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- W2375621291 abstract "The standing pool, biological and chemical properties of the forest floor in three subalpine bamboo communities in western Sichuan were studied in this paper . Results showed that the standing pool was in order of the bamboo-fir-spruce forest (46.3×10~3 kg/hm~2) bamboo-fir-spruce-birch forest (25.8×10~3 kg/hm~2) bamboo-birch forest (6.5×10~3 kg/hm~2) at first. At the same time, the pool (kg/hm~(2)) of elements was 553.14 (N), 54.63 (P), 164.75(K), 606.12 (Ca), 125.78 (Mg) for the bamboo-fir-spruce-birch forest, 269.45 (N), 23.61 (P), 96.31 (K), 367.04 (Ca), 79.08 (Mg) for the bamboo-fir-spruce-birch forest, and 68.69 (N), 7.73 (P), 27.64 (K), 21.66 (Ca), 11.45 (Mg) for the bamboo-birch forest. The order of elements was in sequence of Ca N K Mg P in the bamboo-fir-spruce forest and the bamboo-fir-spruce-birch forest, but N K Ca Mg P in the bamboo-birch forest. Secondly, the content of the organic matter (such as organic carbon, crude protein, crude fat, crude cellulose, free-nitrogen extracts and so on) in the different layers in the forest floor had the order of the litter layer (L) fermentation layer (F) humus layer (H) in the bamboo-fir-spruce forest and the bamboo-fir-spruce-birch forest, but the pool of the organic matter had H F L in both of the forests. The content and pool of the organic matter in the different layers of the forest floor were in order of L-F layer H layer in bamboo-birch forest. Furthermore, the average decomposed rates of the organic matter in the forest floor of the bamboo-birch forest, the bamboo-fir-spruce-birch forest and the bamboo-fir-spruce forest were 38.15%, 23.54%, 19.14% respectively. Thirdly, the quantities of microbes (Bacteria, Actinomyces, Fungi) and the activities of enzymes (such as acidphosphatases, proteinase, invertase, catalase, polyphenol oxidase and so on) in the forest floor were in order ofFLHin the bamboo-fir-spruce forest and the bamboo-fir-spruce-birch forest, but H L-F in the bamboo-birch forest. In a word, the results suggests that with the succession from the bamboo-birch forest to bamboo-fir-spruce-birch forest, finally to the bamboo-fir-spruce forest, the microbial quantity, the enzymatic activity and the average decomposed rate of the forest floor will decrease but the pool of the organic matter and the nutrient elements in the forest floor accumulate gradually, implying that the nutrient cycling rate decrease gradually over the succession processes." @default.
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- W2375621291 date "2004-01-01" @default.
- W2375621291 modified "2023-09-27" @default.
- W2375621291 title "Bio-chemical properties of the forest floor in subalpine bamboo communities in western Sichuan" @default.
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