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Soil properties of cultivation sites for mountain-cultivated ginseng at local level
Choonsig Kim,Gap Chul Choo,Hyun Seo Cho,Jong Teak Lim 고려인삼학회 2015 Journal of Ginseng Research Vol.39 No.1
Background: Identifying suitable site for growing mountain-cultivated ginseng is a concern for ginsengproducers. This study was conducted to evaluate the soil properties of cultivation sites for mountaincultivatedginseng in Hamyang-gun, which is one of the most well-known areas for mountain-cultivatedginseng in Korea. Methods: The sampling plots from 30 sites were randomly selected on or near the center of the ginsenggrowing sites in July and August 2009. Soil samples for the soil properties analysis were collected fromthe top 20 cm at five randomly selected points. Results: Mountain-cultivated ginseng was grown in soils that varied greatly in soil properties onconiferous, mixed, and deciduous broad-leaved stand sites of elevations between > 200mand < 1,000 m. The soil bulk density was higher in Pinus densiflora than in Larix leptolepis stand sites and higher in the< 700-m sites than in > 700-m sites. Soil pH was unaffected by the type of stand sites (pH 4.35e4.55),whereas the high-elevation sites of > 700mwere strongly acidified, with pH 4.19. The organic carbon andtotal nitrogen content were lower in the P. densiflora stand sites than in the deciduous broad-leaved standsites. Available phosphorus was low in all of the stand sites. The exchangeable cationwas generally higherin the mixed and low-elevation sites than in the P. densiflora and high-elevation sites, respectively. Conclusion: These results indicate that mountain-cultivated ginseng in Korea is able to grow in veryacidic, nutrient-depleted forest soils.
( Choonsig Kim ) 한국산림과학회(구 한국임학회) 2019 한국산림과학회지 Vol.108 No.2
This study was conducted to determine the carbon (C) and nitrogen (N) distribution within tree components (i.e., stem, branches, leaves, and roots) of the Japanese larch (Larix kaempferi Carriere) plantation and natural oriental cork oak (Quercus variabilis Blume) stands. Fifteen Japanese larch and 15 oriental cork oak trees were destructively sampled to compare the C and N stocks in the components of the trees from three different regions―Hadong-gun, Hamyang-gun and Sancheong-gun―in Gyeongnam Province, South Korea. Species-specific allometric equations were developed to estimate the C and N contents in the tree components based on the diameter at breast height (DBH). There were differences in mean C and N concentrations between the Japanese larch and the oriental cork oak. The mean C concentrations of the tree componentswere significantly higher in Japanese larch than in oriental cork oak; whereas, the N concentration in the stems was significantly lower in Japanese larch than in oriental cork oak. The allometric equations developed for C and N content were significant (p < 0.05) with a coefficient of determination (R<sup>2</sup>) of 0.76 to 0.99. The C and N stocks in the tree components do not appear to be affected by the species such as Japanese larch plantations and oriental cork oak stands. This study emphasizes the importance of C and N concentrations to estimate the C and N distribution according to tree components in different tree species.
Soil properties of cultivation sites for mountain-cultivated ginseng at local level
Choonsig Kim,Gap Chul Choo,Hyun Seo Cho,Jong Teak Lim 고려인삼학회 2015 Journal of Ginseng Research Vol.39 No.3
Background: Identifying suitable site for growing mountain-cultivated ginseng is a concern for ginseng producers. This study was conducted to evaluate the soil properties of cultivation sites for mountain-cultivated ginseng in Hamyang-gun, which is one of the most well-known areas for mountain-cultivated ginseng in Korea. Methods: The sampling plots from 30 sites were randomly selected on or near the center of the ginseng growing sites in July and August 2009. Soil samples for the soil properties analysis were collected from the top 20 cm at five randomly selected points. Results: Mountain-cultivated ginseng was grown in soils that varied greatly in soil properties on coniferous, mixed, and deciduous broad-leaved stand sites of elevations between > 200mand < 1,000 m. The soil bulk density was higher in Pinus densiflora than in Larix leptolepis stand sites and higher in the 〈 700-m sites than in 〉 700-m sites. Soil pH was unaffected by the type of stand sites (pH 4.35-4.55), whereas the high-elevation sites of > 700mwere strongly acidified, with pH 4.19. The organic carbon and total nitrogen content were lower in the P. densiflora stand sites than in the deciduous broad-leaved stand sites. Available phosphorus was low in all of the stand sites. The exchangeable cationwas generally higher in the mixed and low-elevation sites than in the P. densiflora and high-elevation sites, respectively. Conclusion: These results indicate that mountain-cultivated ginseng in Korea is able to grow in very acidic, nutrient-depleted forest soils.
Soil properties of cultivation sites for mountain-cultivated ginseng at local level
Kim, Choonsig,Choo, Gap Chul,Cho, Hyun Seo,Lim, Jong Teak The Korean Society of Ginseng 2015 Journal of Ginseng Research Vol.39 No.1
Background: Identifying suitable site for growing mountain-cultivated ginseng is a concern for ginseng producers. This study was conducted to evaluate the soil properties of cultivation sites for mountain-cultivated ginseng in Hamyang-gun, which is one of the most well-known areas for mountain-cultivated ginseng in Korea. Methods: The sampling plots from 30 sites were randomly selected on or near the center of the ginseng growing sites in July and August 2009. Soil samples for the soil properties analysis were collected from the top 20 cm at five randomly selected points. Results: Mountain-cultivated ginseng was grown in soils that varied greatly in soil properties on coniferous, mixed, and deciduous broad-leaved stand sites of elevations between > 200mand < 1,000 m. The soil bulk density was higher in Pinus densiflora than in Larix leptolepis stand sites and higher in the < 700-m sites than in > 700-m sites. Soil pH was unaffected by the type of stand sites (pH 4.35-4.55), whereas the high-elevation sites of > 700mwere strongly acidified, with pH 4.19. The organic carbon and total nitrogen content were lower in the P. densiflora stand sites than in the deciduous broad-leaved stand sites. Available phosphorus was low in all of the stand sites. The exchangeable cationwas generally higher in the mixed and low-elevation sites than in the P. densiflora and high-elevation sites, respectively. Conclusion: These results indicate that mountain-cultivated ginseng in Korea is able to grow in very acidic, nutrient-depleted forest soils.
Effects of Fertilizer on Growth, Carbon and Nitrogen Responses of Foliage in a Red Pine Stand
Kim, Choonsig,Ju, Nam-Gyu,Lee, Hye-Yeon,Lee, Kwang-Soo Korean Society of Soil Science and Fertilizer 2013 한국토양비료학회지 Vol.46 No.1
This study was to examine growth, carbon and nitrogen responses in foliage following forest fertilization in a red pine stand. Two types of fertilizer (N:P:K=113:150:37 kg $ha^{-1}$; P:K=150:37 kg $ha^{-1}$) were applied on late April 2011. Growth, carbon and nitrogen responses of foliage were monitored 3 times (July, September, November) after fertilization. Morphological growth responses (dry mass, leaf area, specific leaf area) with foliage age were not significantly (P > 0.05) affected by fertilizer application, while needle dry mass and leaf area of July were significantly lower in current-year-old than in one-year-old or two-year-old needles of September or November. Carbon concentration and content in foliage was little affected by fertilizer application compared with sampling month or needle age, while the NPK fertilizer produced high nitrogen concentration and content of foliage. The results indicate that nitrogen concentration and content in foliage may serve as an indicator of the nitrogen status by fertilization in a red pine stand.
Short-term effects of fertilizer application on soil respiration in red pine stands
Kim, Choonsig,Jeong, Jaeyeob,Bolan, Nanthi S.,Naidu, Ravi The Ecological Society of Korea 2012 Journal of Ecology and Environment Vol.35 No.4
This study was conducted to evaluate the dynamics of soil respiration (total soil and heterotrophic respiration) following fertilizer application in red pine forests. Fertilizer (N:P:K = 113:150:37 kg/ha), which reflects current practices in Korean forest, was applied in April 2011, and total soil and heterotrophic respiration rates were monitored from April 2011 to March 2012. Monthly variation of total soil and heterotrophic respiration rates were similar between the fertilizer and control treatments, as soil temperature was the dominant factor controlling the both rates. Total soil respiration rates during the study period were not significantly different between the fertilizer (0.504 g $CO_2\;m^{-2}\;h^{-1}$) and control (0.501 g $CO_2\;m^{-2}\;h^{-1}$) treatments. However, the proportion of heterotrophic respiration was higher in the fertilizer (78% of total soil respiration rates) than in the control (62% of total soil respiration rates) treatments. These results suggest that current fertilizer practices in Korea forest soil do not substantially affect total soil respiration rates.