This study evaluated the growth characteristics and forage productivity of quackgrass (Agropyron repens) and meadow foxtail (Alopecurus pratensis) as novel forage resources under abnormal climatic conditions in Cheonan, Chungcheongnam-do, South Korea, during the 2024–2025 growing seasons. Both species, sown on 26 September 2024, exhibited good establishment, vigorous pre-winter growth, and strong cold tolerance. Following harvest, quackgrass and meadow foxtail showed superior regrowth compared with orchardgrass and tall fescue. Dry matter yields of quackgrass (QG2), a mixed sward of meadow foxtail (50%) and quackgrass (50%), tall fescue and quackgrass (QG1) were 21.4, 20.4, 19.2 and 19.0 t ha⁻¹, respectively, with no significant differences among treatments. In contrast, the dry matter yield of meadow foxtail alone (18.4 t ha⁻¹) was significantly lower than that of quackgrass (QG2) (p<0.001). Crude protein contents of quackgrass and meadow foxtail (12.3% and 13.4%, respectively) were higher than that of tall fescue (11.9%), whereas total digestible nutrient contents ranged from 61.4% to 61.7%, slightly lower than those of tall fescue. These results suggest that quackgrass and meadow foxtail are promising forage species for mixed pasture systems to enhance adaptability to abnormal climatic conditions.

This experiment aimed to evaluate the growth characteristics and forage productivity of novel forage resources in order to cope with abnormal climatic conditions in Pungse-myeon, Cheonan City, Chungcheongnam-do, South Korea from 2024 to 2025. Italian ryegrass (IRG), Perennial ryegrass (PRG)+IRG mixtures and Meadow foxtail (MF)+IRG mixtures sown on 26 September 2024 grew vigorously before and after winter, and exhibited strong cold resistance, achieving a 100% overwintering rate. At harvest, plant length of IRG, PRG+IRG mixtures and MF+IRG mixtures reached approximately 118 cm. The heading dates of IRG and MF+IRG (2 May) were 8 days earlier than that of tall fescue. The dry matter yield (11.5 ton/ha) of IRG single pasture did not differ significantly from that of MF+IRG and PRG+IRG mixture, but was 29~30% higher than that of MF and PRG single pasture (p<0.001). The crude protein content of IRG and MF+IRG mixture was 7.0%, which was lower than that of MF (9.6%) and tall fescue (9.0%). The total digestible nutrient content of MF+IRG mixture was 63.2%, slightly lower than that of IRG but higher than that of tall fescue. In conclusion, these findings demonstrate that PRG+IRG and MF+IRG mixtures have strong potential as novel forage resources to mitigate cold damage of IRG under abnormal climatic conditions.

본 연구는 19세기 후반 일본 수로국이 작성한 ‘초기 한반도 해도’를 대상으로 그 제작 배경과 지도학적 특징을 분석하였다. 연구 대상은 1875년부터 1885년까지 일본 해군 수로국이 제작한 해도 23종 30매이다. 이 연구를 통해 일본 수로국의 성립과 변천 과정이 파악되었고, 조일수호조규(1876) 제7관 및 부록 제9관이 일본의 한반도 해안 측량을 합법화하는 근거가 되었음을 확인하였다. 특히 조약 체결 이전에도 일본이 부산항뿐 아니라 웅천만, 제물포, 강화도 염하 등에서 불법적으로 측량하여 해도를 제작한 사례가 존재함을 최초로 밝혀냈다. 아울러 ‘초기 한반도 해도’는 해군 작전 수행과 개항장 탐색이라는 군사적･경제 적 목적을 반영하여 작성된 것임을 확인하였다. 또한 해도에 기재된 내용은 ‘일본 해군 해도식’의 범례 사항이 반영되어 있음을 확인하였다. 이를 통해 1880년대에 이미 일본이 서구 해도를 단순 복제하는 수준을 넘어 독자적 기술을 바탕으로 해도를 제작하 고 있었으며, 한반도 주변 해역이 중요한 조사 대상지 중 하나였음을 알 수 있다.

본 연구는 한국 사회에서 영유아 사교육의 급속한 확산과 지역별 인프라 불균형 문제가 심화되는 현상에 주목하여, 유아 대상 학원 및 상담･치료센터의 지역별 분포와 상관성을 공간통계적으로 분석하였다. 전국 8,761개 사교육기관 중 66% 이상이 수도권 및 특광역시에 집중되어 있었으며, 특히 외국어학원의 공간적 편중이 두드러졌다. 상담･놀이치료센터 또한 특정 대도시와 인근 지역에 밀집하는 경향이 나타났다. 시군구 단위 인구 대비 기관 밀도, 비모수 상관계수, 공간적 자기상관 분석 결과, 유아 사교육 기관과 상담･치료센터의 분포는 통계적으로 유의미한 양의 상관관계를 보였으며, 특히 일부 대도시와 수도권 시군구에서 그 경향이 두드러졌다. 본 연구는 지역별 사교육 및 상담･돌봄 인프라 분포의 구조적 불균형을 밝히고, 영유아 교육 인프라와 상담 인프라의 상호 연계성을 밝힘으로써 균형 잡힌 교육 돌봄 인프라 구축을 위한 지역 맞춤형 정책 대응의 필요성을 실증적으로 제시하였다는 점에서 의의를 지닌다.

This experiment was carried out to study the effect of elapsed time after air flow cutoff on the germination rate of Italian ryegrass seed with different moisture contents during natural drying on reclaimed land, Jangheung and Kimje of Korea from 2023 to 2024, respectively. Seeds with moisture contents of 15.3, 22.3 and 28.0% were placed in vinyl bag (30 × 40 cm) at storage thicknesses of 10, 15, and 20 cm, and air flow was cutoff for 48 h. Seed moisture content, seed temperature (℃) and germination rate were investigated at 12-h intervals. After 48 h of airflow cutoff during natural drying, seed moisture content did not significantly differ among storage thickness treatment (p>0.05). When Italian ryegrass seeds with moisture contents of 27~28% were stored under conditions with air flow cutoff at 15~20cm thickness for 48 h, the seed temperature reached up to 30℃ and the germination rate was excellent at around 70~80%.

This experiment was carried out to evaluate the effect of natural drying methods on the moisture content and germination of Italian ryegrass seed in Jicheon reclaimed land, Jangheung, Korea, from 2023 to 2024. The natural drying methods tested included seed spread thicknesses of 2.5, 5.0 and 7.5 cm; seed reversal frequencies of 1, 2 and 3 times per day; and two reversal methods: seed-only reversal and complete mixing of seed with a dry mat. The thinner seed spread thickness significantly accelerated moisture content reduction(p<0.001). However, the reduction in moisture contents due to the number and method of seed reversal was minimal, approximately 1%. Seeds initially having around 48.9% moisture content required 2, 4 and 5 days to reach a moisture content of 14% when dried at spread thickness of 2.5, 5.0 and 7.5 cm, respectively. Seeds with an initial moisture content of 23-26% required 1 to 2 days to reach 14% moisture content while maintaining approximately 80% germination rate under the tested natural drying methods. When seeds with an initial moisture content of 48.9% were dried at a spread thickness of 2.5 cm, the germination rate was 74.6%, which was significantly lower than the 83.8 and 81.6% germination rates observed for seeds dried at 5.0 and 7.5 cm thickness, respectively(p<0.002). These results suggest that for faster drying and higher-quality Italian ryegrass seed, harvesting at 30% seed moisture content, utilizing the cultivation field as a seed drying place, and applying a seed spread thickness of 2.5 to 5.0 cm are optimal practices.

This study was conducted to investigate changes in the productivity of Italian ryegrass seeds according to the timing of harvest after heading in the southern region. The Italian ryegrass variety ‘Greencall’ was sown in Jinju, Gyeongsangnam-do, in the fall of 2022. Four harvest timings were tested (30, 40, 50, and 60 days after heading), with a randomized complete block design and three replicates. Sowing in the test plots took place on October 10, 2022, and harvesting was carried out from 30 days after heading on May 18 to 60 days. The plant height was the longest (99.1 cm) in the plot harvested 30 days after heading and decreased as the harvest was delayed. No significant differences were observed among treatments in terms of lodging resistance, disease resistance, and cold resistance. However, lodging severity increased over time after heading (7∼9). Disease incidence was also higher in plots harvested 50 and 60 days after heading. The length of the spike was shortest (38.76 cm) in the plot harvested 50 days after heading, and the number of seeds per spike was the lowest (42 seeds/spike) in the plot harvested 60 days after heading. The dry matter content of seeds increased with the delay in harvest, while dry matter yield decreased, with the lowest yield observed in the plot harvested 40 days after heading (3,031 kg/ha, p<0.05). The dry matter content of seed straw was highest at 75.73% in the plot harvested 50 days after heading and dropped to 34.99% 60 days after heading due to rainfall. The dry matter productivity of the seed straw was the lowest in the plot harvested 40 days after heading. The feed value of the seed straw also decreased with delayed harvest, with an average RFV (Relative Feed Value) of 91. In conclusion, the optimal harvest timing for fall-sown Italian ryegrass intended for seed production in the southern region appears to be 30 days after heading.

19세기 동안 ‘해가 지지 않는 나라’였던 영국은 해도 제작에 있어 가장 앞선 나라 중 하나였으며, 19세기 중반부터는 영국 수로국 제작 해도가 세계 표준해도로 인정받았다. 영국 해도상에 한반도와 주변 바다는 1855년부터 본격적으로 등장하였고, 해를 거듭하면서 점차 기재 정보가 확충되어 갔다. 이 연구는 1876년부터 1907년 까지 작성된 영국 해도 2347번에 나타난 한반도 해안선의 변화 및 지명 기재 양상을 1876년, 1885년, 1891년, 1907년에 작성된 총 4개의 해도에서 분석하였다. 분석 결과 해안선의 경우 1876년의 경우 평안도, 황해도, 전라도 등 서해안에서 집중적으로 변경되었고, 1885년의 경우 동해안 해안선이 동쪽으로 이동한 점, 1891년의 경우 전라도 및 충청도 해안에서 많은 변화가 확인되었다. 1907년에 이르러서는 해안선 이 현재의 해안선과 매우 유사함을 확인하여 완성 단계에 이르렀음을 확인하였다. 한편 한반도 및 주변 바다에 기재된 지명의 경우 기재된 지명의 개수가 1876년에 341개, 1885년에 415개, 1891년에 431개, 1907년에 244개로 변화하였음을 확인하였다. 해도인 까닭에 해안 지형과 관련되는 자연지명이 다수를 차지했지만, 인문지명의 비중도 적지 않았음을 확인하였다. 그러나 1907년 해도가 완성단계에 이르러서는 인문지명이 대폭 감소한 점 또한 특이점으로 확인되었다.

The experiment was conducted to determine the changes in seed productivity of Italian ryegrass (Lolium multiflorum Lam.) according to nitrogen fertilization levels in the southern region of Korea. Italian ryegrass (IRG) variety 'Green Call' was sown in the fall of 2021 in Jinju, Gyeongsangnam-do. The experiment consisted of three nitrogen fertilizer levels (100, 120, and 140 N kg/ha) with three replications using a randomized complete block design. Harvesting was done approximately 30 days after heading on May 18th. There was no difference in heading date among treatments, which occurred on April 18th. The longest IRG was observed in the 140 N kg/ha treatment, but there was no significant difference. No significant differences were observed in lodging, disease resistance, and cold tolerance among treatments, but lodging was severe in all treatments. The length of the spike averaged 44.95 cm, with no difference among treatments, and the number of seeds per spike was highest in the 120 N kg/ha treatment. Seed yield increased with increasing nitrogen fertilizer levels, averaging 3,707 kg/ha (as-fed basis). DM content of seed and straw averaged 76.95% and 62.19%, respectively, with no significant differences among treatments. The remaining straw after harvesting averaged 6,525 kg/ha on a dry matter basis, with the highest value observed in the 140 N kg/ha treatment. Overall, considering the results, the optimal nitrogen fertilizer application rate for seed production of Italian ryegrass in the southern region when sown in autumn was found to be 120 N kg/ha.

본 연구는 저출산 현상이 가속화 되고 있는 상황에서 임신･출산･육아 의료 서비스의 현황과 지역적 불균형을 탐색하되 행정구역 내 변이를 고려하여 분석하는 것을 목적으로 한다. 이를 위해 공간분석 단위를 세분화하여 행정구역 내에서도 의료기관의 접근성에 격차가 있는지를 확인하였다. 가임연령 여성 및 0~5세 인구를 수요로 간주하고, 임신･출산･육아를 진료 과목으로 하는 전문의 및 응급병상의 규모와 분포를 수요와의 공간적 배치를 고려한 공간적 접근성을 산출하였다. 분석 결과 수요에 비해 임신･출산 인프라의 지역간 공급이 불균등하게 분포하고 있음을 확인할 수 있었고 접근성이 취약한 지역은 특정 지역으로 수렴되는 것을 확인할 수 있었다.

This experiment was conducted to confirm the possibility of preparing Sorghum×sudangrass hybrid artificial hay using far-infrared rays in Korea. The machine used in this experiment is a drying device based on far-infrared rays, and is designed to control temperature, air flow rate, far-infrared radiation amount, and air flow speed. The Sorghum×sudangrass hybrids harvested in late September were wilted in the field for one day, and a drying test was performed on them. Conditions for drying were performed by selecting a total of 7 conditions, and each condition induced a change in radiation amount in a single condition (42%) and two steps (4 treatments) and three steps (2 treatments). The speed of the air flow in the device was fixed at 60 m/s, and the run time was changed to 30, 60, and 90 minutes. The average dry matter (DM) content was 82.84%. The DM content was 59.94 and 76.91%, respectively, in drying conditions 1 and 3, which were not suitable for hay. In terms of drying rate, it was significantly higher than 80% in the 5, 6 and 7 treatment, and power consumption was slightly high with an average of 5.7 kw/h. As for the feed value according to each drying condition, the crude protein (CP) content increased as the drying time increased, and there was no significant difference between treatments in ADF, NDF, IVDMD and TDN content. In terms of RFV, treatment 1, which is a single condition, was significantly lower than the complex condition. Through the above results, it was determined that the drying conditions 4 and 5 were the most advantageous when considering the drying speed, power consumption, and quality.

본 시험은 우리나라에서 원적외선을 이용한 이탈리안 라이그 라스 인공건초 조제 가능성을 확인하기 위해 수행되었다. 본 시험 에 사용된 기계는 온도, 송풍량, 원적외선 방사량을 조절할 수 있 는 원적외선 건조기로 5월에 수확한 이탈리안 라이그라스를 대상 으로 실시하였다. 건조를 위한 조건은 전체 9개의 조건을 선택하 여 수행하였으며 각각의 조건은 방사율 42∼45 %로 설정을 하였 으며 내부 온도는 65℃로 설정하였다. 기기내의 기류의 속도는 40 ∼60m/s로 하였으며, 전체적인 건조시간은 방사량 42%는 30분, 43%는 25분 그리고 45%는 20분으로 하여 수행하였다. 각각의 건조조건에 따른 최종 건물함량은 평균 88.5%로 나타났으며 전 처리에서 건초에 적합한 건물함량을 나타내었다. 건조 조건에 따 른 전력 소비량을 보면 45% 방사량에서 20분간을 건조한 처리구 에서 가장 낮게 나타났다. 건조율에 있어서는 1∼5번 건조 조건에 서는 차이가 없었으나 6∼7조건에서는 유의적으로 낮은 경향을 보였다. 사료가치에 있어서는 대부분의 건조조건에서 원물보다 CP, IVDMD는 높았고 ADF, NDF 함량은 낮게 나타났으며 대체 적으로 4, 7 및 8번 건조 조건에서 높은 경향을 보였다. 이상의 결과를 통하여 건조속도, 전력량, 품질 등을 고려할 때 7 및 8번 건조조건이 가장 유리한 것으로 판단되었다.

This experiment was conducted to investigate the change in the productivity of Italian ryegrass seeds according to the inter-row spacing in the southern region of the Korean Peninsula. Italian ryegrass (Lolium multiflorum Lam.) ‘Green Call’ variety was sown in Jinju, Gyeongnam in the fall of 2020 with three inter-row spacings (20, 30 and 40 cm). The experiment was arranged a randomized block design with three replications. The ryegrass was sown on October 17, 2020, and the harvest was on May 31, about 60 days from the first heading stage. There was no difference among treatments with an average of April 27th in heading stage. Plant height was significantly longer at 30 cm seeding interval and the shortest in 20 cm treatment. The length of the spike was the longest in the 40 cm seeding interval, and the number of seeds per spike was the highest in the 20cm seeding interval, but there was no significant difference among treatments. The seed yield was the highest at the 20 cm sowing interval (2,180 kg/ha), and decreased as the spacing increased. The dry matter content of seeds and straw was found to be 44.90% and 45.51% on average, and there was no significant difference among treatments. The amount of remaining straw after harvesting was found to be 7,506 kg/ha on average on DM basis, and was high at the 20 cm seeding interval. In view of the above results, it was found that it is most advantageous to sow at intervals of 20 cm when producing Italian ryegrass seeds through autumn sowing in the southern region.

This experiment was conducted to establish the technology for artificial hay preparation in Korea. Using far-infrared heater, a device that can control temperature, airflow, and far-infrared radiation was produced and conducted on the fourth harvested alfalfa. The drying conditions were carried out by selecting a total of four conditions. For each condition, the radiation rate was set to around 40% (33-42%), and the temperature was set at 58~65℃, and the speed of the airflow was fixed at 60m/s. The overall drying time was set to 30 min in the single and 60 min (30-30 min) and 90 min (30-30-30 min) in the complex condition, and the radiation rate and temperature were changed by time period. In the case of drying condition 1, the final dry matter (DM) content was 46.26%, which did not reach a DM suitable for hay. However, all of the alfalfa corresponding to the remaining drying conditions 2 to 7 showed a DM content of 80% or more, resulting in optimal alfalfa hay production. In power consumption according to the drying conditions, the second drying condition showed the lowest at 4.7 KW, and the remaining drying conditions were as high as 6.5 to 7.1 KW. The crude protein content was found to be high at an average of 25.91% and it showed the highest content in the 5th drying condition (26.93%) and the lowest value in the 6th drying condition (25.16%). The digestibility showed a high value with an average of 84.90%, and there was no significant difference among treatments (p>0.05). Considering the above results, it was judged that drying condition 2 was the most advantageous.

To investigate the domestic seed production potential of Italian ryegrass, it was sown in autumn in the southern region and harvested in the spring of the following year to investigate the productivity and quality of seeds and straw. Italian ryegrass (Lolium multiflorum Lam.) ‘GreenCall’ variety was sown in Jinju, Gyeongnam in the fall of 2020 with three seeding rates (20, 30 and 40 kg/ha). The experiment was arranged consisted of a randomized block design with three replications. The ryegrass was sown on October 17, 2020, and the harvest was on May 31, about 60 days from the heading stage. The heading stage of Italian ryegrass was April 28, and there was no difference among treatments. Plant height was significantly shorter in the 40 kg/ha seeding treatment group, and there was no significant difference in the remaining treatments. The resistance of lodging, disease, and cold did not show significant differences among treatments. Spike length and number of seeds per spike were highest at 20 kg/ha seeding amount, and there was no difference in the remaining treatments. The seed yield was the highest at 1,956 kg/ha in the 20 kg/ha seeding rate, and there was no difference in the 30 and 40 kg/ha seeding rates. The dry matter content of seeds and straws was 45.60 and 41.83% on average, and there was no significant difference among treatments. The amount of remaining straw after seed harvesting was found to be 7,689 kg/ha on average on a dry basis, and it was high in the 40 kg/ha sowing area, but there was no significant difference among treatments. According to the above results, it was found that it is most advantageous to sow at 20 kg/ha when producing Italian ryegrass seeds through autumn sowing in the southern region.

본 시험은 사료용 벼의 생산 및 이용 확대를 위해 한우에 대한 급여 효과를 규명하는 것을 목적으로 수행되었다. 경기도 평택에서 생산된 사료용 벼를 활용하여 TMR 사료를 조제하였고 한우 육성우 16두를 대상으로 29개월령까지의 생장능력과 육질특성 변화를 조사하였다. 생산된 사료용 벼 사일리지는 수분함량이 64.02%, 조단백질 함량이 7.54%로 나타났으며 육성기에는 약 45% 정도를 배합하였고 비육기(전기, 중기 및 후기)에는 각각 35, 15 및 9% 로 낮추어 배합하였다. 체중은 WCR-TMR 급여구가 비육중기와 후기에 대조구에 비해 유의적으로 무거웠고, 종료시(29개월령)는 대조구가 631 kg/head 였으나 WCR-TMR급여구는 647 kg/head 로 무거웠다. 일당증체는 육성기와 비육전기에 WCR-TMR급여구가 유의적으로 높았으며 비육중기 및 후기는 차이가 없었다. 전 기간에 있어서는 0.71 vs 0.75 kg/head/day 로 WCR-TMR급여구가 높게 나타났다. 육량에 있어서는 대조구의 등지방 두께(11.7 mm)가 WCR-TMR급여구(9.3 mm)보다 유의적으로 두껍게 나타났다(P<0.05). 등심단면적, 도체중 및 육량지수에서는 차이가 없었다. 육질에 있어서는 Marbling score가 WCR-TMR급여구에서 높게 나타났으며(P<0.05), 육색, 지방색, 조직감 및 성숙도에 있어서는 유의적인 차이가 나타나지 않았다. 이상의 결과를 종합하여 볼 때 사료용 벼 위주 TMR 급여는 가축의 생산성을 개선시켰으나 육질에 있어서는 큰 차이를 보이지 않았다. 따라서 조사료 사정이 열악한 나라에서는 사료용 벼의 생산 및 이용이 필요한 것으로 판단된다.

This study was conducted to investigate the effects of species and varieties of summer forage crops on growth characteristics and productivity in Sihwa reclaimed land. The summer forage crops used in the trial were silage corn, sorghum×sudangrass hybrid(SSH), and proso millet. For each forage species, Gwangpyeongok(GPO), P15453, P1952 and P2088 were used for silage corn, and 877F, Green star, Honey chew, and Turbo gold cultivars were used for SSH. For proso millet, Ibaekchal, Geumsilchal and Manhongchal developed by the National Institute of Crop Science were used. Silage corn and SSH were sown on May 21, 2019 and proso millet on June 4, and harvested on September 2. There was no significant difference in plant and ear height of silage corn among varieties. P1543 was the highest and P2088 was the lowest in yield of silage corn, but there was no significant difference among treatments. Among the SSH, the plant height of 877F was the highest and Turbo gold variety had the smallest (p<0.05). As for the dry matter(DM) yields, 877F had the highest at 3,862 kg/ha and Green star had the lowest at 2,669 kg/ha (p<0.05). The fresh matter yield of proso millet was 15,778 kg/ha, which was higher than that of corn or SSH, The average dry matter yield was 4,780 kg/ha, and Ibaekchal variety had the highest DM yield compared to other varieties (p<0.05). P2088 had the highest TDN content and GPO was the lowest (p<0.05). As for the SSH, the TDN content of Green star and Honey chew varieties was significantly higher, and the RFV value was the lowest in Turbo gold. The average crude protein content of proso millet was 7.03%, and the highest TDN and RFV values were 64.36% and 106 in Geumsilchal. In the experiment of the germination rate of summer forage crops according to salt concentration, silage corn showed a germination rate of 83.1% even at 0.4% salinity. In particular, P2088 and P1921 varieties had more than 80% germination rate even at 0.6% salt concentration. As for the SSH, the germination rate of 877F was 93.3% even at 0.8% salinity, and 88.3% with Honey chew, indicating higher resistance to salt concentration compared to other varieties. Proso millet showed a high germination rate of 84.0 to 88.7% even at a salt concentration of 0.6%. Considering the above results, proso millet was recommended as the most suitable forage crop species in the Sihwa reclaimed land with high salt concentration, and the Ibaekchal variety is recommended as a suitable forage crop due to its high yield.

자율주택정비사업은 노후저층주거지 개량을 위한 소규모주택정비사업의 유형 중 하나이다. 본 연구는 자율주택정비사업이 일부 지역에 편중되어 시행되는 점을 확인하고 현재까지 추진된 사업 세부내용의 지역별 차이를 비교 분석하고, 사업추진의 지역차 가 발생하는 원인을 설명할 수 있는 이론적 접근방법을 탐색하는 것이 목적이다. 이를 위해서 자율주택정비사업의 개념과 특성에 대해 살펴보고 자율주택정비사업 및 관련 분야에 대한 선행연구를 검토한 후, 2018년 이후 준공된 전국 자율주택정비사업 추진현황 을 지역별로 비교 검토하였다. 그 결과 사업 특성 중 사업면적, 사업성에 영향을 미치는 요인, 사업 소요기간이 지역별로 유의한 차이가 있다고 분석되었다. 이론적으로 이러한 지역 격차는 중앙정부의 정책을 지방정부의 도시관리자가 실현하는 과정에서 지역에 내재한 제약과 행위 특성이 반영된 결과로 해석할 수 있다. 연구결과는 향후 자율주택정비사업 활성화를 위한 법령 등을 개정할 때 직접적이고 실증적인 근거자료로 활용될 것으로 기대한다.

This experiment was conducted to compare the seed productivity of Spring sown Italian ryegrass(Lolium multiflorum Lam.) depending on the seeding rates(20kg/ha, 30kg/ha, 40kg/ha) in Gangwon region. The experiment was a randomized block design with three replications. The test plots were located in alpine areas of about 600 m above sea level in Gangwon province. The tested Italian ryegrass variety was ‘Greencall’ developed by the National Institute of Animal Science, RDA. Italian Ryegrass was sown on March 26, 2020, and the seed harvesting was on the 60th day(2 July) from heading date. The heading date was May 8 with no difference, There were no significant differences in the agronomic characteristics including plant height. 30kg/ha seed rate was the highest at 146.8 seed/spike and 40kg/ha seed rate was the lowest at 114.7 seed/spike for the number of seeds per spike. The number of spikes per unit area was the highest in 40kg/ha at 886/m2 and the lowest in 20kg/ha at 750/m2. The yield of seed and straw was the highest in 40kg/ha at 1,288kg/ha and 2,970kg/ha respectively, but there was no difference. From the above results, the production of Italian ryegrass seeds through spring sowing in the Gangwon region is not much than autumn seeding, requiring the input of various technologies to increase productivity in the future, and it is desirable to determine the production cost through economic analysis was evaluated.

This experiment was conducted to study on the growth characteristics and seed productivity of Italian ryegrass (Lolium multiflorum Lam., IRG) planted in the Spring in Gangwon Highland according to the seeding distance (20, 30 and 40 cm). The field was located in highland around 600 m above sea level. The experimental design was randomized block design with three replication and the tested IRG variety was ‘Greencall’ developed by National Institute of Animal Science (NIAS). IRG was sown on March 26, 2020, and harvested on July 2. The plant height was the shortest at 80.5 cm in the 40 cm seeding distance plot (P<0.05), and there was no significant difference between the 20 and 30 cm seeding distance. The number of spike per square meter (m2) was significantly higher in the 20 cm seeding distance plot than that of 40 cm (937 vs. 571). The dry matter (DM) content of seed and straw after harvesting was 49.70 and 33.36 % on average, and there was no significant difference between treatments (P>005). However, there was a significant difference in the fresh and DM yield of seeds and straw (P<0.05). DM yield of seeds was significantly higher in 20 cm distance than that of 40 cm, and the yield of straw was the same trend. On the other hand, there was no significant difference in DM yield between 20 cm and 30 cm and also in the feed value of straw after seed harvesting among seeding distance. The average CP, ADF, NDF, and TDN contents were 6.91, 36.76, 61.75 and 59.86%, respectively, and the RFV value was 91. Considering the above results, the production of Italian ryegrass seeds sown in the spring in the highlands of the Gangwon is lower than that of autumn sowing, but it is judged that it needs to be reviewed in case it is unavoidable. In the future, there should be an economic analysis and the development of technology that can increase production.