南京林业大学学报（自然科学版）
Effects of Different Nitrogen Forms and Ratios on the Photosynthetic Characteristics of Pinus koraiensis Seedlings
CHEN Yong-liang1,2, LIU Ming-he1, LI Xiu-ling1
JOURNAL OF NANJING FORESTRY UNIVERSITY . 2005, (03): 77 -80 .  DOI: 10.3969/j.jssn.1000-2006.2005.03.020

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