土壤有机质是决定土壤肥力大小的重要因素之一。论文以乐陵市为研究区,综合采用经典统计学、地统计学及空间分析研究方法,选用2005年、2010年、2015年和2020年4个时点的土壤有机质含量数据,分析土壤有机质15年间的时序变化特征和各年份空间特征。结果显示:2005~2020年间,乐陵市土壤有机质含量增加3.07 g?kg?1,年均增加0.20 g?kg?1,整体上属于中等水平。从空间分布来看,东部和西南地区土壤有机质含量较高,西北部地区较低。近年来山东省积极推行秸秆还田和配方施肥工作,使得有机质积累情况较好,乐陵市全域土壤有机质含量逐年提高。本研究探明了乐陵市土壤有机质时空特征,可为当地制定土壤有机质培肥和农业发展措施提供依据。
Soil organic matter is one of the important factors determining soil fertility. Taking Laoling City as the research area, this paper comprehensively adopts the research methods of classical statistics, geostatistics and spatial analysis, and selects the soil organic matter content data at four time points in 2005, 2010, 2015 and 2020 to analyze the temporal change characteristics and spatial characteristics of soil organic matter in 15 years. The results showed that from 2005 to 2020, the content of soil organic matter in Laoling City increased by 3.07 g?kg?1, with an average annual increase of 0.20 g?kg?1, which belongs to the medium level on the whole. In terms of spatial distribution, the content of soil organic matter is higher in the East and southwest and lower in the northwest. In recent years, Shandong Province has actively carried out straw returning and formula fertilization, which has made the accumulation of organic matter better, and the content of soil organic matter in Laoling City has increased year by year. This study proved the temporal and spatial characteristics of soil organic matter in Laoling City, which can provide a basis for local soil organic matter fertilization and agricultural development measures.