| Studies on soil micro biomass and organic acid under different vegetations |
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| DOI：10.7606/j.issn.1000-7601.2008.03.34 |
| Key Words: egetation type micro biomass organic acid |
| Author Name | Affiliation | | CHEN Xiaoyan | College of Resources ＆ Environment Northwest A ＆ F University,Yangling, Shannxi 712100, China | | L Jialong | College of Resources ＆ Environment Northwest A ＆ F University,Yangling, Shannxi 712100, China；State Key Laboratory of Soil Erosion and Dryland Farming， Yangling， Shannxi 712100， China | | ZHANG Hong | College of Resources ＆ Environment Northwest A ＆ F University,Yangling, Shannxi 712100, China | | WANG Juan | College of Resources ＆ Environment Northwest A ＆ F University,Yangling, Shannxi 712100, China | | MIAO Huitian | College of Resources ＆ Environment Northwest A ＆ F University,Yangling, Shannxi 712100, China |
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| Abstract: |
| Based on the secondary forest at Ziwuling in typical hilly-gully regions on the Loess Plateau the soil micro biomass and organic acid under different vegetation type were studied．The results showed that the soil micro biomass C was in the following order：farmland＞grassland＞arbor＞abandoned field ＞bush．There were downtrends in micro biomass N、P from arbor to farmland．Under different vegetation type the content of soil organic acid was basically in the order of arbor＞farmland＞grassland＞bush＞abandoned land．Correlation analysis indicated that there were positive correlations between soil microbial biomass N、P and organic acid and a rather weak correlation between soil microbial biomass N and organic acid. |
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