植物生态学报 ›› 1995, Vol. 19 ›› Issue (3): 217-224.

• 论文 • 上一篇    下一篇

鼎湖山不同植被类型下土壤微生物养分的矿化

傅声雷,蚁伟民,丁明懋   

  • 发布日期:1995-03-10
  • 通讯作者: 傅声雷

Mineralization of Soil Microbial C, N, P and K in Different Vegetations Types at Dinghushan Biosphere Reserve

Fu Sheng-lei, Yi Wei-min, Ding Ming-mao   

  • Published:1995-03-10
  • Contact: Wang Qi-ji

摘要: 本研究测定了鼎湖山5种主要植被类型下土壤微生物养分的矿化值,结果表明:同一植被类型下,土壤微生物3种养分元素(氮、磷、钾)的矿化值大小不一,其顺序是:矿化氮(铵态氮+硝态氮)>矿化钾>矿化磷。同一种养分元素,不同植被类型下的矿化也有较大差异。5种植被类型下土壤微生物氮、磷、钾的矿化值范围分别为:20.24—33.36、2.01—3.86和8.88—18.35mg/kg(干土)。土壤微生物氮的矿化与土壤微生物生物量呈显著正相关,磷、钾的矿化与土壤微生物生物量无相关关系。不同植被类型下土壤微生物库养分贮量各不相同。碳,氮、磷和钾的贮量范围分别为:702.94—1150.58、93.72—155.53、10.95—20.27和34.03—70.35kg/ha,其平均贮量为:924.15±195.73,117.27±25.52,15.08±3.95和50.14±13.29kg/ha;分别占土壤库中有机碳、全氮、全磷和全钾的3.00±1.13、5.34±1.57、1.71±0.57和0.26±0.22%。5种植被类型中,季风常绿阔叶林的土壤微生物养分固定及其供应能力最强。

Abstract: The mineralization of soil microbial N, P and K varied withvegetation types, ranging from 20.24—33.36, 2.01—3.86 and 8.88--18.35mgkg dry soil, respectively.The amount of nitrogen mineralized from soil microbes wasclosely related to the biomass-C. The regression equation was y = 0.3761x+ 4.8455,r = 0.5519***(n = 60).The total C, N, P and K in soil microbial pool were 702.94—1150.58, 93.72—155.53, 10.95—20.27 and 34.03—70.35 kg·ha-1 the average values were 924.15+195.73, 117.27 + 25.52, 15.08+3.95 and 50.14+13.29 kg·ha-1 accounting for 3.00 + 1.13, 5.34 + 1.57,1.71+0.57 and 0.26 + 0.22% of the total soil C, N, P and K.The status of soil microbial pool nutrient in monsoon evergreen broadleaf forest was better compared with other vegetation types.