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2010年利用GPS定位,在柴河流域采集土样100个,分析孔隙度、有机质、全氮和全磷的含量,应用传统统计学和地统计学方法对数据进行分析。结果表明,按照1980年全国第2次土壤普查养分分级标准,土壤有机质的平均含量属中等水平,全氮和全磷以较丰富为主。通过半方差函数分析,土壤孔隙度、有机质、全氮和全磷在一定范围内存在空间相关性,而土壤孔隙度、有机质和全磷的空间变异是由结构性因素和随机性因素共同作用引起的。研究揭示了柴河流域土壤有机质、全氮和全磷的空间变异规律及其影响因素,为实现土壤肥力评价和养分资源精准管理提供了科学依据。
In 2010, 100 soil samples were collected in the Chaihe River Basin using GPS positioning. The contents of porosity, organic matter, total nitrogen and total phosphorus were analyzed. The data were analyzed by traditional statistics and geostatistics. The results showed that the average content of soil organic matter was middle level and the total nitrogen and total phosphorus were more abundant in accordance with the second national soil nutrient classification standard in 1980. Spatial variability of soil porosity, organic matter, total nitrogen and total phosphorus were found within a certain range by semi-variance analysis. The spatial variability of soil porosity, organic matter and total phosphorus was caused by the combination of structural and random factors of. The study revealed the spatial variability of soil organic matter, total nitrogen and total phosphorus in the Chaihe River Basin and its influencing factors, which provided a scientific basis for the evaluation of soil fertility and the precise management of nutrient resources.