Background : The study is designed to select the organic fertilizer as an additional fertilizer suitable for improving the yield of ginseng cultivar K-1 at low productive land when it is cultivated as 6-year old red ginseng. Methods and Results : This study was conducted in 2016 at a farm in Paju cultivating 6-year old ginseng root. As for the management of the cultivation land, in 2010 and 2011, Sudangrass was cultivated in order to make the organic matter content and chemical composition suitable for ginseng cultivation, and more than 15 tillage works were carried out a year. The transplantation was carried out at the planting density of 63 weeks / 1.62 ㎡ in April 2012. On May 2, the amount of 15 ℓ / 1.62 ㎡ of N 1.5 ㎏/1,000 ㎡ was supplied to the non-treatment, liquid fertilizer of fermented rice bran, liquid fertilizer of fermented soybean, seaweed and liquid yeast. N 1.5 ㎏/1,000 ㎡ was put into the soil for the fermented soybean and leaf mold. The photosynthetic rate was measured on the middle part of the small leaf by using a photosynthetic analyzer (LI-6400, Li-COR) at 10 : 00 - 14 : 00 on a clear day under PAR (photosynthetically active radiation) of 100, 200, 400, 600, 800, 1,000, 1,400, 1,800 μmol s-1m-2. The growth features of ginseng (including the length of stem, length of leaf, width of leaf, length of root and yield, etc.) as well as leaf discoloration, and root rot, etc were examined. The statistical analysis was performed 3 times in the randomized block design. For the rate of photosynthesis, the liquid fertilizer of fermented rice bran > liquid fertilizer of fermented soybean ≒ untreated ≒ fermented soybean > seaweed > liquid yeast > leaf mold was higher in that order. The survival rate ranged from 42.9% to 51.9%. As for the above-ground growth characteristics, the liquid fertilizer of fermented rice bran, liquid fertilizer of fermented soybean, seaweed and liquid yeast showed higher performance than the non-treated while the fermented soybean and leaf mold showed similar performance to the non-treatment. As for the underground growth, the liquid fertilizer of fermented rice-bran, liquid fertilizer of fermented soybean, fermented soybean, or leaf mold showed the same performance as non-treatment while the fermented soybean or leaf mold showed shorter length than non-treatment. As for the yield, the liquid fertilizer of fermented rice-bran, or liquid fertilizer of fermented soybean showed better performance than non-treatment. Conclusion : In conclusion, it was found that liquid fertilizer of fermented rice bran and liquid fertilizer of fermented soybean are the suitable organic fertilizers which can be used in ginseng cultivation for improving the quantitative yield of 6-year-old ginseng in low-producing area.

경기지역의 콩 다수확 선도단지를 선정하여 경기지역에 적합한 다수확 품종과 각 지역의 작부체계 및 재배 매뉴얼 설정을 추진하였다. 대상지역은 경기 연천 단작지대 1개소, 양평 이모작지대 1개소 및 예비시험지 3개소를 선정하여 선도농가에 다수확품종을 보급하고, 재배매뉴얼을 보급하여 파종에서 수확 후 관리 및 병해충 방제 등을 교육하였다. 지역별 최대 수량은 연천군 연천읍에서 연풍콩이 328㎏/10a로 가장 많은 수량을 나타내었고, 양평 지평면에서는 강풍콩이 271㎏/10a로 가장 많은 수량을 나타내었다. 파주시 적성면에서는 우람콩이 비닐피복시 360kg/10a로 가장 많은 수량을 나타내었다. 중북부권 콩 작부체계 모형으로 콩 재배면적 6,293ha의 84%(5,281ha)가 단작형태로 재배를 하고 있었고, 단작형태 중 가장 많은 재배면적을 차지하는 곳은 연천, 파주, 화성 순으로 나타났다. 이모작형태는 감자+콩, 맥류+콩, 콩+채소 순이었으며, 감자+콩 재배가 1,012ha로 이모작 중 56%(568ha)를 차지하였으며, 콩+채소, 맥류+콩 및 기타형태의 이모작은 444ha로 전체적으로(또는 감자+콩) 이모작 재배면적은 안성에서 가장 많은 반면 맥류+콩 작부체계는 평택에서 가장 많이 이루어지고 있는 것으로 조사 되었다. 경기지역에서의 이모작 재배 문제점은 감자+콩 작부체계의 경우 감자 수확 후 6월 하순에서 7월 상순 콩 파종시 한발조건이 되면 재파, 3파를 시도하여도 활착이 잘 되지 않아 생육이 균일하지 않았고, 비닐 피복시 타공 구멍이 작으면, 물 부족으로 인해 유묘기에 자엽 및 생장부가 고사하는 문제점 등이 발생하여 금후 대책 연구가 필요한 것으로 나타났다.