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4 垂直土壤剖面中各形态硒含量及所占比例(n=16)

Table 4 Selenium content and proportion of each form in vertical soil profiles(n=16)

硒形态 ZH6 ZH10 平均值/10-6 范围/10-6 所占比例/% 平均值/10-6 范围/10-6 所占比例/% 水溶态 0.0068 0.0049~0.0092 2.76 0.0084 0.0048~0.0143 3.30 离子交换态 0.0048 0.0040~0.0061 1.96 0.0047 0.0037~0.0106 1.85 碳酸盐结合态 0.0056 0.0039~0.0066 2.26 0.0053 0.0047~0.0061 2.09 腐殖酸结合态 0.0536 0.0270~0.0850 21.66 0.0613 0.0340~0.1090 23.96 铁锰氧化物结合态 0.0050 0.0035~0.0084 2.00 0.0046 0.0025~0.0082 1.78 强有机结合态 0.0879 0.0310~0.1550 35.49 0.0783 0.0380~0.1280 30.61 残渣态 0.0839 0.0413~0.1598 33.88 0.0931 0.0318~0.1679 36.41 各形态硒含量之和 0.2476 0.1179~0.4281 100.00 0.2556 0.1234~0.4352 100.00