上海地区落叶含氮量丰富的高效固氮树种选择  

Screening of Plants with N Fixation Efficiency and High N Concentration in Leaf Litter of Shanghai

作　　者：王振[1] 张京伟[2] 张德顺[3] 

机构地区：[1]青岛农业大学园林园艺学院 [2]烟台市农业科学研究院 [3]同济大学建筑与城市规划学院

出　　处：《中国园林》2011年第4期70-73,共4页Chinese Landscape Architecture

基　　金：同济大学985工程项目(编号0100144026);上海市科技兴农重点攻关项目(沪农攻科字2007第10-1号)共同资助

摘　　要：对29种固氮树种的固氮效率与叶片含氮量进行测定,分析了两者的关系及叶片氮输出率的大小。以此为据,筛选具有较强固氮能力、落叶含氮量较高的树种。结果表明:大多数固氮能力强的树种鲜叶含氮量较高,两者的相关系数为0.888**,达到极显著水平;江南桤木、胡颓子、花叶胡颓子、常春油麻藤、紫藤、染料木、合欢、杨梅8种树种15N自然丰度值介于-0.632‰～1.313‰,落叶含氮量介于1.288%～1.628%,是筛选出的较好的落叶肥田植物。In order to analyze the N exporting ratio of leaves, the relationship between N fixation efficiency and leaf N concentration of different N-fixing trees, N fixation efficiency and leaf N concentration of 29 N-fixing trees were screened in this experiment. The results showed that the trees with high-N-fixation efficiency usually had high-N-concentration in leaves, and there was significant correlation （correlative coefficient was 0.888） between them. δ15N values of Alnus traboculosa, Elaeagnus pungens, Elaeagnus pungens ＇Maculata＇, Mucuna sempervirens, Wisteria sinensis, Genista tinctoria, Albizia julibrissin and Myrica rubra were between-0.632‰ and 1.313‰, and the N concentration values of their leaf litter were between 1.288% and 1.628%. So they all had high capability of N fixation and were preferable plants for soil fertility enhancement.

关 键 词：园林植物 固氮树种 固氮效率 15N自然丰度法 叶片含氮量 上海 

分 类 号：S688[农业科学—观赏园艺]