The aim of this study was to investigate the effects of dietary supplementation of pelleted-Italian Ryegrass (IRG) as a source of fiber on reproduction performance in pregnant sows. A total of 24 pregnant sows were randomly assigned to four dietary treatments, which was given a corn-soybean diet with 0%, 10%, 20%, and 30% pelleted-IRG from 105 days prepartum to 7 days postpartum. During experimental period, the sows fed the IRG supplemented diet showed the lower feed intake than the sows fed the control diet (p<0.05). The changes of body weight in sows from initial to pre- and/or post-partum was significantly smaller in sows fed the IRG supplemented diet than control group. It is thought that the lower weight gain in IRG supplemented groups is caused by low feed intake. Although there was no significant difference, sows fed the IRG supplemented diet tended to increase the litter size and birth weight in piglets compared with sows fed the control diet. This result suggests that the dietary supplementation of IRG has the positive effects to improve the reproductive performance in sows. But, the excessive feeding of IRG to sows might cause to retard the days of return to estrus, and decrease the contents of solid, milk protein, and milk fat in colostrum. Thus, the addition of about 10% IRG is desirable to increase the reproductive performance. Meanwhile, the feeding energy diet is better effective than feeding the fiber diets to improve overall productivity in sows after postpartum.

펠렛사료는 습체사료(떡사료)의 문제점인 사료조제의 불편성, 장기보존 및 유통의 어려움을 해소할 수 있고 누구나 쉽게 이용할 수 있기 때문에 연중 곤충사육 및 체험에 특히 유리하다. 이에, 학습교재용 곤충으로 이용이 많은 배추흰나비용 펠렛사료를 개발하고 이를 이용한 사육시험을 수행하였다. 펠렛사료 제조를 위한 이축압출기 최적 운전조건은 main motor 300rpm, feed motor 50rpm, 가수량 80ml/min, 스크류 배열 3, 8 reverse screw 및 사료배출구 φ5mm 임을 확인하였다. 배추흰나비의 영양요구성을 만족하면서 튀김성이 우수한 펠렛사료는 연구실에서 개발하여 사용중인 나비용 습체사료에 비해 Oil, Cellulose 및 성형제 비율은 낮아지고 전분 및 단백질 함량은 상대적으로 높아진 사료조성을 보였다. 기주로 케일분말을 20% 첨가하였을 경우 사료의 직경은 9.3mm로 2배 정도 튀겨졌으며 사료무게의 1.5~1.8배의 물을 흡수하였다. 펠렛사료를 이용하여 배추흰나비를 사육한 결과 유충기간이 15.2일로 기주사육구 11.2일에 비해 다소 늦어졌으며, 우화율도 펠렛사료구 71.4%로 기주사육구 85.0%에 비해 낮았다. 그러나 용체중은 펠렛사료구 251.7mg으로 기주사육구 156.9mg에 비해 월등하게 높았으며 성충의 크기도 현저한 차이를 보였다.

Development of pellet-type artificial diet for insect was tried by using a twin screw extruder(TSE). Screws were arranged several times and two reverse screws were equipped on the foreparts of 2 axes of TSE. Pellet-type diet could be produced successfully under conditions of TSE set as the following. , 300 rpm of main motor speed, 228 rpm of feed motor speed, 75㎖/min of running water speed and 5 ㎜ of extrusion diameter. The optimum adding quantity of water to the manufactured diet was 1.2~1.5 times of dry diet. On the rearing results of beet armyworm, Spodoptera exigua and common cutworm, Spodoptera litura with the pellet-type diet, the final survival ratio (emergence rate) of these two species was over than 50%, and so it was concluded that the manufactured pellet-type artificial diet was sufficient dietetically to rear those insects.

The present study evaluated the blood profile and meat color of ducks with Houttuynia cordata (H. cordata) pellets in their diets. In total, 120 pekin ducks (1-d-old) were used in a 42 d growth trial. Ducks were randomly allocated to six pens and exposed to three replicates of two treatments: (1) controls as basal diet and (2) basal diet + 2% H. cordata pellets (T1). Total-cholesterol, HDL-cholesterol, triglyceride contents or L* and b* vaules revealed significant difference (p>0.05) in compared with those in the controls; however, dietary supplementation of H. cordata pellets did not affect (p>0.05) LDL-cholesterol, VLDL-cholesterol and a* values. In conclusion, the inclusion of 2% H. cordata pellets improved HDL-cholesterol and meat color in duck breast and thigh meats, which further reduced other cholesterol values.