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Short-term effects of soil warming and nitrogen addition on the N:P stoichiometry of Cunninghamia lanceolata in subtropical regions.
- Source :
-
Plant & Soil . Feb2017, Vol. 411 Issue 1/2, p395-407. 13p. - Publication Year :
- 2017
-
Abstract
- Aims: Increasing temperature and nitrogen (N) deposition are major drivers of global change that will influence plant-soil systems. We aimed to understand how plant stoichiometry and nutrient limiting types could change with continued warming and N inputs in subtropical regions. Methods: In 2014, the experiments were established in 30 mini-plots (2 × 2 m) with the following treatments: control, high N addition, low N addition, warming, warming + high N addition, and warming + low N addition. We sampled the leaf and root of Cunninghamia lanceolata and soils to assess their elemental and stoichiometric variables and δN under all six conditions. Results: Both experimental warming and N fertilization consistently induced an increase in fine-root N, P, and N:P. The N:P ratio of the mature green-leaf and soil was 7.24-11.63 and 4.79-6.56, respectively. On average, C. lanceolata showed higher proportional P resorption, but lower N resorption. The δN enrichment factor significantly increased in the warming and N addition treatments. Conclusions: N addition decrease leaf N content, and increased the plant growth, which was due to the effect of the N dilution of C. lanceolata. In subtropical regions, N-limitation affects the growth of C. lanceolata, and the concurrent increase in warming and N fertilization should help relieve N-limiting conditions. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0032079X
- Volume :
- 411
- Issue :
- 1/2
- Database :
- Academic Search Index
- Journal :
- Plant & Soil
- Publication Type :
- Academic Journal
- Accession number :
- 121061621
- Full Text :
- https://doi.org/10.1007/s11104-016-3037-4