十万大山地区典型次生阔叶林土壤微生物数量及酶活性的季节动态

为了评价广西十万大山南麓次生阔叶林土壤质量的变化,该研究以广西十万大山南麓典型季雨林中的次生阔叶林土壤为对象,采用实地调查与实验分析相结合的方法,对其土壤微生物数量和土壤蔗糖酶、脲酶、磷酸酶、过氧化氢酶的季节动态规律进行研究。结果表明：土壤过氧化氢酶、脲酶、蔗糖酶和酸性磷酸酶在垂直分布上均表现为0-10 cm土层高于10-20、20-30 cm土层,差异显著（P夏季〉春季〉冬季趋势。土壤细菌、放线菌和真菌含量均随着土壤深度的增加而减小,差异显著（P秋季〉春季〉冬季的变化趋势。相对于旱季,在十万大山南麓地区,典型次生阔叶林土壤微生物数量及酶活性季节性变化对高温多降水的雨季响应更明显。...

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Bibliographic Details
Published in广西植物 Vol. 36; no. 2; pp. 200 - 207
Main Author 张德楠 徐广平 张中峰 曾丹娟 顾大形 周翠鸣 黄玉清 何成新
Format Journal Article
LanguageChinese
Published 广西喀斯特植物保育与恢复生态学重点实验室, 广西壮族自治区中 国 科 学 院 广西植物研究所,广西 桂林541006 2016
Subjects
十万大山
土壤微生物数量
土壤酶活性
次生阔叶林
Shiwan Mountain
土壤微生物数量
土壤酶活性
次生阔叶林
十万大山
soil microorganism
soil enzyme
secondary broad-leaved forest
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ISSN1000-3142
DOI10.11931/guihaia.gxzw201410034

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Summary:为了评价广西十万大山南麓次生阔叶林土壤质量的变化,该研究以广西十万大山南麓典型季雨林中的次生阔叶林土壤为对象,采用实地调查与实验分析相结合的方法,对其土壤微生物数量和土壤蔗糖酶、脲酶、磷酸酶、过氧化氢酶的季节动态规律进行研究。结果表明：土壤过氧化氢酶、脲酶、蔗糖酶和酸性磷酸酶在垂直分布上均表现为0-10 cm土层高于10-20、20-30 cm土层,差异显著（P夏季〉春季〉冬季趋势。土壤细菌、放线菌和真菌含量均随着土壤深度的增加而减小,差异显著（P秋季〉春季〉冬季的变化趋势。相对于旱季,在十万大山南麓地区,典型次生阔叶林土壤微生物数量及酶活性季节性变化对高温多降水的雨季响应更明显。
Bibliography:Soil enzyme and microbial activities regulate organic matter decomposition and nutrient release,which in turn control nutrient status of forest soils.We conducted field survey and complimentary laboratory analysis of soils of a secondary broad-leaved forest in Shiwan Mountain,Guangxi,China,in 2012.We quantified soil urease,sucrose,acid phosphatase and catalase activities and assessed bacterial,actinomycetes and fungal community in 0-10,10-20 and 20-30 cm soil layers.We also determined moisture contents of these soils.Soil enzyme activities of catalase,urease,sucrase and acid phosphatase were significantly higher（P0.05） in 0-10 cm soil than those in 10-20 cm and 20-30 cm soils.We found two peaks of catalase activities,in spring and in autumn at all three depths.In contrast,urease and sucrase activities showed one peak in summer at all depths.Activities of acid phosphatase followed a decreasing trend from autumn to winter：autumnsummerspringwinter.Bacteria,actinomycetes and fungi decreased significantly（P0.05）wi
ISSN:1000-3142
DOI:10.11931/guihaia.gxzw201410034