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Seasonal Change of Macro Nutrients Concentration in Acorns of Six Oak Species in Korea  

Hong, Yong-Sik (Department of Biology, Kongju National University)
You, Young-Han (Department of Biology, Kongju National University)
Yi, Hoon-Bok (Division of Environmental and Life Science, Seoul Women's University)
Publication Information
Korean Journal of Environment and Ecology / v.24, no.3, 2010 , pp. 286-292 More about this Journal
Abstract
Native oak tree species dominate the deciduous forests of South Korea. Although the acorns of these oak trees represent the main food source for many wildlife species, information pertaining to their nutrient composition and associated seasonal changes is limited. Thus, the objective of this study was to describe the seasonal changes in the acorn nutrient composition of six oak species in terms of nitrogen (N), phosphorus (P), calcium (Ca), magnesium (Mg), and sodium (Na) concentrations, Quercus acutissima, Q. aliena, Q. mongolica, Q. variabilis, Q. dentata, and Q. serrata. The results indicated that N concentrations of Q. aliena acorns were constant, whereas those of Q. dentata changed over the seasons. Those of Q. acutissima acorns were higher in summer and autumn but Q. mongolica acorns were higher in spring and summer. Q. serrata acorns were highest in autumn but Q. variabilis acorns were found to be the lowest in N concentration. P concentrations of acorns of six species tended to decline in the summer but increased in the spring and autumn. Ca and Mg concentrations showed an obvious trend of decline over the seasons for all species except Q. mongolica. Na concentrations of Q. aliena, Q. dentata, and Q. serrata acorns were constant over the seasons whereas those of Q. dentata tended to increase. Q. variabilis acorns were highest in autumn but Q. acutissima acorns were lowest in Na concentration. Overall, these results showed that acorn nutrient composition varies by season, and that the nature of the variability is largely species dependent.
Keywords
QUERCUS; WILDLIFE; FOOD; SEASON; NUTRIENT;
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Times Cited By KSCI : 2  (Citation Analysis)
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