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Effects of nitrogen application rate on chlorophyll fluorescence characteristics and dry matter accumulation in switchgrass ( Panicum virgatum) leaves
HE Hai-feng, YAN Cheng-hong, WU Na, LIU Ji-li, CHANG Wen-wen
Acta Prataculturae Sinica . 2020, (11): 141 -150 .  DOI: 10.11686/cyxb2020007