文献类型：期刊文献

中文题名：不同供氮水平对4种桤木幼苗生长的影响

英文题名：Growing Responses of Four Exotic Alder Seedling under Different Nitrogen Concentrations

作者：饶龙兵[1] 李霞[1,2] 段红平[2] 陈益泰[1]

第一作者：饶龙兵

机构：[1]中国林业科学研究院亚热带林业研究所;[2]云南农业大学资源与环境学院

年份：2012

卷号：25

期号：2

起止页码：246-253

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；

基金：中央级公益性科研院所基本科研业务费专项资金项目(RISF6929)

语种：中文

中文关键词：桤木;桤木属;氮水平;生长反应;生物量;根系参数

外文关键词：alder; Alnus genus; nitrogen concentration; growing responses; biomass; root parameter

分类号：S792.14

摘要：桤木属（Alnus Mill.）植物为桦木科（Betulace-ae）落叶乔木,典型的木本非豆科（Leguminosae）固氮树种,主要分布于北半球寒温带、温带和亚热带地区。全世界大约有40余种,我国有11种。桤木属植物生长迅速，其叶含氮量高，为良好的优质天然肥料和饲料树种；木材用途广，为优质的建筑、家具和造纸用材树种；其适应性广，喜温、喜湿、耐水和耐瘠薄，是重要的生态防护树种。
The experiment on four exotic alder including Alnus glutinosa,A.rubra,A.nitida and A.incana growing under four different concentrations of nitrogen was conducted in a greenhouse in order to research the alder＇s responses under different nitrogen concentrations and stresses.The results showed that the growing parameters of alder on the survival percent of transplanting,plant height,ground diameter,biomass,root-top ratio,relative content of chlorophyll（SPAD） and rooting parameters（length,superficial area,volume and tips of root） were significant among different materials and different nitrogen concentrations,the different level of nitrogen significantly affected the growth of alder.Specifically,the survival percent of transplanting went down with the going up of nitrogen concentration,and the plant height,ground diameter,relative content of chlorophyll and rooting parameters went up when nitrogen varied from 0 to 1/2 normal nitrogen,yet went down at one or two times of normal nitrogen（E.G.Bollard formula）.The relative content of chlorophyll went up with the concentration of nitrogen increasing from 0 to 2 normal nitrogen,and its trend during one year period showed rising firstly and then descending.The relationship between the value of SPAD and biomass did not appear positive correlation.The appropriate concentration for growing on alder was 1/2 normal nitrogen.The order of performance of growth among the four alder was Alnus glutinosa,A.rubra,A.nitida and A.incana.So,A.glutinosa and A.rubra potentially could be used as plantation trees of ecological protection and short-rotation lumber in the beach and low hills of middle and lower reaches of Yangtze River.