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KMID : 0368419770200030109
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Journal of Plant Biology
1977 Volume.20 No. 3 p.109 ~ p.118
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Distributions and Cyclings of Nitrogen, Phosphorus and Potassium in Korean Alder and Oak Stands
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Mun, Hyeong Tae/文炯泰
Kim, Choon Min/Kim, Joon Ho/金遵敏/金俊鎬
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Abstract
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Seasonal distribution of N, P and K, contents and their cycling were studied in Korean oak (Quercus acutissima): and Korean alder (Alnus sibirica) stands in central part of Korean peninsula. The amounts of three minerals were high in young leaves but gradually decreased with the process of leaf development in both stands. The amounts of minerals in the branches, trunks and roots were decreased in summer, however, they increased again in autumn. Seasonal changes of these minerals were not significant in the two stands. The amounts of phosphorus and potassium in plant and soil were higher in the oak stand than the alder one, but those of nitrogen were reversed. The amounts of minerals absorbed during one year were greater in the oak stand than tin the alder one, but those retuened into soil through mineralization of litter were less in the former than in the latter. The nutrient requirements of the oak stand were greater than the alders, but the cycling rate, the ratio of the amount of minerals absorbed to returned, was opposite.
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