• Journal of Animal Science and Technology
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• v.54 no.4
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• pp.291-297
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• 2012

This study was carried out to investigate the effect of dietary phytase on nitrogen and phosphorus excretion of gestating and lactating sows (Yorkshire ${\times}$ Landrace ${\times}$ Duroc). Twelve gestating sows and twelve lactating sows were used in this study and were divided into 2 groups (1 control group and 1 treatment group, 6 replications/group) the control group was without phytase and the treatment group was fed with phytase (750 FTU/kg) in the diet, respectively. Body weights of gestating and lactating sows were $208.9{\pm}13.8$ kg and $190.5{\pm}22.9$ kg, respectively. In gestating sows, feed intake was greater in phytase fed group than the control (P<0.05), but water intake and total excretion were not different between the groups. In lactating sows, feed and water intakes and total excretion were not different between the groups. The N intake of lactating sows was higher in phytase fed group than control (P<0.05) but N excretion ratio was not different. In lactating sows, N intake and excretion and N excretion ratio were not significantly different between the groups. P excretion and excretion ratio in gestating sows decreased by phytase treatment (P<0.05) as compared to control. In lactating sows, N intake and excretion was not significantly different by added phytase (P>0.05). Finally, dietary addition of phytase decreased P excretion in feces of gestating and lactating sows.

• Feed Journal
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• v.4 no.8 s.36
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• pp.108-113
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• 2006

양돈장에서 번식돈은 농장의 시작이자 마지막이라 과언이 아닐 것이다. 그만큼 중요한 돼지이며 번식돈 관리만 철저히 해도 소모성 질병으로부터의 피해를 어느 정도는 줄일 수 있다고 생각한다. 이렇게 중요한 번식돈 관리가 모두가 알고 있는 것처럼 여름철에는 매우 힘들다. 힘든 여름철 번식돈 관리의 핵심은 사료 섭취량에 있다. 사람도 여름철이되면 입맛이 떨어지고 차가운 물만 찾는 것과 마찬가지로 돼지도 그렇다. 덥기 때문에 사료 섭취량은 자연적으로 감소하게 되고 포유돈의 경우 줄어든 사료 섭취량은 모유 분비량에 직접적인 영향을 미치기 때문에 이유 제충이 감소하게 되고 이는 농장 총 육성률에 영향을 미치게 된다. 다시 말해서 여름철 포유돈 사료 섭취량 감소는 이유 체중, PSY(연간 모돈 두당 이유자돈수), MSY(연간 모돈 두당 출하두수) 그리고 WSY (연간 모돈 두당 출하체중)에 결정적인 영향을 미친다 해도 과언이 아닌 것이다. 여름철 번식돈 관리 방안을 논하기에 앞서 대한민국 여름철은 어떤 특징을 갖고 있는지 생각해보자. 여름철 날씨를 대중 목욕탕 사우나에 비교해서 설명해 보겠다. 대중 목욕탕에 가보면 사우나가 있는데, 이 사우나를 대한민국 여름철과 비교해 볼 수 있다. 사우나에는 건식과 습식 사우나가 있는데, 이 두 사우나실의 온도를 보면 건식보다 습식사우나실의 온도가 10~20℃ 정도 더 낮은 것을 볼 수 있다. 그러나 실제로 사람이 느끼는 온도는 습식 사우나실에 들어갔을 때 더 뜨겁게 느낀다. 상대적으로 낮은 온도임에도 불구하고 습식 사우나실이 더 뜨겁다고 느끼는 이유는 습도에 의한 것이다. 대한민국 여름철은 바로 습식 사우나실과 같은 환경인 것이다. 지금부터는 습식 사우나실과 같은 고온 다습한 대한민국 여름철 환경에서 번식돈이 받을 수 있는 고온스트레스의 정도와 고온 스트레스가 번식돈 생산성에 미치는 영향을 설명하고자 한다.

• The Korea Swine Journal
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• v.21 no.9 s.241
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• pp.75-79
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• 1999

경기 이천, 충북 괴산, 강원 원주 일대 양돈농가들이 98년 10월경 대상(주)의 임신돈, 포유돈 사료를 먹인 돼지들에게서 고열과 사료 섭취거부, 구토, 유산, 무유증, 모돈의 야윔, 모돈 폐사 등이 발생해 30여 양돈농가에서 5만여 마리의 돼지가 떼죽음을 당하는 심각한 피해가 발생했다며 보상을 요구하고 있다. 피해농가들은 대상(주) 이천배합사료 공장의 포유돈, 임신돈 사료에 곰팡이 독소가 함유되어 이같은 피해가 난것"이라고 주장하고 있다. 피해 농가들은 충주대학교 식품과학과 이웅수 교수, 경상대 식품과학과 정덕화 교수 등을통해 사료에서 곰팡이 독소가 검출됨을 확인하고 14농가가 대상(주)와 서울지방법원 남부지원에 51억 3백만원의 손해배상 소송을 제기했다. 반면, 대상(주) 측에서는 사료와는 전혀 관계가 없는 일이라 주장하고 있으며, 농가측의 주장을 전면 부정하고 있다.

• The Korea Swine Journal
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• v.21 no.4 s.236
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• pp.96-98
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• 1999

• Bulletin of Korea Environmental Preservation Association
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• v.12 no.3
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• pp.6-7
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• 1990

• Journal of Embryo Transfer
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• v.18 no.3
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• pp.257-262
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• 2003

These studies were performed to improve the reproductive efficiency of gilts and we investigated the effects of nursing periods after parturition and backfat thickness will adapt to these results for early selection of excellent gilts. The main results were as follows; 1. The backfat thickness in sows nursing for 17∼21 days was 19.19 mm, and 16.52 mm in 22∼26 days and longer nursing period affected significantly the backfat thinner (p<0.01). 2. The recurrence of estrus in sows nursing for 17∼21 days was 5.76 day and 5.62 day in 22∼26 days and there was no difference between nursing periods. 3. The recurrence of estrus in sows had 13∼16 mm backfat thickness was 5.69 day, 5.67 day in 17∼20 mm and 5.75 day in 21∼23 mm and there was no difference among backfat thickness. 4. The concentration of plasma estradiol were 28.49 pg/$m\ell$ in parturition, 12.39 pg/$m\ell$ in weaning and 16.52 pg/$m\ell$ in return of estrous. The concentration ot plasma progesterone were 1.50 ng/$m\ell$ in parturition, 0.69 ng/$m\ell$ in weaning and 0.94 ng/$m\ell$ in return of estrous. The concentration of plasma cortisol were 57.74 ng/$m\ell$ in parturition, 43.01 ng/$m\ell$ in weaning and 47.89 ng/$m\ell$ in return of estrous. There showed the highest level of estradiol, progesterone and cortisol in parturition.

• Feed Journal
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• v.2 no.6
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• pp.98-101
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• 2004

이 시기에는 돼지의 골격이 발달하는 시기이므로 고단백, 고에너지 사료인 젖먹이 및 육성돈 사료를 무제한 급여할 것이며, 육성초기인 포유기에는 고형사료에 대한 소화흡수 능력이 부족하므로 이에 알맞는 효성활성제가 포함된 고농축 사료를 급여해야한다. (중략)

• Journal of Animal Science and Technology
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• v.49 no.4
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• pp.451-458
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• 2007

This study was to investigate the effectiveness of pre-weaning injection of gonadotropin and scheduled fixed-time insemination on sow fertility. Sows were randomly assigned to receive gonadotropin 2 days before weaning, 1 day after weaning or none as control. In gonadotropin treated groups, half of sows were inseminated twice at 24 and 36 hours after onset estrus and half of sows were inseminated twice at scheduled fixed-time. Weaning to onset of estrus was the shortest in lactating sows injected with gonadotropin prior to weaning. Liter size was significantly higher in AI groups after detection of estrus, compared to fixed-time AI group. Results of these experiments indicated that injection of gonadotropin in lactating sows could initiate the final follicular development, and has potential to enhance the reintegration of estrus. Further researches are needed to define the relationship between reduced interval of wean to onset estrus and enhanced fertility in lactating sows.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.5 no.3
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• pp.254-259
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• 2004

This experiment was conducted to investigate the effects of supplemented diets with Malty Culture(MC) during lactation on sow and litter performance. Eighteen lactating sows were randomly assigned to three dietary treatments(basal diet, basal diet+MC0.5%, basal+MCl.0%). Average daily feed intake of sow was not affected by dietary treatments with treatment means ranging from 4.49 to 4.58kg(p>0.62). All sows lost their backfat thickness during lactation with no difference among the treatments(p>0.25). Fecal moisture was similar for sows fed the control and MC treatments with 70% moisture content. The growth rate of piglets was not significant difference among the treatments ranging from 47 to 48kg. Day to estrus postweaning was not affected by supplementation of MC with treatment means ranging from 5 to 7 days. There was not significant difference in the milk production(i.e, 8.9kg/d for control, 9.18kg/d for MC0.5 and 9.20kg/d for MC1.0). Survivability of piglet was affected by feeding added MC during lactation. There was no significant difference in the digestibility of DM, but the digestibility of N tended to increase in sows fed the MC0.5 and MC1.0 supplemented diets compared to the basal diet(linear effect, p<0.10; quadratic effect. p<0.08). Digestibility of P tended to increase by the treatment of supplemented MC. However, there was no significant difference among the treatments. In conclusion, the results of experiment suggest that lactation diet of supplemented MC could be a beneficial feeding for digestibility in sow and litter performance.

• Journal of Animal Science and Technology
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• v.47 no.4
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• pp.691-696
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• 2005

Suckling piglets must avoid positions with high air velocity because they don’t have hypodermic fat. Therefore this study examined the effects of air ejection on the behaviors of sows and their piglets. Compressed air was released for 5s at 5s intervals between floor and udder of sows only when they were standing or sitting. Sixteen multiparous crossbred(Landrace×Yorkshire) sows and their piglets were used. Behaviors of sixteen sows and their piglets were recorded for 4 days postpartum, using the LED lamp(wavelength:950nm), CCD camera(Samsung SDC-411), multiplexer(Samsung SDM-080), and time lapsed VCR(Samsung SRV-30). The videotapes were scanned every 30s to obtain an instantaneous behavioral sample. The sow’s standing and sitting rates between control group(CG) and air ejection group(AEG) were not significantly different(P＞0.05). This means that air ejection does not affect the behavior of sows. Frequency of the suckling piglets’ behaviors closely related to the crushing by sows was lower in AEG than in CG(P＜0.05). These results suggest that air ejection may be available for reduction of the crushing of suckling piglets by sows.