This experiment was carried out to study the change of productivity and feed value in different types of hilly pasture. The pasture utilized in the experiment was placed on the experimental farm of Pyeongchang Campus of Seoul National University. Forage production type(FP; Orchardgrass 18 + Tall Fescue 12 + Timothy 5 + White clover 5 kg/ha) and Public farm type(PF: Orchardgrass 12 + Tall Fescue 18 + Timothy 5 + White clover 5 kg/ha) pasture were established in September 3, 2014 and utilized (cutting or grazing) four times every year. Growth characteristics, yield and forage quality were investigated for two years. Plant height of grasses was the highest in the 1st cutting and legumes was in the 2nd cutting. Dry matter (DM) content was highest at every the 1st cut grasses significantly lower at the 2nd harvest (p<0.05). However, there was no significant difference in the 2nd, 3rd and 4th harvest in 2016. In the botanical composition change, the portion of legume was gradually increased after pasture establishment and the ratio of weed and bare land was higher at 2nd and 3rd cutting, but it was decreased at 4th harvest. There was no significant difference in 2016 of fresh yield between two farm types (p>0.05). The yield of dry matter showed similar trend of fresh yield and forage production type was higher than that of public farm type (p<0.05). The forage intake by livestock was 1,452 kg/ha in 2015 and 1,743 kg/ha in 2016. Pasture utilization ratio of public farm type pasture was highest in the 3rd grazing time. Forage quality of pasture in relation to management type had not significant difference, but there was difference in harvest times. Crude protein (CP) was the lowest in the 1st harvest and total digestible nutrient (TDN) was highest in the 1st harvest and lowest in the 4th harvest. Based on the above results, it is found that the establishment of pasture suitable for farm’s situation is important for set up of Korean model of hilly pasture. Although the forage production type is superior on forage productivity, it is recommended that the results will be provided as basic data for management of public farm type in the future.

본 연구는 평창지역의 산지에서 목초 파종시기가 초지의 연차별 식생 및 생산성에 미치는 영향을 구명하고 평창지역의 산지초지 조성에 적합한 피종시기를 설정하고자 2015년 8월부터 2017년 10월까지 평창군에 위치한 서울대학교 국제농업기술대학원의 산지에서 수행되었다. 처리는 총 4처리로 T1: 8월 13일 파종 T2: 8월 27일 파종, T3: 9월 10일 파종, T4: 9월 24일 파종이었다. 월동 후 초지 식생구성을 보면 T1과 T2까지는 목초 식생비율이 98%이상으로 높은 식생밀도를 보였지만 T3이후부터는 급격하게 감소하였다. 분얼의 경우 T1과 T2에서 4.4개 이상으로 양호하였지만 T3이후에는 급격하게 감소하였다. 이러한 초기 월동률의 차이는 이후 목초의 식생 및 생산성에 큰 영향을 주었다. 연차별 식생변화를 보면 T1과 T2의 경우 목초 비율이 81%이상으로 우수하였지만 T4의 경우 상대적으로 불량하였다. 전체 건물 수량의 경우 T2와 T1이 각각 9,042 kg ha-1 와 8,845 kg-1 로 우수하게 나타났지만 T4의 경우 5,086 kg ha-1 로 건물 생산성이 상대적으로 낮게 나타났다. 결과를 종합해보면 평창지역에서 8월 말까지 파종을 완료 한 경우 목초 월동이 향상되었으며 이는 식생이나 생산성 측면에서 유리하게 나타났다.

본 시험은 남부지역 논에서 사료용 벼와 월동작물은 연계하여 연간 생산성을 비교하기 위하여 수행하였다. 사료용 벼는 국립식량과학원에서 육성된 수원 605호, 영우, 목우 품종을 이용하였으며 월동작물로 호밀(곡우), IRG(그린팜) 그리고 트리티케일(조성)을 이용하였다. 각각의 작물은 표준재배법을 이용하여 재배하였으며 사료용 벼의 수확은 품종별로 출수 약 30일후에 실시하였다. 월동사료작물의 초장은 호밀이 가장 컸으며 파종시기가 늦어짐에 따라 커지는 것으로 나타났다. 건물함량은 이탈리안라이그라스가 가장 낮았으며 트리티케일이 평균 29.4%로 가장 높았다. 건물 수량은 호밀이 가장 높았으며 이탈리안라이그라스와 트리티케일은 유의적인 차이가 없었다. 사료가치는 파종시기에 따른 차이는 없었으나 초종간에는 차이가 있었다. 특히 호밀은 다른 초종에 비해 CP, IVDMD, TDN 및 RFV 수치가 낮게 나타났다. 사료용 벼 출수기는 수원 605호가 가장 빨랐으며 목우가 가장 늦었다. 건물함량은 목우가 유의적으로 낮게 나타났으나 건물생산량은 평균 18,484kg/ha로 품종간의 유의적인 차이는 없었다. 사료가치에 있어는 목우의 조단백질 함량이 유의적으로 낮게 나타났으며 TDN 및 RFV 값은 목우가 가장 높았다. 연간 생산성 평가에 있어서는 호밀-수원 605호가 86,741kg/ha로 가장 높은 생초수량을 나타내었으며 건물수량도 26,515kg/ha로 가장 높았다. 트리티케일과 IRG도 수원 605와의 작부체계시 건물 및 TDN 생산성이 높았다. 이상의 결과를 종합하여 볼 때 남부지역에서의 사료용 벼를 이용한 연중 사료작물 생산체계시 수원 605호와 호밀 (곡우) 조합이 가장 우수한 것으로 판단되었다.

아르고노트섬에 대한 기존 연구는 영국의 상선 아르고노트호가 1791년 여름 울릉도 부근 해상에서 섬을 발견한 것에 관한 기본적인 정보를 밝히는 수준에 머물렀는데, 이 연구는 의문의 섬 아르고노트를 발견한 영국 탐험가 제임스 콜넷의 생애, 세계일주 배경과 항해 경로, 아르고노트호의 동해진출 배경과 의문의 섬의 발견 과정을 구체적으로 밝히는 것이 목적이다. 연구결과, 첫째, 콜넷의 2차 해달 모피 무역 항해는 북서 태평양 해안의 모피 무역 중심지였던 누트카에 영구적인 거점을 마련하는 동시에 모피를 중국에 판매하는 것이 목적이었으며, 둘째, 콜넷 선단이 해달 모피를 싣고 마카오로 들어가던 무렵, 중국 정부가 모피 무역 금지령을 내림에 따라 콜넷 일행은 새로운 판로를 개척하기 위해 조선과 일본으로 눈을 돌리게 되었다. 셋째, 조선과 일본에 접촉을 시도하였 으나 별다른 성과를 거두지 못하였으며, 또 다른 판로를 찾기 위해 조선의 동해안을 따라 북상하다가 울릉도 부근 해상에서 발견했다 는 ‘의문의 섬’은 서구의 지도제작에 반영되어 반세기 이상 전파·유통되었다. 넷째, 1798년 지도에는 아르고노트호가 악천후를 만나 방향타가 부러진 지점만 표현되었는데, 1811년 지도에는 실존하는 섬으로서의 아르고노트가 표현되기 시작하였다. 결과적으 로, 19세기 중엽 일본 해군성이 영국에서 제작된 해도를 모사하는 과정에서 일본은 그들이 전통적으로 인식하고 있던 다케시마(울릉 도)와 마쓰시마(독도)를 아르고노트와 다즐레에 비정함에 따라 일본식 독도명칭이었던 마쓰시마는 울릉도를 가리키는 결과를 초래하였다.

19세기 이래 영미권에서는 근대적인 역사지도집이 다수 제작되었고, 현재까지도 그 전통이 유지되고 있다. 이 결과 영미권에서 발간되는 역사지도집은 한국을 포함한 다수의 국가에서 역사지도집 발간 시 주요한 참고자료로 활용되고 있다. 그러나 이들 역사지도집은 세계적인 명성에도 불구하고 적지 않은 지도학적 및 역사지리학적 문제점을 가지고 있다. 본 연구에서는 대표적인 영미권 내 역사지도집인 ｢더 타임스 세계 역사지도집｣ 과 ｢돌링 킨더슬리 세계 역사지도집｣ 내에 수록된 동북아시아 지역 관련 역사지도들을 대상으로 지도학적, 역사지리학적 분석을 통해 문제점을 확인 하였다. 분석 결과 지도학적으로는 축척, 방위 등 지도학적 기본 요소의 부재, 해안선 및 하천 등 지형요소의 부적절한 표현, 국경선 표시의 부적절함, 한반도 형태의 부자연스러운 점 등의 문제점이 발견되었다. 아울러 역사지리학적으로는 한군현의 과도한 영역표시, 발해 명칭 표기 문제, 한반도의 중국 영토 표시 문제 등이 확인되었다. 한편 독도는 1993년 남북한 유엔 동시 가입 이후 분쟁지역이라는 표시가 사라지면서 지도상에 표시되지 않고 있음이 파악되었고, 동해표기는 예외적인 경우를 제외하고 병기가 이루어지고 있음이 확인되었다.

This study was conducted to explore the effects of seeding rate of a seed mixture on grassland productivity and botanical composition. Seeding rates were composed of four different treatments varying by the amount of seed: T1, 50% decrease in seeding rate from standard; T2, standard seeding rate; T3, 50% increase in seeding rate from standard; and T4, 100% increase in seeding rate from standard. In 2016, seasonal changes in grass botanical composition revealed T2, T3, and T4 in portion of grass ratio were the highest with a range of 87–100%, whereas T1 was the lowest of all treatments. In 2017, the botanical composition in T1 showed that the grass ratio in of the first cutting was 91%, but in the fourth cutting its ratio decreased by 75%. The results from both years were combined for each treatment, T4 (11,435 kg ha-1) and T3 (11,162 kg ha-1) demonstrated the highest dry matter yield of the treatments (T1: 8,196 kg ha-1; T2: 9,521 kg ha-1) (p＜0.05). As a result, a 50–100% increase in the seeding rate from the standard demonstrated the best grassland yield and botanical composition.

This experiment was carried out to determine the effect of organic fertilizer and seed mixture on productivity, botanical composition and forage quality in middle areas(Geumsan, 250m sea level) pasture. Total six experimental pastures (orchardgrass, timothy and tall fescue based seed mixture and with or without organic fertilizer) were established in autumn, 2014 and evaluated productivity and agronomic characteristics from 2015 to 2016. Plant heigh was higher in orchardgrass based mixture and orchardgrass and tall fescue based mixture were higher in 2nd harvest. There was not found the significant difference among treatment(P<0.05) in dry matter (DM) content. Botanical composition in 1st harvest was higher weed portion in orchardgrass based mixture and legumes was disappeared at 3rd harvest in all treatments. Fresh and dry matter yield was higher in 2nd year than 1st year. In 1st year, orchardgrass based mixture with organic fertilizer plot was the highest(P<0.05) DM yield, but tall fescue based mixture with organic fertilizer was the highest in 2nd year. Content of crude protein (CP) was the highest in tall fescue based mixture and Timothy based mixture showed low in ADF (acid detergent fiber) and NDF (neutral detergent fiber) content. But the content if in virto dry matter digestibility was higher than others. In 2nd year, the nutritive value of 2nd and 4th harvested grasses were higher and average RFV (relative feed value) value was the highest at 4th harvest. According to this result, orchardgrass and tall fescue based mixture would be recommendable for farm who considering productivity and timothy based mixture would be recommendable for considering forage quality in middle areas of Korea.

This experiment was conducted to comparison study on the productivity for certified varieties of import adaptability of silage corn in Pyeongchang area. Total eight varieties (Gangpyeongok, 31N27, 32P75, 32W86, P3156, P3394, DK 689 및 DK 729) were evaluated. The experimental design was 8 treatment of randomized block with three replications. Corn varieties were cultivated in experimental field of Pyeongchang campus, SNU from 1 May to 2 September, 2015 and plot size was 15㎡. Plant height of 32W86 and ear height of Gwanpyeongok was the highest (p<0.05). Tasseling and silking date was 27 July-3 August and silking occurred after 1-3 day of tasseling. Average day to silking was 92 days and that of 31N27 variety was short (p<0.05). The varieties of DeKalbo Company (DK 689 and DK 729) required more times to silking. Average GDD (growth degree day) of eight varieties was 1,023℃ and P3352 was the lowest GDD. In the trials of resistance evaluation, P3394 was strong in disease, P3156 was the highest in insect. All varieties did not show the lodging and variety of DK 729 showed the highest stay green score (p<0.05). Average dry matter content was 30.77%, it showed higher trend in DM. 32W86 was the highest DM content among the varieties, but there was no significant difference among varieties (p>0.05). The weight per ear was the highest in 32W86 and the lowest in Gwanpyeongok. The ration of ear to whole plant was higher in 32W86 and P3394, but it was not found the significant difference (p>0.05). Average yield of fresh and DM was 59,017 and 13,476 kg/ha, respectively. DK 689 showed higher DM and TDN yield than others, but there was not significant difference (p>0.05). According to results, the difference of productivity was not found among certified variety of import adaptability of silage corn. The varieties Gwanpyeongok, 32W86 and 32P75 would be recommendable in Pyeongchang area for stable cultivation.

This study was conducted to find out the effects of over seeding using new grass varieties orchardgrass ‘Kordione’ and ‘Onnuri’, and tall fescue ‘Greenmaster’ on botanical composition and dry matter productivity from 2013 to 2016 in low productivity hilly pasture, middle area of Korea. There were used 3 grass seed mixture types made of different compositions and amounts {T1: control - no over seeding, T2: tall fescue (TF) ‘Greenmaster’ 18 kg ha-1, orchardgrass (OG) ‘Kordione’ 9 kg ha-1, Perennial ryegrass (PRG) ‘Linn’ 5 kg ha-1, and Kentucky bluegrass (KBG) ‘Kenblue’ 2 kg ha-1, T3: TF ‘Greenmaster’ 9 kg ha-1, OG ‘Kordione’ 18 kg ha-1, PRG ‘Linn’ 5 kg ha-1, and KBG ‘ Kenblue’ 2 kg ha-1, T4: TF ‘Greenmaster’ 9 kg ha-1, OG ‘Onnuri’ 18 kg ha-1, PRG ‘Linn’ 5 kg ha-1, and KBG ‘Kenblue’ 2 kg ha-1}. In the botanical composition of grassland, T1 nearly remained constant in other seasons while ratio of weeds were increased in summer season. T2 was better than control (T1) in portion of grass ratio, which has increased by 80%. In the early time of establishment, the portions of OG were increased in T2, but TF rate was increased after 3 years later when grass was established. T3 and T4 showed a very similar patterns, grass ratio had increased by 80% and the portion of KBG had increased as time passed. T2 (129,763 kg ha-1) was showed the highest dry matter yield than other treatments (T1: 6,756 kg ha-1, T3: 9641, and T4: 10,738) in 2016.

The objective of this study was to determine the effect of the moisture content and pellet mill type on the physical and chemical characteristics of Italian ryegrass (IRG) pellet. Moisture content of raw material significantly (p<0.05) affected IRG pellet formation. Moisture content at 25% was the best condition for IRG pellet formation in terms of shape, power load and temperature changes. The hardness of pellet was decreased when moisture content was increase. However, the hardness of pellet was not affected by pellet mill type. Moisture content at 30% dramatically (p<0.05) decreased the durability compared to moisture content at 25%. Dry matter content of IRG pellet was increased (p<0.05) after pelleting. Total count of microorganism was decreased in pellet due to pressure heat and moisture losses during the pelleting process. These results indicated that the proper moisture content of Italian ryegrass pelleting would be at 25%. In addition, Roll & flat die type would be more suitable than Ring die and Die & flat die type in IRG pelleting. Pelleting works would be beneficial for improving forage quality and long storage.

상업용 부동산에 대한 관심에 비해 투자자가 활용할 수 있는 유용한 정보가 부족하다. 본 연구는 투자정보로서 층별 효용비율의 활용 가능성을 확인하고자 한다. 층별 효용비율은 건물의 수직적 이용에 따라 나타날 수 있는 효용의 상대적인 차이를 수치화한 것으로 상업용 부동산은 1층의 임대료나 가격 대비 비교 층 값의 비율로 표현한다. 이와 관련한 상업용 부동산에 대한 기존 연구는 대부분 임대료 산정에 초점을 두어 가격 변동 여력 등 다양한 투자정보로 활용하기 어려운 한계가 있다. 본 연구는 상권 특성 분석과 동향 탐색을 위하여 임대료 층별 효용비율뿐만 아니라 자산가치 및 투자수익률의 층별 효용비율을 활용한다. 분석결과 제시된 층별 효용비를 개별적 또는 통합하여 비교 분석함으로써 상권 활성도, 업무 및 매장 중심 여부 등 상권의 특성 파악과 향후 변동 추이를 효율적으로 예측할 수 있는 도구로 이용할 수 있을 것으로 파악되었다.

21세기 들어서서 개인용 컴퓨터 및 그래픽 프로그램 이용의 확산과 함께 비전문가에 의한 지도 제작이 증가하고 있다. 특히 한국의 역사지도의 경우 역사학자와 일러스트레이터가 협업을 한 형태의 지도 제작이 다수를 이루고 있다. 지도 이용의 확대라는 측면에서는 긍정적일 수 있으나, 지도학적 요건이 갖추어지지 않은 부정확한 지도가 무분별하게 확대 재생산될 가능성이 높다. 본 연구에서는 지난 8년간 역사학자들이 중심이 되어 제작한 ‘동북아역사지도’를 역사지도 평가 기준안을 개발하고, 이에 따라 분석하였다. 그 결과 투영법, 도곽 범위 및 축척, 고도와 수심의 표현, 기호와 범례, 지도 가독성, 대한민국의 위치 ․크기 ․형태 ․범위의 적절성 등의 지도학적 원칙이 지켜지지 않았으며, 지명의 한글표기, 독도 ․동해 표기 등의 원칙도 지켜지지 않았다. 이러한 문제점이 해결되기 위해서는 역사지도 제작시 준수되어야 할 지도제작 원칙이 시급히 마련되어야 한다.

This study amied to determine the effect of species and seed mixture on productivity, botanical composition and forage quality in middle mountainous region (Geosan) pasture. Total seven experimental pastures (T1 : Orchardgrass, T2 : Timothy, T3 : Tall fescue, T4 : Perennial ryegrass, T5 : Kentucky bluegrass, T6 : Timothy + Orchardgrass + Tall fescue + Alfalfa, T7 : Timothy + Orchardgrass + Kentucky bluegrass + White clover) were established in autumn, 2014 and evaluated for productivity and agronomic characteristics for 2015. Plant heigh was high in Orchardgrass and Perennial ryegrass pasture. Dry matter (DM) content was high in Kentucky bluegrass. Botanical composition in 1st harvest was high in shrub, but the grass composition was high in 2nd and 3rd harvest. Fresh and DM yield were higher in Orchardgrass and Perennial ryegrass (p<0.05); whreras, Kentucky bluegrass was the lowest. In seed mixture pasture, yields of T6 plot (Tall fescue) were higher than those of T7 (Kentucky bluegrass). Average CP (crude protein) content of 2nd and 3rd cutting time was 16.91 and 14.79%, respectively and Kentucky blue grass was the highest in 3rd cutting time by 17.57%. IVDMD (in vitro dry matter digestibility) showed low in 1st cutting and Kentucky bluegrass was the lowest in every cutting time. TDN (total digestible nutrient) content was the highest in 3rd cutting and the lowest in 1st cutting. These results indicated that Orchardgrass, Perennial ryegrass and T6 are recommendable for productivity and Timothy, Perennial ryegrass and T7 are recommendable for forage quality.

This study was conducted to find out the effects of Improvement of Botanical Composition Technology (IBCT) on the forage production and ecological characteristics in a Rumex acetosella-dominated hilly pasture in Pyeongchang, in a period from August 2013 to the end of growing season in October 2015. 2MT ha－1 limestone was applied in August 2013 and April 2014. Liming significantly increased soil pH from 4.69 to 5.47 and then the soil pH consistently hovered at 4.91~4.98. For every grazing time, plant height was found to be higher with the application of IBCT as compared with the control. After grazing, no significant difference in plant height was found between the IBCT group and the control. Changes in the botanical composition of grassland can be affected by a lot of circumstances, but application of IBCT decreased Rumex acetosella from 12% to 2%, while also increasing the proportion of pasture. In relation to the botanical composition of grass, orchardgrass and timothy showed the highest percentages throughout the whole study period. The proportion of Kentucky bluegrass increased over time while tall fescue steadily decreased. The totals for grazing days were 58 in 2014 and 55 in 2015. Average herbage dry matter intake was 7,848 kg ha－1 in 2014 and 6,941 kg ha－1 in 2015. Due to the application of IBCT, dry matter productivity showed a significant increase of 59% during the first grazing period in 2014 (3,437 kg ha and 5,460 kg ha in control and IBCT). In 2015, the total dry matter yield of the IBCT group was 51% greater than the control (5,742 kg ha－1 and 8,685 kg ha－1 in control and IBCT). Under acidic soil conditions, red sorrel can grow more strongly than grasses because it has better tolerance in dry and acidic conditions. Therefore, constant management is required in order to keep red sorrel from dominating the hilly pasture. In this study, the application of IBCT was able to effectively control weeds at all points. As a result, total management, including improvement of soil, overseeding, and application of selective herbicide and fertilizer, is needed to maintain excellent grassland conditions due to the limiting effects of environmental factors on grassland productivity.

The objective of this study was to determine the effect of moisture content on the physical and chemical characteristics of Italian ryegrass cube. Cube quality according to moisture contents (15, 20, 25, and 30%) was determined. Cubes made with 15 to 20% moisture showed a little cracks. But, the amount of powder generate from these cubes were lower by 10 to 16% compared to other cubes made with 25 to 30% moisture contents. The highest hardness at 159 kg/f was obtained when the cube was made with 15% moisture content and the lowest was 70 kg/f when the cube was made with 30% moisture content. The electrical loading and surface temperature were increased when moisture content was decreased. The chemical compositions of cube were differ from those of raw materials. Crude protein (CP) and ether extract (EE) contents were increased after cubing works. However, crude fiber (CF), acid detergent fiber (ADF), and neutral detergent fiber (NDF) contents were decreased after cubing. The crude ash content was not significantly (p > 0.05) different between raw material and cube. Higher moisture content resulted in higher crude protein content. However, crude fiber and crude ash content were not significantly (p > 0.05) different between each other. The contents of ADF and NDF were the lowest in cubes made with 30% moisture content. Our results suggest that the proper moisture content of Italian ryegrass cubing is recommended to be 15 to 20% and that cubing works should help increase forage quality.