北京林业大学学报2016，Vol.38Issue(8)：64-70,7.DOI:10.13332/j.1000-1522.20160099
叶面施氮对东北红豆杉幼苗生长及光合特性的影响
Effects of foliar nitrogen application on growth and photosynthetic characteristics of Taxus cuspidata seedlings
摘要
Abstract
In order to find the growth responseto nitrogen fertilizing during the breeding of Taxus cuspidata, six-year-old seedlings were taken as experimental materials to study the fertilizing effects of foliar nitrogen on growth, leaf nitrogen content, chlorophyll content and photosynthetic characteristics. The seedlings were treated with three nitrogen levels (0. 5, 1. 0, 1. 5 g/L) and three nitrogen forms, namely, urea, nitrate-nitrogen and ammonium nitrogen. The results showed that the growth of seedlings treated with nitrogen were better than the seedlings treated with water ( CK) , and the branch growth treated with 1 g/L urea was 39. 1% longer than that of CK ( P < 0. 01 ) . Leaf nitrogen content and chlorophyll content of all nitrogen treated seedlings increased obviously, the seedlings treated with 1. 5 g/L urea had the highest nitrogen content which was 20. 0% higher than CK ( P<0. 01 ) , total chlorophyll content and chlorophyll a content of the seedlings fertilized with 1 g/L urea were 20. 5% and 27. 1% higher than that of CK, respectively ( P<0. 01 ) . The seedlings treated with nitrogen had better photosynthetic indexes than that of CK ( except for the seedlings treated with 1. 5 g/L ammonium sulfate) including the net photosynthetic rate (Pn), the maximum net photosynthetic rate (Pmax), apparent quantum efficiency (AQY) and light saturated point (LSP), and Pmax of seedlings treated with 1 g/L urea was improved by 62. 0% (P <0. 01) compared with CK. In general, total chlorophyll content and Pmax of seedlings showed an increasing trend as leaf nitrogen content increased, 1 g/L urea treatment had the best result, and there was no obvious difference between nitrate-nitrogen and ammonium nitrogen treatment.关键词
东北红豆杉/叶面施氮/生长/叶绿素含量/光合特性Key words
Taxus cuspidata/foliar nitrogen application/growth/chlorophyll content/photosynthetic characteristics分类
农业科技引用本文复制引用
刘彤,王琛,徐璐,周志强,张玉红..叶面施氮对东北红豆杉幼苗生长及光合特性的影响[J].北京林业大学学报,2016,38(8):64-70,7.基金项目
黑龙江省自然科学基金项目(C201344)、国家林业局珍稀濒危物种野外救护与繁育管理项目。 （C201344）
