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KMID : 0380120010240020081
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Korean Journal of Ecology
2001 Volume.24 No. 2 p.81 ~ p.85
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Decay Rats and Changes of Nutrients during the Decomposition of Zizania latifolia
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Mun, Hyeong Tae
Jeong, Nam gung/Kim, Jeong Hee
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Abstract
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Decomposition of Zizania latifolia was investigated with litterbag method for 13 months from November in 1998 to December in 1999, at the fringe of stream at Boryeong, Chungnam Province in Korea. After 13 months, remaining mass of leaves, culms and rhizomes was 16.9, 14.7, and 10.1%, respectively. Mass loss of the rhizomes was higher than those of the leaves and culms. The decay rate of leaves, culms and rhizomes was 1.86, 2.00 and 2.36 per year, respectively. Initial concentration of N, P, K, Ca, and Mg of leaves, culms and rhizomes was 18.0, 14.5, 44.0 ㎎/g for N, 0.18, 0.12, 0.67 ㎎/g for P, 14.1, 14.2, 14.8 ㎎/g for K, 3.6, 1.5, 0.3 ㎎/g for Ca, 1.1, 0.5, 0.5 ㎎/g for Mg, respectively. Concentrations of N and P in rhizomes were higher than those in leaves and culms. Except for Mg in rhizomes, there was no immobilization period during the decomposition. Most of the N, P and Mg were lost during the first 3 months. In case of K and Ca, most were lost within 1 month.
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