Chin J Plant Ecol ›› 2017, Vol. 41 ›› Issue (10): 1051-1059.DOI: 10.17521/cjpe.2017.0165
Special Issue: 稳定同位素生态学; 青藏高原植物生态学:植物-土壤-微生物
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Ting-Ting ZOU1,2, Zi-Liang ZHANG1,2, Na LI1, Yuan-Shuang YUAN1,2, Dong-Hui ZHENG1,2, Qin LIU1, Hua-Jun YIN1,3,*()
Online:
2017-10-10
Published:
2017-12-24
Contact:
Hua-Jun YIN
Ting-Ting ZOU, Zi-Liang ZHANG, Na LI, Yuan-Shuang YUAN, Dong-Hui ZHENG, Qin LIU, Hua-Jun YIN. Differential uptakes of different forms of soil nitrogen among major tree species in subalpine coniferous forests of western Sichuan, China[J]. Chin J Plant Ecol, 2017, 41(10): 1051-1059.
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URL: https://www.plant-ecology.com/EN/10.17521/cjpe.2017.0165
Fig. 2 Dynamics of natural 13C abundance (δ13C) in fine roots of Picea asperata (A) and Betula albo-sinensis seedlings (B) at different sampling times (mean ± SD, n = 6). Different lowercase letters indicate significant differences in the δ13C value among sampling times within species (p < 0.05).
Fig. 3 Dynamics of natural 15N abundance (δ15N) in fine roots of Picea asperata and Betula albo-sinensis seedlings at different sampling times (mean ± SD, n = 6). A, δ15N under 15NO3–-N labeling treatment. B, δ15N under glycine labeling treatment. C, δ15N for 15NH4+-N labeling treatment. Different lowercase letters indicate significant differences in the δ15N value among sampling times within species (p < 0.05).
Fig. 4 Differences in the mass-specific uptake rate for NO3–-N, glycine and NH4+-N in Picea asperata (A) and Betula albo-sinensis seedlings (B) at different sampling times (mean ± SD, n = 6). Different lowercase letters indicate significant differences in the uptake rate of different N forms at given sampling time (p < 0.05).
Fig. 5 Differences in the molar ratio of excess 13C to excess 15N derived from double-labelled (U-13C2/15N) glycine in fine roots of Picea asperata (A) and Betula albo-sinensis seedlings (B). Horizontal line represents the 2:1 injection ratio of C:N administered with the doubly labeled glycine treatment.
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