南京林业大学学报（自然科学版）
External nitrogen input and soil inorganic nitrogen pool in different stands of poplar plantations
YAN Yafei, TIAN Ye, FANG Shengzuo,SONG Hao, DUN Xingjian1,2,4
JOURNAL OF NANJING FORESTRY UNIVERSITY . 2015, (04): 69 -74 .  DOI: 10.3969/j.issn.1000-2006.2015.04.012

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