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土壤是一个时空连续的变异体,在大小不同的尺度上均呈现出不同程度的空间异质性[1],而土壤有机质作为耕地质量的核心内容之一,是植物矿质营养有机营养的源泉,其含量的高低与耕地土壤肥力水平密切相关[2]。陈健[3]等认为,在一定含量范围内,有机质含量与土壤肥力成正相关,一旦缺失则需要较长的时间才能恢复。随耕作年限的增加,以及农民的施肥习惯,导致目前氮肥施用过量,磷素在土壤表
Soil is a spatiotemporal continuous variation with varying degrees of spatial heterogeneity at different scales [1]. Soil organic matter, as one of the core components of cultivated land quality, is the source of organic nutrition of plant mineral nutrition. The content of soil fertility level is closely related to cultivated land [2]. Chen Jian [3] and other think, within a certain range of content, organic matter content and soil fertility are positively correlated, once missing, you need a longer time to recover. With the increase of farming years, as well as farmers’ fertilization practices, leading to the current excessive nitrogen fertilizer, phosphorus in the soil table