文献类型：期刊文献

中文题名：不同基因型欧洲黑杨幼苗氮素利用效率差异及其机理初探

英文题名：Study on Difference and Primarily Mechanism of Nitrogen Use Efficiency(NUE) in Populus nigra Seedlings Genotypes

作者：刘希华[1,2,5] 丁昌俊[2,3] 张伟溪[2,4] 李文文[2] 黄秦军[2] 苏晓华[2]

第一作者：刘希华

机构：[1]南京林业大学森林资源与环境学院,江苏南京210037;[2]中国林业科学研究院林业研究所,国家林业局林木培育重点实验室,北京100091;[3]北京林业大学林学院,北京100083;[4]东北林业大学生命科学学院,黑龙江哈尔滨150040;[5]三明学院化学与生物工程系,福建三明365004

年份：2010

期号：3

起止页码：368-374

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2008】；CSCD:【CSCD2011_2012】；

基金：国家“十一五”科技支撑计划项目(2006BAD01A15);国家科技支撑计划项目(2006BAD32B0102)

语种：中文

中文关键词：欧洲黑杨;氮素利用效率;生长性状;生理;根系形态

外文关键词：Populus nigra; nitrogen use efficiency; growth characteristics; physiological characteristics; root morphology

分类号：S792.11

摘要：以104份欧洲黑杨不同基因型(无性系)为材料,通过生长量和生理指标的测定,研究土壤施氮和不施氮条件下其氮素利用效率的差异。结果表明:不同供氮水平下,不同基因型欧洲黑杨生长差异显著。根据2个供氮水平的苗木年平均材积生长量将欧洲黑杨群体划分为4个类型:双高效型、高氮高效型、低氮高效型和双低效型,并结合氮反应指数在双高效型与高氮高效型中分别筛选出8个氮素利用效率高、生长表现优良的基因型,具较高的育种价值。比较分析欧洲黑杨不同基因型氮素利用效率相关指标,发现双高效型的净光合速率、硝酸还原酶和谷氨酰胺合成酶活性、根系干质量、体积、比表面积均高于高氮高效型,初步揭示了不同类型欧洲黑杨氮利用效率存在差异的机理。
The variation in nitrogen utilization efficiency of 104 Populus nigra genotypes was studied by analyzing growth and physiological parameters under nitrogen fertilization or non-fertilization conditions.The results showed that the variation of nitrogen utilization efficiency among seedlings of varied Populus nigra genotypes were significant at different nitrogen supply.All seedlings with varied genotypes in this study were divided into four categories according to annual average individual volume increment in the two nitrogen treatments.These categories are high efficient in both nitrogen applications,efficient in high N application,efficient in low N application,and low efficient in both nitrogen applications.Eight genotypes were selected from each of the first two categories.These seedlings are high efficient to nitrogen utilization with excellent growth and productivities,therefore they are highly valuable for tree breeding.Comparison and analysis of the related parameters of nitrogen utilization efficiency showed that the the values of nitrogen response parameters including net photosynthetic rate,nitrate reductase activity,GS Activity,root dry weight,root volume and specific root area of seedlings within the first category were all higher than those within the second category,which reveal preliminarily the mechanism underlying nitrogen utilization of different Populus nigra genotypes.