Effects of different ratios of ammonium nitrogen and nitrate nitrogen on growth and nutrient absorption of standard chrysanthemum

In order to study the effects of different ratios of ammonium nitrogen and nitrate nitrogen on the growth and nutrient absorption of standard chrysanthemum ‘Huanghe', ammonium nitrogen and nitrate nitrogen ratios were set as 2∶1,1 ∶1, 1 ∶2, while total nitrogen concentration was 200 mg/L. By analyzing plant height, leaf number, chlorophyll content,florescence, flower diameter, tubular petal, stem diameter, internode length, leaf length, leaf width and element content,when NH4+-N∶NO3--N=2∶1, most indicators reached the maximum. Different ammonium nitrogen and nitrate nitrogen ratio had no significant influence on nutrient absorption.