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作 者 ：傅声雷, 蚁伟民, 丁明懋

期 刊 ：植物生态学报 1995年 19卷 3期 页码：217-224

关键词：鼎湖山；土壤微生物；养分矿化；

Keywords:Dinghushan biosphere reserve Soil microbes, Nutrient mineralization,

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.

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