滇东南峰林湖盆区土壤理化性质的空间异质性分析

发布时间：2018-01-25 08:31

本文关键词： 滇东南峰林湖盆区土壤理化性质土壤水文结构功能　出处：《中国农业科技导报》2017年09期 　论文类型：期刊论文

【摘要】：为了解喀斯特地区退耕还林过程中不同植被恢复阶段的土壤理化性质特征,于研究区坡面的不同坡位设置样地:坡耕地(坡脚)、云南松人工林(下坡)、次生林(中坡)、石灰岩灌丛(上坡)。采用野外取样与室内分析相结合的方法对土壤理化性质进行了调查,并对其各项理化性质指标进行了皮尔逊(Pearson)相关性分析和主成分分析,最后,采用土壤水文结构功能模型评价滇东南普者黑峰林湖盆区次生林恢复植被的土壤水文结构功能。结果表明:研究区土壤孔隙度、毛管持水量状况大致为次生林云南松林石灰岩灌丛坡耕地;云南松人工林和次生林有机质、全氮、全磷、全钾等元素均较高,p H较低。相关性分析表明,土壤含水率、有机质、全氮、全钾、交换性镁与土壤的其他理化性质有较强的相关性,是喀斯特地区保持土壤理化性质的主要因子。主成分分析表明,土壤总孔隙度、非毛管孔隙度、含水率、有机质、全磷、交换性镁、交换性钙、pH是土壤理化性质的关键因子,是养分循环和流动的载体。土壤水文结构功能指数的计算结果表明,次生林(0.68%)云南松林(0.43%)石灰岩灌丛(0.26%)。
[Abstract]:In order to understand the characteristics of soil physical and chemical properties of different vegetation restoration stages in Karst area, different slope plots were set up in the study area: slope farmland (Potentilla, Pinus yunnanensis plantation). The physical and chemical properties of soil in secondary forest (middle slope and limestone shrub) were investigated by the method of field sampling and laboratory analysis. The correlation analysis and principal component analysis of various physicochemical properties were carried out. The function model of soil hydrological structure and function was used to evaluate the soil hydrological structure function of secondary forest restoration vegetation in Puerhefenglin lake basin of southeastern Yunnan. The results showed that the soil porosity was studied. The water holding capacity of capillary is about slope farmland of limestone shrub in the secondary forest of Pinus yunnanensis. The contents of organic matter, total nitrogen, total phosphorus, total potassium and other elements in plantation and secondary forest of Pinus yunnanensis were all higher and lower. Correlation analysis showed that soil moisture content, organic matter, total nitrogen and total potassium were all higher. Exchangeable magnesium has a strong correlation with other physical and chemical properties of soil and is the main factor to maintain soil physical and chemical properties in karst area. Principal component analysis shows that soil total porosity, non-capillary porosity, moisture content. Organic matter, total phosphorus, exchangeable magnesium and exchangeable Ca ~ (2 +) pH are the key factors of soil physical and chemical properties and the carriers of nutrient circulation and flow. Secondary forest 0.68) Yunnan pine forest 0.43) limestone thickets 0.26.
【作者单位】：云南师范大学旅游与地理科学学院;
【基金】：国家自然科学基金项目(41661004) 云南师范大学研究生科研创新基金项目(2017060)资助
【分类号】：S714.2
【正文快照】： 岩溶区石漠化问题已经成为制约我国西南岩溶地区区域经济发展和地方社会稳定的重大生态问题[1]。植被恢复是石漠化治理的关键环节,也是提高土壤质量的有效途径,已经成为退化生态系统恢复重建的研究热点[2]。土壤是植物群落生长的物质基础,是植被发育与之发生相互作用的环境因

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