摘要
为了探明喀斯特峰丛洼地土壤矿物质的分布规律,为喀斯特地区植被恢复和生态重建提供参考,该研究基于动态监测样地（200m×100m）的网格取样分析,采用经典统计学和地统计学方法研究了喀斯特木论自然保护区典型峰丛洼地表层（0~20cm）土壤矿物质（SiO2、Fe2O3、CaO、MgO、Al2O3、MnO）的空间异质性.结果表明,研究区土壤6种矿物质含量的差异及变异系数均较大,SiO2和Al2O3占了土壤矿物质总量的89.53%。不同矿物质具有不同的空间结构和最佳拟合模型,SiO2和MnO呈中等空间自相关,变程长,空间连续性较好,Fe2O3、Al2O3、CaO、MgO的空间自相关强烈,变程较短。CaO和MgO的Kriging等值线图相似,SiO2反之,Fe2O3和Al2O3呈相似分布,MnO的分布均匀。地形、微地貌、降雨、人为干扰特别是植被是土壤矿物质空间异质性的主要影响因素,增加植物多样性和覆盖度能有效改善和合理利用喀斯特土壤矿物质资源。
In order to explore the distribution pattern of the main soil mineral components in karst cluster-peak depression area and to guide vegetation restoration and ecological reconstruction in the area,the spatial heterogeneity of mineral components （SiO2,Fe2O3,CaO,MgO,Al2O3,and MnO） in surface soil （0-20cm） in Mulun National Nature Reserve was studied by the methods of classical statistics and geostatistics.The soil samples were collected with grid method based on a dynamic monitoring plot （200 m × 100 m） in Mulun National Nature Reserve karst cluster-peak depression area.The results showed that the content differences of the six mineral components were large,and the sum of SiO2 and Al2O3 accounted for 89.53% of the total six mineral components.The variance coefficients of all the six mineral compositions were large.The spatial patterns of the six mineral components were quite different from each other,and fit to different models of mineral components.Both SiO2 and MnO had medium spatial autocorrelation with long range and well spatial continuum.Fe2O3,Al2O3,CaO,and MgO were characterized by strong spatial autocorrelation with short ranges.The Kriging contour maps indicated that the distribution pattern of CaO and MgO were similar,but opposite to that of SiO2.And the distribution pattern of Fe2O3 was similar with that of Al2O3,while MnO was in a relative homogeneous distribution status.The results indicated that topography,micro-physiognomy,precipitation,the history of human disturbance,and especially vegetation were the most important factors that affecting the spatial patterns of soil mineral components in karst cluster-peak depression region.Therefore,increasing plant diversity and vegetation coverage would be of great importance for effective improvement and rational utilization of soil mineral resources.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2011年第6期79-84,F0004,共7页
Transactions of the Chinese Society of Agricultural Engineering
基金
中国科学院西部行动计划项目
中国科学院知识创新工程项目(KZCX-2-YW-436)
中国科学院战略性先导科技专项(XDA05050205
XDA05070404)
中国科学院"西部之光"人才培养计划
国家科技支撑计划(2010BAE00739
2009BADC6B008)
国家自然科学基金项目(31070425
31000224
30970508
U1033004)
关键词
土壤
矿物质
统计学方法
地统计学
空间异质性
木论自然保护区
喀斯特
soils
minerals
statistical methods
geostatistics
spatial heterogeneity
Mulun National Nature Reserve
Karst area
