40年甘肃省耕层土壤有机碳时空分异及影响因素
张美兰, 崔增团, 顿志恒, 贾蕊鸿, 张玉霞, 郭世乾, 崔倩怡, 葛承暄, 蔡立群, 董博

The Spatial-temporal variance characteristic of soil organic carbon in cultivited land of Gansu Province and its influencing factors in the 40 years from 1980 to 2020
Meilan Zhang, Zengtuan Cui, Zhiheng Dun, Ruihong Jia, Yuxia Zhang, Shiqian Guo, Qianyi Cui, Chenxuan Ge, Liqun Cai, Bo Dong
图3 甘肃省化肥施用量、秸秆还田量、有机肥施用量和耕层SOC含量
Fig.3 Changes in chemical fertilizer application、the return of straw to the field、the application of organic fertilizer and the SOC content in Gansu Province