Abstract
The rates of soil N mineralization at soil depths of 0–15, 15–30, 30–45 and 45–60 cm and moisture regimes were measured at three sand-fixation plantations ofPinus sylvestris var.mongolica by laboratory aerobic incubation method. The results showed that average rates of soil net N-mineralization across soil depth varied from 1.06 to 7.52 mg·kg−1·month−1 at soil depths from 0 to 60 cm. Statistical analyses indicated that the effects of different soil depths, moistures and their interactions on net N-mineralization rates were significant (P<0.05). The net N-mineralization rates significantly decreased with increasing soil depths and at depth 0–15 cm accounted for 60.52% of that at depth of 0–60 cm. There was no difference in soil net N-mineralization rates between half and fully-saturated water treatments, however these rates were substantially higher than that without water treatment (P<0.05). The factors influencing N mineralization process have to be studied further in these semiarid pine ecosystems.
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Foundation item: This paper was supported by National Natural Science Foundation of China (30471377), the Chinese Academy of Sciences (Knowledge Innovation Project KZCX3-SW-418), and the Institute of Applied Ecology of Chinese Academy of Sciences (SLYQY0409).
Biography: CHEN Fu-Sheng (1973-), male, Ph.D. Candidate, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, P. R. China.
Responsible editor: Zhu Hong
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Fu-sheng, C., De-hui, Z., Anand Narain, S. et al. Effects of soil moisture and soil depth on nitrogen mineralization process under Mongolian pine plantations in Zhanggutai sandy land, P. R. China. Journal of Forestry Research 16, 101–104 (2005). https://doi.org/10.1007/BF02857899
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DOI: https://doi.org/10.1007/BF02857899
Keywords
- Laboratory aerobic incubation method
- Nitrogen mineralization
- Management practices
- Sand-fixation forest
- Semiarid region
- Pinus sylvestris var.mongolica
- Soil depth