聊城市典型农业区耕地土壤养分元素地球化学特征

张文强, 李常锁, 刘金鑫, 程诗悦, 滕跃, 李根林

Geochemical characteristics of soil nutrient elements in cultivated land within a typical agricultural area, Liaocheng City, China

ZHANG Wen-Qiang, LI Chang-Suo, LIU Jin-Xin, CHENG Shi-Yue, TENG Yue, LI Gen-Lin

表3 土壤硒、碘、氟等级划分标准

Table 3 Classification standards for soil Selenium, Iodine, and Fluoride levels 10-6

指标 缺乏 边缘 适量 高 过剩 Se ≤0.125 0.125~0.175 0.175~0.40 0.40~3.0 >3.0 I ≤1.0 1.0~1.5 1.5~5.0 5~100 >100 F ≤400 400~500 500~550 550~700 >700