长期封育对内蒙古羊草草地土壤有机碳组分的影响
王春燕1,2, 张晋京3, 吕瑜良1, 王莉3, 何念鹏2,*

Effects of long-term grazing exclusion on soil organic carbon fractions in the grasslands of Inner Mongolia
WANG Chun-yan1,2, ZHANG Jin-jing3, LV Yu-liang1, WANG Li3, HE Nian-peng2
图2 土壤胡敏酸的 13 C-NMRR波普
Fig.2 13 C-NMR spectra of soil humic acids