菘蓝苗期生长与气体交换参数对不同浓度酰胺态氮的动态响应  

Dynamic responses of growth and gas exchange parameters of Isatis indigotica seedlings to different concentration amide nitrogen

作　　者：唐晓清[1] 吕婷婷[1] 张毅[1] 李艳[1] 杨月[1] 施晟璐 王康才[1] 

机构地区：[1]南京农业大学园艺学院,南京210095

出　　处：《生态学杂志》2015年第1期53-59,共7页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(31171486);国家级大学生创新创业训练计划项目(201310307026)资助

摘　　要：以盆栽方式研究了苗期菘蓝生长及气体交换参数对不同浓度的酰胺态氮施用次数的响应。结果表明：苗期施用适宜浓度的酰胺态氮能有效地提高菘蓝叶片的叶绿素相对含量（SPAD值）、净光合速率（Pn）、蒸腾速率（Tr）与胞间二氧化碳浓度（Ci）,也能有效促进主根直径、单株叶与根的鲜质量,其中以浓度为1.0%-1.5%的酰胺态氮施用2次的促进作用明显;建议在菘蓝营养生长前期以促进生长为目的,施用1.0%-1.5%的纯脲有利于其生物量的积累。The responses of the growth and gas exchange parameters of Isatis indigotica seedlings to amide nitrogen applied at different levels and frequencies were studied. The results showed that application of amide nitrogen at a suitable concentration increased leaf chlorophyll relative content （SPAD）, net photosynthetic rate （Pn）, transpiration rate （Tr） and intercellular carbon dioxide concentration （Ci） in I. indigotica leaves, and obviously improved the taproot diameter, the fresh weights of leaves and roots, in which the promoting effect of application two times of 1.0%-1.5% amide nitrogen was more stronger. It was suggested that 1.0%-1.5% pure urea could be used for improving the biomass accumulation of leaves and roots in the pre-stage of I. in- digotica seedling cuhivation.

关 键 词：菘蓝 酰胺态氮 生长 气体交换参数 

分 类 号：S567.239[农业科学—中草药栽培]