Reduced Application of Nitrogen Fertilizer Affects the Carbon Metabolism of Leaves and Maintains the Number of Flowers in Coreopsis tinctoria

This study examined the effects of nitrogen (N) fertilizer reduction on the carbon (C) metabolism and yield of Coreopsis tinctoria . A two-year (2020–2021) hydroponic experiment was conducted in accordance with a randomized complete group design with five N levels [0.875 mM Ca(NO 3 ) 2 (N1), 1.750 m...

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