| Autor: |
Baek, Gyeongwon, Lim, Hyungwoo, Noh, Nam Jin, Kim, Choonsig |
| Rok vydání: |
2023 |
| Předmět: |
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| Zdroj: |
Scientific Reports. 13 |
| ISSN: |
2045-2322 |
| DOI: |
10.1038/s41598-023-27989-3 |
| Popis: |
Carbon (C) sequestration capacity in forest ecosystems is generally constrained by soil nitrogen (N) availability. Consequently, N fertilization is seen as a promising tool for enhancing ecosystem-level C sequestration in N-limited forests. We examined the responses of ecosystem C (vegetation and soil) and soil N dynamics to 3 years of annual nitrogen-phosphorus-potassium (N3P4K1 = 11.3 g N, 15.0 g P, 3.7 g K m−2 year−1) or PK fertilization (P4K1), observed over 4 years in a 40-year-old Pinus densiflora forest with poor N nutrition in South Korea. PK fertilization without N was performed to test for PK limitation other than N. Neither tree growth nor soil C fluxes responded to annual NPK or PK fertilization despite an increase in soil mineral N fluxes following NPK fertilization. NPK fertilization increased the rate of N immobilization and 80% of the added N was recovered from mineral soil in the 0–5 cm layer, suggesting that relatively little of the added N was available to trees. These results indicate that N fertilization does not always enhance C sequestration even in forests with poor N nutrition and should therefore be applied with caution. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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