Depletion of Phosphorus in Mountain Soil and Growth Stimulation of Panax ginseng by Phosphorus Enrichment

  • Choi, Yong-Eui (Division of Forest Resources, College of Forest and Environmental Sciences, Kangwon National University) ;
  • Yi, Myong-Jong (Division of Forest Resources, College of Forest and Environmental Sciences, Kangwon National University) ;
  • You, Kyung-Ha (Division of Forest Resources, College of Forest and Environmental Sciences, Kangwon National University) ;
  • Bae, Kee-Hwa (Division of Forest Resources, College of Forest and Environmental Sciences, Kangwon National University) ;
  • Han, Jung-Yeon (Division of Forest Resources, College of Forest and Environmental Sciences, Kangwon National University) ;
  • Yi, Jae-Seon (Division of Forest Resources, College of Forest and Environmental Sciences, Kangwon National University)
  • Received : 2009.01.19
  • Accepted : 2009.03.04
  • Published : 2009.04.30

Abstract

There are remarkable differences in growth and morphological characters of roots between mountain and field cultivated Panax ginseng. Growth of root in mountain cultivated ginseng was much slower than that of field cultivated ginseng. However, the factor affecting the retarded growth in mountain ginseng was not known. Soil analysis revealed that phosphorus (P) content of mountain soil was exceptionally low at least ten-fold lower compared to that of field soil. Thus, we suggest that low availability of P in mountain soil may be one of the limiting factors for growth of ginseng in mountain soil environment. We had monitored the growth of ginseng plants after one and three years of phosphate fertilizer application. Three kinds of phosphate fertilizers: fused magnesium phosphate, fused superphosphate, and single superphosphate were applied to mountain soil. Application of phosphate fertilizers increased the fresh-, dry weight, and diameter of ginseng roots and resulted in increased P accumulation in roots. These results demonstrate that slow growth of ginseng in mountain soil environment might be attributed to the low P content in mountain soil. Thus, analysis of P amount in mountain soil will be a good indicator for the selection of suitable site the ginseng cultivation in forest.

Keywords

Acknowledgement

Supported by : Korea Forest Service

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