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中国农学通报

中国农学通报 ›› 2014, Vol. 30 ›› Issue (31): 33-40.doi: 10.11924/j.issn.1000-6850.2014-1775

所属专题： 生物技术

• 林学 园艺 园林 • 上一篇    下一篇

广西十万大山南麓不同植被类型土壤酶活性

孙英杰,何成新,徐广平,张德楠,周翠鸣,曾丹娟,黄玉清   

  1. 广西壮族自治区、中国科学院广西植物研究所,广西壮族自治区中国科学院广西植物研究所,广西壮族自治区中国科学院广西植物研究所,广西壮族自治区中国科学院广西植物研究所,广西壮族自治区中国科学院广西植物研究所,广西壮族自治区中国科学院广西植物研究所,广西壮族自治区中国科学院广西植物研究所
  • 收稿日期:2014-06-25 修回日期:2014-06-25 接受日期:2014-08-08 出版日期:2014-11-20 发布日期:2014-11-20
  • 通讯作者: 孙英杰
  • 基金资助:
    广西自然科学基金项目“广西北部湾经济区海洋、陆地生态系统监测及评价”(2010GXNSFE013002)，“桂西南喀斯特森林植被演替过程中土壤有机碳固定机制研究”(2012GXNSFBA053074)；岩溶动力学重点实验室基金项目“入侵植物水葫芦对桂林会仙岩溶湿地生态系统碳储量的影响”(KERDC201304)；中国科学院“西部之光”人才培养计划资助项目“桂西南石漠化地区不同土地利用方式下土壤碳库特征及碳截获作用机理”(科发人教字[2011]180号)；广西植物研究所基本业务费“广西十万大山季节雨林生态系统生物多样性监测”(桂植业11001)；国家自然科学基金项目“模拟氮沉降对桂西南喀斯特次生林土壤N2O排放的影响及其微生物机制”(41361057)。

Soil Enzyme Activities Among Different Vegetation Types in the South of Shiwan Mountain, Guangxi Province

  • Received:2014-06-25 Revised:2014-06-25 Accepted:2014-08-08 Online:2014-11-20 Published:2014-11-20

摘要： 为探明广西十万大山南麓典型季雨林中不同植被类型的土壤酶活性特征及其与土壤养分之间的关系，采用空间代替时间方法，选择次生阔叶林、马尾松林、灌草丛和撂荒地土壤为研究对象，对其微生物数量、土壤养分和土壤酶活性的变化进行研究。结果表明：同一土层土壤微生物总数量大小关系依此为：次生阔叶林＞马尾松林＞灌草丛＞撂荒地，并且随着土壤深度的增加而减少。微生物类群呈现出：细菌＞放线菌＞真菌的格局。次生阔叶林的表层土壤有机碳含量最高为(19.61±0.48) g/kg，除了马尾松林的速效氮含量最高外，其余各养分含量高低均为次生阔叶林＞马尾松林＞灌草丛＞撂荒地。各植被类型下土壤酶活性的垂直分布均表现为表层土壤酶活性大于下层；不同植被类型间土壤酶活性亦存在显著差异，次生阔叶林中土壤脲酶、蔗糖酶、酸性磷酸酶及过氧化氢酶活性均显著高于马尾松林、灌草丛和撂荒地。相关分析结果表明，同一植被类型下土壤酶活性与土壤养分之间存在不同程度的相关性，而撂荒地脲酶活性与全磷、速效磷含量呈负相关。土壤微生物数量与酶活性可以作为评价土壤肥力的指标，期望为广西十万大山自然保护区森林植被的自然恢复与重建提供更合理的评价体系。

关键词: 生态补偿, 生态补偿, 中国, 核心期刊, 论文, 立项项目, 量化分析

Abstract: The paper aims to reveal the characteristics of soil enzyme activity and the relationship between soil nutrient and enzyme activity among different vegetations in typical monsoon forest in the south of Shiwan Mountain, Guangxi Province. Using an approach of spatial sequence instead of time successional sequence, we chose the soil of secondary broad- leaved forest, masson pine forest, shrub- grassland and wasteland as the study object. The number of microorganisms, soil nutrient and the change of soil enzyme activities were investigated. The results showed that the number of total microorganisms in the same soil layer followed the way of secondary broad-leaved forest＞masson pine forest＞shrub-grassland＞waste land, and it decreased with the increasing of soil depth. Microbe group showed the pattern of bacteria＞actinomycetes＞fungi. The SOC content in soil surface of secondary broad-leaved forest was the highest about (19.61±0.48) g/kg, and the AN content in masson pine forest was the highest，but the other soil nutrient content showed that secondary broad- leaved forest＞masson pine forest＞shrub-grassland＞waste land. The vertical distribution of soil enzyme activities in each vegetation type showed that the enzyme activities of soil surface were higher than that of the lower soil. And there was a great significant difference between different vegetation types. Besides, the activities of soil urease, invertase, acid phosphatase and peroxidase in secondary broad-leaved forest were obviously higher than that of masson pine forest, shrub-grassland and waste land. There were different correlations between soil enzyme activities and soil nutrients under the same vegetation type. However, the urease activity showed negative correlation with soil total phosphorus and available phosphorus content in the waste land. The number of soil microorganism and soil enzyme activity could be the indices to evaluate the soil fertility, expecting to provide a more reasonable evaluation system for the natural recovery and reconstruction of vegetation in Guangxi Shiwan Mountain Nature Reserve.