钟国辉[1] 辛学兵[2]" /> 西藏色季拉山暗针叶林凋落物层化学性质研究
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西藏色季拉山暗针叶林凋落物层化学性质研究

钟国辉[1] 辛学兵[2]   

  1. [1]西藏农牧学院生物技术中心,林芝860000 [2]西藏高原生态研究所,林芝860000
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2004-01-18

  • Received:1900-01-01 Revised:1900-01-01 Online:2004-01-18

摘要: The storage and chemical properties of the forest litter in dark coniferous forest of Sejila Mountain were studied. The results showed that the existing storage was 5. 863t·hm^-2 and the annual litter fall was 0. 3205 t·hm^-2 It implied that the forest litter decomposed slowly and accumulated quickly, and the turnover of nutrient circles was slow. The contents of N, Ca, Na, and Mn nutrient elements in litter layer were in the order of un-decomposed layer (U layer) > semi-decomposed layer (S layer) > decomposed layer (D layer), those of K, Fe, and Mg were in the order of D layer > S layer > U layer, and P element content was in the order of U layer > D layer> S layer. The pool of elements was 78. 483 kg·hm^-2 N, 3. 843 kg·hm^-2P, 48. 205 kg·hm^-2 K, 23.115 kg·hm^-2 Ca, 13. 157 kg·hm^-2 Na, 30.554 kg·hm^-2 Fe, 2. 113 kg·hm^-2 Mn and 27. 513 kg·hm^-2 Mg. The turnover of forest litter was the total of nutrient release accumulation. K, Fe, and Mg were enriched, and N,Ca, Na, Mn, and P were released with the turnover rate in the order of N > Ca > Na > Mn >P.

关键词: 新西兰, 大型底栖无脊椎动物群落指数, 大型底栖无脊椎动物群落数量指数, 水质监测

Key words: New Zealand, macroinvertebrate community index, quantitative macroinvertebrate community index, water quality monitoring.