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

doi:10.11707/j.1001-7488.20130808

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 δ¹³C 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.

Key words: Populus deltoides, δ¹³C, water use efficient, nitrogen use efficient

CLC Number:

S718.43

Gao Ming, Huang Qinjun, Ding Changjun, Su Xiaohua. Foliar δ¹³C and Nitrogen Use Efficient of Populus deltoides and the Different Growth Vigor F₁ Hybrid Clones[J]. Scientia Silvae Sinicae, 2013, 49(8): 51-57.

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Foliar δ¹³C and Nitrogen Use Efficient of Populus deltoides and the Different Growth Vigor F₁ Hybrid Clones

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Foliar δ 13C and Nitrogen Use Efficient of Populus deltoides and the Different Growth Vigor F1 Hybrid Clones

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Foliar δ¹³C and Nitrogen Use Efficient of Populus deltoides and the Different Growth Vigor F₁ Hybrid Clones