Effect of Nitrogen Application on Growth and Leaf Color Changes of Acer rubrum Seedlings
A single factor experiment was used to study the effects of different nitrogen applications on the growth and leaf color changes of Acer rubrum seedlings by using the annual Acer rubrum cuttings as the ex-perimental material for potted cultivation.The experiment set up five nitrogen fertilizer applications based on keeping the P2O5(4 g)and K2O(8 g)content unchanged in each pot.The results showed that the growth and dry matter accumulation of Acer rubrum seedlings showed a trend of first increasing and then decreasing with the increase of nitrogen application.The best effect was achieved with a nitrogen applica-tions of 12 g per pot,followed by a treatment of 10 g per pot.The effects of both treatments on the height,diameter,dry and fresh weights,root stem ratio,and physiological indicators of Acer rubrum seedlings did not reach a significant level.The total chlorophyll content in the leaves of Acer rubrum seed-lings was highest in the nitrogen applications of 12 g per pot,but the anthocyanin content was highest in the nitrogen application rate of 10 g per pot.The leaves changed color quickly,lasted for a long time,and had high ornamental characteristics.In conclusion,appropriately reducing the nitrogen applications was beneficial for improving the discoloration of Acer rubrum leaves,and the optimal ornamental effect was achieved with a nitrogen applications of 10 g per pot under experimental conditions,which could be applied and promoted in production.
nitrogen applicationAcer rubrumleaf color changeanthocyaninseedling growth
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