논문 상세보기
Background : The first planted field is decreasing due to replant failure and climate change. As a result, there is an increasing number of cases where new soil is covered in agricultural land or clearing forest to cultivate ginsengs. In this case, it is essential to improve the chemical properties of the soil before ginseng site management. This study was carried out to investigate growth, quality of ginseng and soil chemical properties to set the concentrations of nitrogen.
Methods and Results : 0, 1, 4, 8, 16, 32 ㎏/10 a of urea were each treated at 3.3 ㎡ of the field and ginseng cultivar 'Gumpoong' was transplanted. Growth characteristics were investigated by growth period and soil chemical properties were investigated every 3 months. In 2-years-old ginseng, the root weight was the highest at 4 ㎏ treatment group of nitrogen while it showed the rate of increase in root weight is increased at 1 ㎏ treatment of nitrogen in 3-years-old ginseng. Physiological disorder and root rot symptom are increased at 8 ㎏ treatment group of nitrogen in 2- and 3-years-old ginseng. In case of soil properties, EC and Nitrate-N concentration exceeded 0.5 dS/m and 50 ㎎/㎏ respectively from 16 ㎏ treatment group of nitrogen after 14 months. The saponin content tended to decrease with increasing nitrogen treatment concentration at the 2-years-old ginseng. In the case of 3-years-old, the highest value was 0.88% at 1 ㎏ nitrogen treatment group.
Conclusion : These results indicate that the application levels of nitrogen influence growth, quality of ginseng and soil chemical properties. These data can be used to set the concentrations of nitrogen when new soil is covered in agricultural land or clearing forest to cultivate ginseng.
