林业科学2013，Vol.49Issue(8)：51-57,7.DOI:10.11707/j.1001-7488.20130808
美洲黑杨及其杂种F1不同生长势无性系叶片δ13C和氮素利用效率
Foliar δ13C and Nitrogen Use Efficient of Populus deltoides and the Different Growth Vigor F1 Hybrid Clones
摘要
Abstract
Abstract:In this paper,we measured carbon isotope composition,nitrogen content and carbon content in leaves at different canopies of Populus deltoides and their F1 hybrids to analyze the differences in the water use efficient (WUE) and nitrogen use efficient (NUE),and their relationship over P.deltoides and the F1 hybrids with different growth vigor.The results showed that there were significant differences in the δ13C value,nitrogen content and carbon content of different growth vigor F1 hybrids.The δ13C value,nitrogen content and carbon content of better-parent F1 hybrids in each canopy layer were significantly higher than those of lower-parent F1 hybrids.The δ13C value showed a highly significant correlation with nitrogen content (R2 =0.941).The divergency of vertical distribution of the 13C value,nitrogen content and carbon content was observed.Those parameters at the upper canopy were highest,followed by those at the middle canopy,and then by those at the lower canopy.The water use efficient of better-parent F1 hybrids was higher than that of lower-parent F1 hybrids.However,the nitrogen use efficient of better-parent F1 hybrids was lower than that of lower-parent F1 hybrids.There was a significant negative correlation between WUE and NUE (R2 =-0.652),indicating that there were certain constraints between WUE and NUE of P.deltoides.关键词
美洲黑杨/δ13C/水分利用效率/氮素利用效率Key words
Populus deltoides/δ13C/ water use efficient/ nitrogen use efficient分类
农业科技引用本文复制引用
高暝,黄秦军,丁昌俊,苏晓华..美洲黑杨及其杂种F1不同生长势无性系叶片δ13C和氮素利用效率[J].林业科学,2013,49(8):51-57,7.基金项目
国家"十二五"科技支撑计划课题"超高产优质杨树速生材新品种选育"(2012BAD01B03). （2012BAD01B03）
