摘要
以当年生美国红枫扦插苗为试验材料进行盆栽,采用单因素试验,即在保持每盆P_(2)O_(5)(4 g)和K_(2)O(8 g)含量不变的基础上,设置5个氮肥施入量,研究不同施氮量对美国红枫幼苗生长和叶色表达的影响。结果表明,美国红枫幼苗的生长和干物质积累均随着施氮量的增加呈先升高后降低趋势,并以每盆施氮量为12 g处理效果最佳,以每盆10 g处理次之,两者对美国红枫幼苗株高、地径、幼苗干重和鲜重、根茎比、生理指标的影响均未达显著水平。美国红枫幼苗叶片总叶绿素含量以施氮量每盆12 g处理最高,但花色素苷含量以施氮量每盆10 g处理最高,叶片变色快,持续时间长并且观赏特性提高。由此可见,适当降低施氮水平,有利于提高美国红枫叶片变色,试验条件下以施氮量每盆10 g的处理观赏效果最佳,可在生产中应用推广。
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 experimental material for potted cultivation.The experiment set up five nitrogen fertilizer applications based on keeping the P_(2)O_(5)(4 g)and K_(2)O(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 applications 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 seedlings 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.
作者
卜会荣
纪志荣
郭伟
高兵
高慧峰
BU Huirong;JI Zhirong;GUO Wei;GAO Bing;GAO Huifeng(Niujialiang Forest Farm of Yuyang District,Yulin,Shaanxi 719000,China)
出处
《林业调查规划》
2024年第4期29-34,共6页
Forest Inventory and Planning
关键词
施氮水平
美国红枫
叶色变化
花色素苷
幼苗生长
nitrogen application
Acer rubrum
leaf color change
anthocyanin
seedling growth
