Climatic change affects agricultural, environmental and livestock production. Forage productivity is highly dependent on the weather change. The Pyeongchang region has more difficulty in cultivation of Sorghum-Sudangrass hybrids (SSH) than other warm regions because of the cold weather. This experiment was carried out to analysis the agronomic characteristics, productivity, and nutritive value of three cultivars of Sorghum-Sudangrass hybrids in the Pyeongchang region from 2021 to 2022. Two harvests were taken in each year, and the agronomic characteristics, dry matter yield, and nutrient content of the whole SSH crops were determined. The plant height ranged between 281-291 cm and 165-172 cm in the first and second harvest, respectively. Plant height of Superdan (291±49 cm) was the highest in the first cut and Dairy mens Dream (172±30 cm) was the highest in the second cut time. Stem diameter ranged from 9.5 to 8.8 mm with Superdan having a higher level than the other two cultivars. The Dairy mens Dream variety produced significantly higher dry matter yield (15,695 kg/ha) than those of Superdan (14,584 kg/ha) and Supergreen (14,300 kg/ha) over a two-year experimental period. In terms of nutritional quality, the crude protein content, neutral detergent fiber and acid detergent fiber of SSH cultivars were analysed. There were no significant changes in the content of CP, ADF and NDF ranges among the cultivars. In addition, the Superdan cultivar had slightly higher CP content (10.17%) and was followed by Dairy mens Dream (9.84%) and Supergreen (9.54%) in the second cut time of 2-year average. Dairy mens dream had lower ADF and NDF values than other cultivars; however, no significant differences amongst cultivars in fiber content were observed. Therefore, these three cultivars displayed the potential growth characteristics, DM yield and nutritive values in Pyeongchang region. Hence, the SSH cultivars have a potential to withstand the climatic change and improve SSH productivity in the study area.

산양삼은 산림청 특별관리 임산물로 지정되어 관리되고 있지만 체계적인 연구 나 표준 재배지침이 현장의 재배 현실과는 상이한 부분이 많은 실정이다. 이에 본 연구에서는 평창지역의 산양삼 재배지 환경조건에 따른 진세노사이드 함량이 어 떠한가를 알아보기 위하여 산양삼 시료를 각각 10본씩 채취하여 실험을 통해 확 인하였다. 산양삼 입지환경은 경사, 사면 방향, 해발고, 나무 종류, 흉고 직경과 수 고 등 모두 6가지를 조사하여 국립산림과학원의 분류기준을 참고하여 침엽과 활 엽으로 구분하였다. 산양삼 재배지의 토양산도를 포함한 9가지 토양이화학성 분석 에서는 전체적으로 침엽지역보다 활엽지역에서 높은 함량을 보였다. 통계분석 결 과에서는 A, B, C, 재배지에서 침엽과 활엽지역 간 통계적 유의성이 있는 것으로 나타났으며, D 재배지는 침엽과 활엽지역의 유의차가 거의 없는 것으로 나타났다. 진세노사이드 함유량 분석 결과에서는 Re, Rb1, Rg1의 순서로 높은 함량을 나타 내고 있어서 평창 산양삼의 주성분을 확인할 수 있었다. 연구 결과로 산양삼은 산 삼이 잘 생육할 수 있는 환경과 비슷한 곳을 재배지로 선정하여야 고품질의 제품 을 생산할 수 있다고 예상할 수 있다. 향후 본 연구 결과가 임업인 소득증대에 도 움을 줄 수 있는 자료로도 활용될 수 있기를 기대한다.

In the Sosan reclamation land constructed by Hyundai Co,1984, the basic soil test and electric resistivity survey are carried out for the soft grounds around Tee and Kkot islands composed of tuffbreccia, and granite, respectively. The soil of soft grounds are classified as sandy clay(SC) and sandy silt(SM) in the Tee island, and as sandy silt(SM) in Kkot island according to the unified standard classification system. The vertical distribution of the electric resistivity is identified 4 layes with the value 30∼224 Ωm, 3∼59 Ωm, 0.15∼1.5 Ωm, 110∼1280 Ωm(Tee island:112∼122 Ωm, Kkot island:1260∼1283 Ωm), and the layers are interpreted as aeration layer, freshwater saturated layer, seaweater saturated layer, weathered layer, and basement rock respectively. The electric resistivity value decreases with increase of salinity, and pore water and clay mineral content.