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제주지역 착유우에 대한 Dry Matter, 조섬유, 에너지(TDN) 및 단백질 급여수준에 관한 조사연구
양승주 제주대학교 농과대학 제주도축산문제연구소 1991 畜産論叢 Vol.6 No.1
This study was carried out with 56 milking cows in the 6 daily farms, in order to have a grip of the actual condition of dairy cattle feeding and to get the materials for establishment of the reasonable feeding system of dairy cattle raised in Cheju-Do area. The amounts of feeds supplied to each milking cows, the levels of crude fiber in the feeds, and the amounts and levels of crude fiber in the feeds, and the amounts and levels of Dry Matter, energy(total Digestible Nutrients) and protein were investigat-ed and analyzed. The results obtained are summarized as follows; 1. Average amount of DM per cow per day was 17.97±1.501kg. This was 91% of the amounts of possible maximum intake. The range of the amounts and levels of DM fed were 15.82-25.05kg and 63-146% respetively. The results mean that DM fed is insufficient, that the considerable unbalance be-tween energy fed and protein fed is produced on account of such great range, and that the feeding system for milking cows in much unreasonable. The amounts and levels of DM by ranches and parity were showed considerable variations 2. The average amount of concentrates per cow per day was 8.66kg. The range of it was 5-15kg and was much variable. 3. The average level of roughagedthe rate of roughages per DM fed) was 24.77% and was sufficient to some degree. But the range of it was 13.72-41.1646 and the variation was much considerable, espe-cially by seasons and parity. 4. The average requirements of energy(TDN) and protein were 12.45kg and 2.69kg respectively. And the average amounts of energy(TDN) and protein fed were 12.25kg and 2.64kg respectively. The average levels(the rate of amounts fed per requirements) were 99.0% and 98.8% respectively. 5. The range of energy(TDN) fed and protein fed were 7.42-19.0lkg and 1.45-7.11kg respectively. And the range of energy and protein levels(the rate of amounts fed per requirements) were 59-161% and 68-176% respectively. These results mean that the considerabble imblance between erergy(TDN) fed and protein fed is still in existence, that the situations of severe overfeeding and under-feeding co-exist in suppling feeds to dairy cattle, and that the feeding method and system for dairy cattle in Cheju-Do area is much unreasonable and is fallen behind. The energy(TDN) and protein feedings by ranches, panty and seasons were showed considerable variations 6. Judging from these results obtained, I think that the most imporbnt things of dairy cattle feeding in Cheju-Do area were deficiency of knowlege and low level of technology for dairy cattle feeds and nu-trients, and were especially the unreasonable method and system for dairy cattle feedings.
양승주,A Reum Han,최혜림,Kyouk Hwang,Eun-A Kim,최수영,조성우 생화학분자생물학회 2020 BMB Reports Vol.53 No.10
We recently reported that N-adamantyl-4-methylthiazol-2-amine (KHG26693) attenuates glutamate-induced oxidative stress and inflammation in the brain. In this study, we investigated KHG 26693 as a therapeutic agent against glutamate-induced autophagic death of cortical neurons. Treatment with KHG26693 alone did not affect the viability of cultured cortical neurons but was protective against glutamate-induced cytotoxicity in a concentration-dependent manner. KHG26693 attenuated the glutamate-induced increase in protein levels of LC3, beclin-1, and p62. Whereas glutamate decreased the phosphorylation of PI3K, Akt, and mTOR, these levels were restored by treatment with KHG26693. These results suggest that KHG26693 inhibits glutamate-induced autophagy by regulating PI3K/Akt/mTOR signaling. Finally, KHG26693 treatment also attenuated glutamateinduced increases in reactive oxygen species, glutathione, glutathione peroxidase, and superoxide dismutase levels in cortical neurons, indicating that KHG26693 also protects cortical neurons against glutamate-induced autophagy by regulating the reactive oxygen species scavenging system.
감귤부산물의 사료화에 관한 연구 5 . 면양에 의한 감귤가공 부산물사일리지의 소화율 및 반추위액의 pH 와 total - VFA 농도 변화
양승주,정창기 ( S . J . Yang,C . C . Choung ) 한국축산학회 1986 한국축산학회지 Vol.28 No.2
In order to examine the value of citrus byproducts as livestock feed, 4 types of CBS were made: T1; wet CMS with high moisture. T?; pre-wilted CMS with low moisture. T3; wet CPS with high moisture. T4; pre-wilted CPS with low moisture. Digestion trials were carried with 3 sheep equipped with rumen fistulars. Rumen liquor pH and total VFA were investigated during the trial period. The daily intake of the trial feed (CBS+hay) was 0.76-0.78㎏ DM (1.8-1.9% by body wt.). Feeding CBS showed the effect of increasing the feed. intake. Compared with high moisture CBS, low moisture CBS increased feed intake and digestibility, and was weak in the tendency of lowering rumen liquor pH. Compared with CPS, CMS showed a tendency more similar to low moisture CBS. Feeding CBS had the effect of increasing urine excretion, water intake and digestibility of DM and DNFE. When fed CBS the pH and total VFA in rumen liquor were lower than when fed hay. Such tendency was shown in the case of feeding high moisture CBS compared to low moisture CBS. The digestibility of CBS had no relationship with pH, but there was a statistical significant correlation between total VFA in rumen liquor and digestibility of CBS. It appears from the results of these trials in the making and utilization of CBS that CMS was better in all respects than CPS and prewilted CBS with low moisture (about 76%) was more effective than wet CBS with high moisture (about 83%).
감귤부산물 silage 의 수분함량 및 첨가물의 첨가가 품질과 DM 소화율에 미치는 영향
양승주,정창조 ( Seung Ju Yang,Chang Cho Choung ) 한국축산학회 1985 한국축산학회지 Vol.27 No.4
To utilize citrus byproducts for animal feeds two different silages were made 1) using citrus peel 2) using citrus pulp mixture. The experimental design included 12 treatments, six for citrus peel silage and six for citrus pulp mixture silage, then treatments were allocated according to sun-drying and urea, barley straw and NaOH treated straw additions. Chemical composition, pH, organic acid and NBDMD were examined and treatments compared. Sun-drying (3 days) citrus waste reduced the moisture content by 6-10%. Addition of barley straw reduced the moisture content of the two silages by 4-8%. The content of protein was increased 1.25-1.63% by the urea addition of 0.6% of the silage weight. Crude fiber was increased 4-5% by the addition of 8-10% barley straw, and also increased 7-8% by the addition of 16-21% barley straw. But the change in the other ingredients by the addition of barley straw was not found, except NFE wait decreased. The pH of the non-treated silage was 3.4-4.7, and that was increased by the addition of urea and NaOH. The content of organic acid was changed by the addition of urea as follows: (1) the content of lactic acid was lowered, and (2) L.A./T.A. was decreased. But by the addition of 8-10% barley straw by the silage weight, the content or lactic acid was increased and the standard of L.A./T.A. was heightened. On the contrary, it showed the tendency of decreasing in the case of the addition of 16-20% barley straw. The range of NBDMD of raw citrus byproducts was 79.64-81.11%. That of the citrus byproducts silage was increased by the addition of urea (84.16-88.08%), and decreased by the addition of barley straw (62.4-73.16%). The addition of urea and alkali treated straw significantly increased digestibility especially in pulp mixture silage but had the reverse effect on silage quality.