内蒙古土默特左旗典型草甸土中硒赋存形态特征

刘金宝, 徐宏国, 袁宏伟, 张晓峰

Speciation of selenium in typical meadow soils in Tumed Left Banner, Inner Mongolia, China

LIU Jin-Bao, XU Hong-Guo, YUAN Hong-Wei, ZHANG Xiao-Feng

表6 土壤理化指标、有效硒与各形态硒含量Spearman等级相关系数(r)统计

Table 6 Statistical of Spearman's rank correlation coefficients (r) between soil physicochemical indicators, effective selenium and each form of selenium in soils

指标 水溶态硒 离子 交换态硒 碳酸盐 结合态硒 腐殖酸 结合态硒 铁锰氧化物 结合态硒 强有机 结合态硒 残渣态硒 全量硒 0.4565 0.0330 -0.0352 0.8405** 0.8490** 0.9493** 0.7877** 有机质 0.1080 0.1716 -0.3212 0.7107** 0.5006 0.4273 0.4158 CEC 0.0862 0.0540 -0.3252 0.6108* 0.4641 0.2627 0.2514 pH 0.4823 -0.4141 -0.0220 -0.1850 0.0077 -0.0584 -0.3612 P 0.4724 0.1167 -0.2797 0.6806** 0.3742 0.4498 0.3216 S -0.6615** -0.1342 0.1276 -0.2992 -0.1808 -0.4053 -0.2772 K 0.0796 -0.0993 -0.2693 0.5464* 0.4237 0.2232 0.2351 黏土矿物 0.1610 -0.1034 -0.2992 0.4224 -0.0243 0.1718 0.1628 有效硒 0.5254* -0.0859 -0.1123 0.4648 0.3322 0.5865* 0.5198