurements were the same as for Trial 1. Data were analyzed by least squares analysis of variance using the GLM procedure of SAS 8.0 (2000). The model included main effects of month, house, location, and their interaction.
The model included main effects of month, house, location, and their interaction. The test ofsignificant was by Duncan’s multiple range test.
The test ofsignificant was by Duncan’s multiple range test.
성능/효과
The result of Trial 2 might have been influenced by management and other factors on individual farms. The results of the present experiment show that wet pad and forced ventilation cooling system can improve boar semen characteristics and sow performance under a heat stress environment.
The results showed that the boars raised in WPFV house had better semen characteristics than those raised in COD house. The max temperature in two houses differed only 35℃.
These results showed that the total semen volume, density of sperm, total sperm per ejaculate, sperm motility, and morphological abnormality were significantly better (p<0.01) for boars raised in WPFV house than COD boar houses (Table 1).
These results showed that the total semen volume, density of sperm, total sperm per ejaculate, sperm motility, and morphological abnormality were significantly better (p<0.01) for boars raised in WPFV house than COD boar houses (Table 1). Semen character on total semen volume.
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