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| 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 | |
| 引用本文： | 刘希华,丁昌俊,张伟溪,李文文,黄秦军,苏晓华.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[J].林业科学研究,2010,23(3):368-374. |
| 作者姓名： | 刘希华 丁昌俊 张伟溪 李文文 黄秦军 苏晓华 |
| 作者单位： | 1. 南京林业大学森林资源与环境学院,江苏,南京,210037;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;三明学院化学与生物工程系,福建,三明,365004 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;北京林业大学林学院,北京,100083 3. 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;东北林业大学生命科学学院,黑龙江,哈尔滨,150040 4. 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 |
| 基金项目： | 国家"十一五"科技支撑计划项目(2006BAD01A15)和国家科技支撑计划项目(2006BAD32B0102) |
| 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。 |
| 关 键 词： | 欧洲黑杨 氮素利用效率 生长性状 生理 根系形态 |
Study on Difference and Primarily Mechanism of Nitrogen Use Efficiency (NUE) in Populus nigra Seedlings Genotypes |
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| LIU Xi-hu,DING Chang-jun,ZHANG Wei-xi,LI Wen-wen,HUANG Qin-jun and SU Xiao-hua.Study on Difference and Primarily Mechanism of Nitrogen Use Efficiency (NUE) in Populus nigra Seedlings Genotypes[J].Forest Research,2010,23(3):368-374. | |
| Authors: | LIU Xi-hu DING Chang-jun ZHANG Wei-xi LI Wen-wen HUANG Qin-jun and SU Xiao-hua |
| Institution: | College of Forestry Resources and Environment, Nanjing Forestry University, Nanjing 210037, jiangsu, China;Research Institute of Forestry,Chinese Academy of Forestry; Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Beijing 100091, China;;Department of Chemistry & Biology Engineering, Sanming University, Sanming 365004, Fujian, China);Research Institute of Forestry,Chinese Academy of Forestry; Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Beijing 100091, China;;College of Forestry, Beijing Forestry University, Beijing 100083, China;Research Institute of Forestry,Chinese Academy of Forestry; Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Beijing 100091, China;;College of Life Sciences, Northeast Forestry University, Harbin 150040, Heilongjiang, China;Research Institute of Forestry,Chinese Academy of Forestry; Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Beijing 100091, China;;Research Institute of Forestry,Chinese Academy of Forestry; Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Beijing 100091, China;;Research Institute of Forestry,Chinese Academy of Forestry; Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Beijing 100091, China; |
| Abstract: | 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. |
| Keywords: | Populus nigra nitrogen use efficiency growth characteristics physiological characteristics root morphology |
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