中温-暖温带表土碳氮磷生态化学计量特征的空间变异性——以河北省为例

发布时间：2018-06-04 22:26

  本文选题：碳氮磷 + 生态化学计量　； 参考：《生态学报》2017年18期

【摘要】：解析区域土壤碳氮磷元素的生态化学计量特征的空间分异格局有助于土壤养分的综合管理与利用。运用传统统计学和地统计学分析方法,以河北省为例分析了中温-暖温带表土(0—30cm)碳氮磷元素的生态化学计量特征的空间变异性及影响因素。结果显示:(1)土壤有机碳(SOC)、全氮(TSN)、全磷(TSP)其摩尔比率的变异系数均介于0.1—1之间,表明其在空间上存在中等程度的变异性。此外,C∶N的变异系数较小,表明C∶N较稳定。(2)表土TSP和C∶N具有小范围、强烈的空间自相关性,SOC、TSN、C∶P和N∶P具有较大范围、中等程度的空间自相关性,结构性因素是土壤碳氮磷含量及其摩尔比率空间变异的主要影响因素。从空间分布规律来看,表土碳氮磷含量及其摩尔比率均没有呈现明显的递增或递减的变化规律,SOC、TSN、C∶P和N∶P具有相同的空间分布趋势,高值区主要分布在冀北地区,分布面积较小,低值区分布范围较广;C∶N的高值区零星分布在冀北地区,TSP的高值区和低值区呈现斑块状分布。(3)土壤C∶N、C∶P和N∶P受到土壤理化性状、土地利用方式、人类扰动、气候及地形等因素的调控。此外,不同气候带的C∶N、C∶P和N∶P也存在一定的差异,研究区土壤C∶N与高寒带较接近,同时与其他气候带没有显著的差异;C∶P和N∶P与温带沙漠区较接近,与其余气候带存在显著的差异性,说明不同气候带之间的C∶N较C∶P和N∶P稳定。
[Abstract]:The spatial differentiation pattern of the ecological stoichiometric characteristics of soil carbon, nitrogen and phosphorus is helpful to the comprehensive management and utilization of soil nutrients. Taking Hebei Province as an example, the spatial variability and influencing factors of the ecostoictic characteristics of carbon, nitrogen and phosphorus were analyzed by using traditional statistics and geostatistical analysis. The results showed that the molar ratios of soil organic carbon (SOC), total nitrogen (TSNN) and total phosphorus (TSPs) ranged from 0.1 to 1, indicating that there was a moderate degree of variability in the soil organic carbon (SOC), total nitrogen (TSNN) and total phosphorus (TSPs). In addition, the coefficient of variation of C: n is smaller, indicating that the surface soil TSP and C: n have a small range, and the strong spatial autocorrelation between them has a large range and moderate degree of spatial autocorrelation. Structural factors are the main factors influencing the spatial variation of soil carbon, nitrogen and phosphorus content and their molar ratio. From the point of view of spatial distribution law, there is no obvious increasing or decreasing trend of carbon, nitrogen and phosphorus content and molar ratio of topsoil. The high value area is mainly distributed in the north of Hebei Province. The ratio of TSNC: P to N: P is the same as that of N: P, and the high value area is mainly distributed in the north of Hebei Province. The distribution area of low value area was wider than that of low value area. The high value area of C: n distributed sporadically in the high value area and low value area of tsp in the north of Hebei Province. The soil C: n (C: P) and N: P were subjected to soil physical and chemical properties and land use mode. The regulation of human disturbance, climate and topography. In addition, there are also some differences between C: n: C: P and N: P in different climatic zones. In the study area, soil C: n is close to the alpine zone, while there is no significant difference from other climatic zones. C: P and N: P are close to temperate desert. There is a significant difference from the other climatic zones, indicating that C: n is more stable than that of C: P and N: P in different climatic zones.
【作者单位】： 中国农业科学院农业资源与农业区划研究所农业部面源污染控制重点实验室;中国科学院亚热带农业生态研究所;中科院地理科学与资源研究所;The
【基金】：国家自然基金(31572208) 宁夏回族自治区土系调查与土系志编制(2014FY110200A07) 国家留学基金资助
【分类号】：S153
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本文编号：1979088