Wurihan,ZHANG Xinhai,CHANG Shuai,et al.Spatial Differentiation Characteristics of Soil Organic Carbon，Total Nitrogen and Total Phosphorus in Xilingol Steppe[J].Northern Horticulture,2023,(06):70-79.[doi:10.11937/bfyy.20222096]
锡林郭勒草原土壤有机碳、全氮、全磷空间分异特征
- Title:
- Spatial Differentiation Characteristics of Soil Organic Carbon，Total Nitrogen and Total Phosphorus in Xilingol Steppe
- Keywords:
- soil carbon; nitrogen and phosphorus; ecological stoichiometry; spatial variability; Xilingol grassland
- 文献标志码:
- A
- 摘要:
- 以锡林郭勒草原表层0~20 cm土壤为研究对象，通过野外采样及室内试验，采用经典统计法、地统计学方法、空间自相关分析法，研究了该地区土壤有机碳、全氮、全磷的基本含量特征以及空间变异性，以期为草原生态环境保护和土壤资源的可持续利用提供参考依据。结果表明：1）锡林郭勒草原土壤有机碳（SOC）含量缺乏，全氮（TN）含量丰富，全磷（TP）含量极为缺乏；土壤碳氮磷及其化学计量比均为中等强度变异。2）锡林郭勒草原SOC、TN、TP、C/P和C/N均具有强烈的空间变异性，主要由结构性因素引起；N/P为中等空间变异，主要由随机性因素和结构性因素2种因素共同作用。3）锡林郭勒草原SOC、TN及生态化学计量全局莫兰指数为正值，属于集聚分布类型，而TP属于孤立分布类型。4）锡林郭勒草原0～20 cm土层SOC、TN、C/N、C/P和N/P的水平空间分布类型均为带状分布，呈从东向西逐渐减少的趋势，TP空间分布差异不明显。5）除了土壤TP与C/N、C/P无显著相关性，其它指标间均具有显著或极显著相关特征。
- Abstract:
- The 0-20 cm surface soil nutrients in Xilingol grassland were used as test marerial.The field sampling and laboratory experiments were carried out，the characteristics and spatial variability of the soil nutrients were studied by classical statistics，geostatistics，spatial autocorrelation analysis and GIS technology,in order to provide reference for grassland ecological environment protection and sustainable utilization of soil resources.The results showed that,1) SOC content was deficient，TN content was abundant and TP content was extremely scarce in Xilingol grassland.The variation of soil C，N，P and their stoichiometric ratios were moderate.2) In Xilingol grassland,SOC，TN，TP，C/P and C/N had strong spatial variability，which was mainly caused by structural factors.N/P was a medium spatial variation，which was mainly caused by random factors and structural factors.3) SOC，TN and the global ecostoichiometric Moran′s I were positive in Xilingol grassland，belonging to the cluster distribution type，while TP belonged to the isolated distribution type.4) The horizontal spatial distribution of SOC，TN，C/N，C/P and N/P in the 0-20 cm soil layer of Xilingol grassland showed a zonal distribution，gradually decreasing from east to west，and the spatial distribution of TP was not significantly different.5) Except that soil TP had no significant correlation with C/N and C/P，the other indexes had significant or extremely significant correlation characteristics.
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备注/Memo
第一作者简介：乌日汗(1998-)，女，硕士研究生，研究方向为生物地理学。E-mail:2672902450@qq.com.责任作者：于红博(1977-)，女，博士，副教授，现主要从事自然地理学等研究工作。E-mail:1106275721@qq.com.基金项目：内蒙古自然科学基金资助项目(2021MS04015)；国家自然科学基金资助项目(41661009,42161023)。收稿日期：2022-05-20