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- W2367528156 abstract "Nutrient dynamics of decomposing leaf litter was studied in two 33-year-old plantations, Chinese fir (Cunninghamia lanceolata, CF) and Castanopsis kawakamii (CK), and compared with that of an adjacent natural forest of Castanopsis kawakamii (NF, ~150 year old) in Sanming, Fujian, China. During the decomposition, varying degree of initial increase followed by decrease of N concentrations was observed in leaf litter, while initial increase and then decrease of P concentration was only found in leaves of other tree species in the NF and Chinese fir needle. The concentrations of Ca and Mg increased in all leaves except for Chinese fir needle, whereas that of K decreased consistently. Using the model x_t=x_0e~(-kt), the decay constants of nutrients ranged from 0.678 to 4.088 for N (k_N), from 0.621 to 4.308 for P (k_P), from 1.408 to 4.421 for K (k_K), from 0.799 to 3.756 for Ca (k_(Ca)) and from 0.837 to 3.894 for Mg (k_(Mg)) respectively. The decay constants of nutrients during leaf-litter decomposition can be arranged in the sequence of k_Kk_Pk_Nk_(Mg)k_(Ca), except for leaf litter of Chinese fir where k_Kk_(Mg)k_(Ca)k_Nk_P. Annual nutrient release from decaying leaf litters in the three forests was N, 10.73～48.19 kg/(hm~2·a); P, 0.61～3.70 kg/(hm~2·a); K, 6.66～39.61 kg/(hm~2·a); Ca, 17.90~20.91 kg/(hm~2·a) and Mg, 3.21～9.85 kg/(hm~2·a) respectively. It was concluded that faster nutrient release of leaf litter and its greater amount in the natural broadleaved forest were beneficial to nutrient recycling and soil fertility maintenance than monoculture coniferous plantations." @default.
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- W2367528156 date "2004-01-01" @default.
- W2367528156 modified "2023-09-23" @default.
- W2367528156 title "Nutrient dynamics of decomposing leaf litter in natural and monoculture plantation forests of Castanopsis kawakamii in subtropical China" @default.
- W2367528156 hasPublicationYear "2004" @default.
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