飼料資源開發을 위한 雜灌木樹葉의 飼料價値와 韓牛의 放牧利用에 關한 硏究

尹益錫,陸完芳,李仁德,曺圭燉,金炯基 건국대학교 1978 學術誌 Vol.22 No.1

As a part of forestry utilization for livestock feed resources the feeding value ague of shrub leaf by growth stage and grazing behabiour of the native cattle at shrubby grassland in function of seasons were investigated and the following results were obtained. 1. The crude protein content of oak leaf declined as the growth stage increased whereas the contents of crude fiber and crude fat showed the opposite tendency. 2. The intake of oak leaf paralleled with the amount given while the intake of the mixed grass leas remarkable increased and the body weight gain was also remarkably increased. 3. The average number of oak leaf intake was 70.5 times for spring, 148.7 for summer, and 395.7 for autumn. 4. The grazing time by the native cattle was decreased in the order of spring, autumn, and summer. As for the grazing behaviour, the intake activity was most active during morning, mid-day and late afternoon or three times a day. 5. The duration of rumination was found to be in the decreasing order or summer, autumn and spring, cattles ruminated more when the grasses were more abundant. 6. As for the inactive period of animal, it was short during spring when the animals spent more time for eating but it was about 5 times longer during both summer and autumn.

자연초지의 초생개량에 관한 연구;제2보 Ladino clover 의 추파초지에 대한 석회 및 인산의 효과

윤익석 한국축산학회 1965 한국축산학회지 Vol.7 No.1

In order to investigate the effects of ground lime stone and superphosphate on ladino clover reseeded in natural grassland which showed deficiencies in lime and phosphate contents, an experiment was conducted from August, 162 to April, 296. The results are summarized as follows: 1. As regard to germination, the effect of phosphate was highly significant (P$lt;0.05) whereas the effects of lime and the lime-phosphate interaction ware not recognized. 2. Lime and phosphate were effective at 5% and 1% levels, respectively on early growth of the ladino clover. 3. Without phosphate application un such phosphate-deficient soil as this experimental plots, gutting of ladino clover was impossible. 4. The fresh yields of native grasses, lading clover, and native grasses plus ladino cover in 1963 proved a highly significant increase (P$lt;0.01) from phosphate application, and a significant increase (P$lt;0.05) from the lime-phosphate interaction; but the effect of lime was not recognized. 5. The results of soil analysis at the end of the experiment showed that an increased liming resulted in an increased pH value of a small magnitude, and the deeper the soil depth, the lower the contents of available phosphate and potassium and the pH value.

자연초지에 추파한 목초의 생산력 비교시험

윤익석 한국축산학회 1962 한국축산학회지 Vol.4 No.1

1. Eight kinds of forage crops, that are four grasses and four legumes, were reseeded in the natural grassland, to determine the yield of each forage crop and to evaluate the effect of competition between those crops, in 1960 and 1961. 2. In the first year, the yields of Orchard grass and Perennial ryegrass and Reed cana grass were abandant, whereas Ladino clover and Alfalfa showed poor yield Generally the yield of grasses was higher than that of legumes. 3. The yield of wild grasses in the legume crop plots was increased more than that in the grass crop plots during the first year. 4. In the second year, the yield of Red clover and Orchard grass was high, whereas Alfalfa, Perennial ryegrass and Sericea lespedeza showed low yield. 5. The yield of wild grass in the legume crop plots was higher than the grass crop plots in the second year. The above result suggested that the nitrogen content of legume crop plot soil was increased by the nitrogen fixation of legume crops. 6. The comparison of forage yields in the second year with that in the first year shows as follows. a). The yields of legumes showed much higher increasing ratios than grasses. Especially, Ladino clover yielded two hundred and eight times of the first year in the plots of the second year. It will show much increasing ratio in the succeeding year. b). Red clover, Ladino clover and Orchard grass among eight kinds of forage crops seem to be suitable kinds of forage crops for reseeding in the natural grassland.

飼料作物의 營養 生理에 관한 硏究

尹益錫 건국대학교 1970 學術誌 Vol.11 No.1

This experiment was designed to investigate the optimum pH for Ca++ and PO4-- intake of corn crops as a pasturage, besides the effect of NO3-N and NH4-N sources media and physiological condition o: plants. The obtained results are summerized as follows; 1.The optimum pH values for Ca++ and PO4-- intake was seemed to be 7 and 6 respectively. 2.In case of Ca++, the ion uptake was higher in NO3-N media than NO4-N while the PO4--N uptake was less in NO3-N. 3.The plants starved for 30 hours in distilled water, had poor condition for ion up take.

靑刈作物의 刈取頻度에 따른 乾物收量 및 可消化 養分에 關한 硏究

尹益錫,全炳台 건국대학교 1988 學術誌 Vol.32 No.2

This study was conducted to evaluate the fresh and dry matter yields and digestible nutrition in accordance with cutting management of promising Sorghum-Sudangrass hybrids. The results are summarized as follow: 1.Total fresh fodders were the highest at three time cutting management for Pioneer 988 and at four times for Sordan 79, but dry matter yields were the highest at two time cutting a year in both cultivars. The best forage yields were obtained from less frequent harvest. 2.Dry matter yields per day were higher with the second cut taken about 30 days after the cut. 3.In vitro dry matter digestibility of Pioneer 985 was similar with that of Sordan 79 with ca. 60%. All cultivars tended to give the highest in vitro dry matter digestibility during the rapid growing period, but digestible dry matter yields were the highest at two time cuttings a year in both cultivars. 4.Total crude protein yields were the highest at two time cutting management for Pioneer 988 and at four times for Sordan 79. 5.Crude fiber and crude fat contents decreased with increasing cutting times.

林地의 畜産的 利用에 관한 調査硏究 : 第3報, 採取時期가 雜灌木樹葉類의 化學的 成分, 消化率 및 攝取量에 미치는 影響 Ⅲ. The Effect of stage of maturity on the chemical composition, digestibility and feed intake of shrubby leaves

尹益錫,孟元在 건국대학교 1984 學術誌 Vol.28 No.2

1.硏究目的 및 重要性 山地의 雜灌木樹葉類는 放牧家畜에 採食되든지 또는 野草와 함께 베어져 給與되고 있다. 실제로 畜牛의 林間放牧 및 山地의 蹄耕草地造成에 있어서 灌木類 등 前植生을 제거하기 위한 播種前 放牧에서 相當量의 樹葉이 採食利用되고 있으므로 그의 飼料化와 草地造成 및 管理利用時 人力節減을 위하여 樹葉類의 飼料價値를 究明코자 한다. 2.硏究內容 및 範圍 참나무, 개암나무, 밤나무, 오리나무, 아카시아, 싸리나무 및 칡 등 7種의 雜灌木樹葉의 飼料價値를 究明코자 5, 6, 7, 9 및 10月의 5回에 걸쳐서 採取하여 成牝乳牛에 대한 生育時期別 採食量調査와 樹種別, 生育時期別 化學的 成分分析과 In Vitro 消化率을 測定하였다. 3.硏究結果 및 活用에 대한 建議 가. 硏究結果 (1) 供試 樹葉類의 粗蛋白質 含豊은 生育時期의 經過에 따라서 현저히 감소되었으며, 칡 및 아카시아의 粗蛋白質 含量은 높았다. (2) 供試樹葉類의 乾物消化率은 豆科 樹葉類가 높았으며 生育時期의 進行에 따른 減少傾向은 豆科 樹葉類에서 심하였다. (3) 乾物 및 纖維素의 消化率은 蛋白質含量이 높아질수록 비례적으로 증가되었다. (4) 供試樹葉類의 可消化蛋白質含量은 平均 11∼23%로 樹種間의 差異가 심하였고, 可消化에너지는 平均 1519∼2356 kcal/kg의 水準을 나타냈으며, 豆科 樹葉類가 다른 樹種에 비하여 높았다. (5) 各 樹葉의 相對採食率은 칡이 28.7%로 가장 높았고 오리나무가 2.1%로 가장 낮았으며, 時期別로는 7月의 採食量이 가장 적었다. 나.活用에 대한 建議 (1) 上記 硏究結果에 나타난 것과 같이 몇몇 樹葉은 그 飼料的 價値가 높고 採食量도 많기 때문에 雜灌木林地에 林間放牧을 장려하여 樹葉을 飼料資源化해야 할 것이다. (2) 草地造成에 앞서 雜灌木地에 家畜을 放牧시켜 雜灌木除去費用을 節減해야 할 것이다. The effect of stage of maturity of the native shrubby leaves grown in mountainous area on the nutritive value and fried intake in Holstein Cows were studied and the results were summarized as follows : 1.Crude protein content were ranged 15-28% in average. Crude protein was higher in leguminous leaves than others and decreased following advanced stage of maturity. Cell contents were ranged 31-43%, and higher in leguminous leaves than others. 2.Dry matter and cellulose digestibility of shrubby leaves were ranged 31-46% and 11-39% respectively and decreased following advanced stage of growth. 3.Dry matter and cellulose digestibility were higher in leaves having high crude protein content. 4.Digestible protein content was 11-23% in average. And digestible energy was ranged 1519-2356 kcal/kg and higher in leguminous leaves than others. 5.The relative intake index was the highest value as 28.7% in Pueraria thunbergiana and in the lowest as 2.1% in Alnus japonica. July was the lowest at the amount of intake in all experimental period.

통일을 대비한 북한의 초지개발 가능성과 전망 ( Possibilities and Prospects for Glassland Development Viewed in North Korea after Unification )

윤익석,이인덕,이형석 한국초지조사료학회 1997 한국초지조사료학회지 Vol.17 No.2

刈取頻度와 窟素施肥水準이 Sudangrass-Sorghum hybrid(S. bicolor×Sudanese)의 生育과 乾物生産에 미치는 影響

尹益錫 건국대학교 1983 學術誌 Vol.27 No.2

This experiment was carried out to determine the effects of cutting frequency and levels of nitrogen application on the growth and dry matter production of pioneer 988. The results are may be summarized as follows ; 1.The plant height of 2-1 increased linearly, but the 2-2 increased slightly after Aug.30 in C-2. The plant height was increased up to 4-3, but that of the 4-4 was poor in C-4. 2.Number of tillers increased with increasing the cutting frequencies. 3.Dead plant was greater with an increasing the cutting frequencies, and especially increased remarkably after the 4-2 in C-4. 4.Absolute growth rate (AGR) was increased with an increments of nitrogen application and growth progressed in two cutting systems. The highest value was obtained in 4-2, but the lowest value was in 4-4 under C-4, respectively. 5.Total dry matter yield was influenced markedly by culms in C-2, and by leaf blade in C-4, respectively. 6.Total dry matter yield in C-2 was slightly more advanced than that of C-4, and yields of C-2 were not significant defferences among nitrogen levels, but yields of C-4 increased with an increments of nitrogen fertilizer. 7.Crude protein for C-4 was considerably higher than that of C-2 in dry matter basis and nitrogen fertilization had very little effect on it in C-2 but a good effect in C-4. Other chemical compositions make little difference between nitrogen levels.

自然 草地의 草生 改良에 관한 硏究<第3報> : -Red Clover의 初期 生育에 미치는 燐酸의 效果 -

尹益錫 건국대학교 1968 學術誌 Vol.9 No.1

This experiment was carried out to study the effects of seven different levels of super-phosphate on the yeild and early growth of red clover. The results obtained are summarized as follows. ① Level of supply of super-phosphate had no effect on the germination of red clover. ② No appreciable growth has been detected when no phosphate was applied. Growth rate of toed clever of all treatment was almost nil after middle of October. ③ Rate of growth and the productivity were significantly increased as the level of phosphate increased. Linear relationships were found between dry matter content and height, and petiole length of Red clover. ④ Content of available phosphate has increased as the level of phosphate applied increased.

한국토양에 있어서 Ladino Clover의 시비에 관한 연구 : 인산 및 석회의 효과에 관하여 On the Effect of Phosphate and Calcium

윤익석 한국축산학회 1971 한국축산학회지 Vol.13 No.3