Decay Rate and Nutrients Dynamics during Decomposition of Oak Roots

Weight loss and nutrients dynamics during decomposition of oak roots (diameter classes:R1<0.2cm, 0.5cm<R2<1cm, 1cm<R3<2cm, 2cm<R4<4cm) (Quercus acutissima) were studied for 33-months in Kongju, Korea. After 33-months, decomposition rate of R1, R2, R3 and R4 was 49.6%, 47.5%, 66.4% and 66.1%, respectively. The decomposition constant(k) for R1, R2, R3, and R4 was 0.249/yr, 0.234/yr, 0.397/yr and 0.393/yr, respectively. Larger diameter class of the root lost more weight than smaller diameter class. N concentration in decomposing oak roots increased in all diameter classes. After 33-months, remaining N in R1, R2, R3 and R4 was 66.5%, 86.7%, 84.4% and 44.4%, respectively. P concentration in decomposing oak roots decreased in early part of decomposition and then increased in later stage of decomposition. After 33-months, remaining P in R1, R2, R3 and R4 was 64.7%, 62.4%, 93.1% and 30.7%, respectively. K concentration in decomposing oak roots decreased rapidly in early stage of decomposition. Remaining K in R1, R2, R3 and R4 was 11.6%, 10.6%, 5.9% and 7.7%, respectively. Ca concentration in decomposing oak roots showed different among diameter classes. After 33-months, remaining Ca in R1, R2, R3 and R4 was 66.2%, 51.0%, 39.1% and 48.3%, respectively. Initial concentration of Mg in oak root was higher in smaller diameter class. After 33-months, remaining Mg in R1, R2, R3 and R4 was 15.3%, 29.9%, 24.6% and 69.4%, respectively.

keywords: Decay rate, Decomposition constant, Nutrients, Quercus acutissima, Root decomposition, 분해상수, 분해율, 뿌리분해, 상수리나무, 영양염류

Reference

B. 1984. Decomposition of root litter and some factors regulatingthe process long-term root decomposition in Scots pineforest. Soil Biol. Biochem. 16,

B. and G. Agren. 1984. Decomposition of needle litter and itsorganic chemical components theory and field experiments.Long-term decomposition in a Scots pine forest Ⅲ. Can. J.Bot. 62,

decomposition and consumer activity in freshwater wetlands.Annu. Rev. Ecol. Syst. 12,

(2001.) . Decompositionand nitrogen release from decomposing woody roots in coniferousforests of the Pacific Northwest,

(2000.) . Effectsof temperature and moisture on C respired from decomposingwoody roots. ,

(2002.) . Fine-rootdecomposition and N dynamics in coniferous forests of thePacific Northwest,

G.E. Likens and F.H. Formann. 1973. Nutrients releasefrom decomposing leaf and branch litter in Hubbard Brookforest. New Hampshir. Ecol. Monogr. 43,

Jr. and K.W. Cummins.1986. Ecology of coarse woody debris in temperate ecosystems.Adv. Ecol. Res. No. 15. pp. 133-302.,

P.M. Latter and G. Howson. 1978. A study of the ratesof decomposition of organic matter. In . Production ecology of British Moors and MontaneGrasslands. pp. 136-459. Springer-Verlag,

10.

R.L. and K.S. Pregitzer. 1992. The demography of fineroots in a northern hardwood forest. Ecology 73,

11.

C.E. Meir and R.E. Campbell. 1985. Needle decompositionand nutrient release in Ponderosa pine ecosystem.Forest Sci. 3,

12.

(1998.) Decay rate and nutrients dynamics during wooddecomposition. , Kongju National University.

13.

J.D. Aber and J.M. Melillo. 1984. Decompositiondynamics of fine roots in forested ecosystems. Oikos 42,

14.

(2004) . Decay rate and nutrients dynamics during decompositionof oak branches. ,

15.

(2000.) Mass loss and changeof nutrients during the decomposition of Phragmittes communis.,

16.

(1998.) . Changes in mass and chemistryof plant roots during long-term decomposition on aChihuahuan Desert watershed. ,

17.

H. 1980. Spatial distribution of fine-root growth mortalityand decomposition in a young Scots pine stand in CentralSweden. Oikos 34,

18.

(2002) . .Weight loss and nutrients dynamics during the decompositionof fine roots.,

19.

(1979) F.J. and K. Cromack. 1980. The role of wood debris inforests and streams. In Fresh perspectives from ecosystemanalysis. Proceedings 40th Biology Collection, . Oregon State Univ. Press. Corvallis. pp. 171-190.

20.

turnoverand nutrient dynamics of above- and below-ground detritus ofworld forests. Adv. Ecol. Res. 15,

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Article Contents

Vol.27 No.3

Decay Rate and Nutrients Dynamics during Decomposition of Oak Roots

Abstract

Reference

Journal of Ecology and Environment