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| 望天树天然林土壤微生物生物量碳氮垂直分布及相关性分析 |
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施福军,黄则月,李婷,韦秋梅,杨 梅
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广西南宁良凤江国家森林公园,扬州市林业生产技术指导站,广西南宁良凤江国家森林公园,广西大学,广西大学
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| 摘要: |
| 选取广西田阳县望天树Parashorea chinensis 天然林、油茶Camellia oleifera 人工林及桉树Eucalyptus robusta 人工林为研究对象，通过氯仿熏蒸浸提法对微生物生物量C、N 以及诸因素的垂直变化进行了研究。研究结果表明：3 种林分土壤微生物生物量C、N 均随着土层深度显著下降(P<0.05)，其中不同林地0~10 cm 土壤微生物生物量C 差异最大，20~40 cm 土壤微生物生物量N 差异最大；0~10 cm 望天树天然林微生物生物量C 分别比油茶人工林、桉树人工林高1.41 倍、1.63 倍，20~40 cm 微生物生物量N分别比油茶人工林、桉树人工林高1.54 倍、2.87 倍。相关性分析表明，3 种林分微生物生物量C、N 均与土壤全氮、速效钾呈极显著(P<0.01) 的正相关。综上所述，目前，望天树天然林各土层土壤微生物生物量C、N 均保持在良好水平，土壤深度、土壤养分、林分组成等能对土壤微生物生物量碳氮产生显著影响。 |
| 关键词: 望天树 天然林 土壤微生物 生物量 相关因素 垂直分布 |
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| Vertical Changes of the Soil Microbial Biomass and the Correlation Analysis in Parashorea chinensis Natural Forest |
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SHI Fu-jun,HUANG Ze-yue,LI Ting,WEI Qiu-mei and YANG Mei
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Guangxi Nanning Liangfengjiang National Forest Park,Yangzhou Forestry Production Technology Guidance Station,Guangxi Nanning Liangfengjiang National Forest Park,College of Forestry,Guangxi University,College of Forestry,Guangxi University
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| Abstract: |
| In this paper, the soil microbial biomass and relative factors were studied of a natural forest of Parashorea chinensis (PF), planted forest of Camellia oleifera (CF) and planted forest of Eucalyptus robusta (EF) in Guangxi Tianyang by chloroform fumigation method. The results showed as follows. The microbial biomass C and N of 3 species of soil were significantly decreased with soil depth(P<0.05). The difference of soil microbial biomass C of 0-10 cm was the largest in 3 species and soil microbial biomass of 20-40 cm was the most significant difference. The microbial biomass C of 0-10 cm PF was1.41 times and 1.63 times that of CF,EF. The microbial biomass N of 20-40 cm PF was1.41 times and 1.63 times that of CF,EF. The correlation analysis showed that the microbial biomass C and N were positively correlated with total N and available K(P<0.01).To sum up,at present, the soil microbial biomass C and N of each soil layer in PF were maintained at good level. Soil depth, soil nurients and forest components had a significant effect on soli microbial biomass C and N. |
| Key words: P. chinensis naural forest soli microbial biomass related factors vertical changes |
