近30年中国农业源氮磷排放的格局特征与水环境影响
马恩朴, 蔡建明, 林静, 廖柳文, 郭华, 韩燕

Spatial pattern and water environmental impact of nitrogen and phosphorus emissions from agricultural sources in China in recent 30 years
MA En-pu, CAI Jian-ming, LIN Jing, LIAO Liu-wen, GUO Hua, HAN Yan
图4 1990—2015年各(市、自治区)每平方公里的磷排放
Fig. 4 Phosphorus emissions per square kilometer in each province from 1990 to 2015