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The effect of understory removal on microclimate and soil properties in two subtropical lumber plantations

renchunxiao 添加于 2013/5/30 13:21:07  781次阅读 | 0次推荐 | 0个评论

Understory vegetation is an important component in forest ecosystems. However, the effects of understory on soil properties in subtropical forests are not fully understood. We thus conducted an experimental manipulative study in two young fast-growing plantations—Eucalyptus urophylla and Acacia crassicarpa—in southern China, by removing understory vegetation in both plantations, to estimate the effects of understory vegetation on microclimate, soil properties and N mineralization. Our data showed that, after 6 months, understory removal (UR) in both plantations had greatly increased soil surface luminous intensity (90–500 cd) and temperature (0.5–0.8 °C); soil moisture was reduced in the Eucalyptus plantation but not in the Acacia plantation. Understory removal also reduced soil organic matter (SOM), but had little impact on other soil chemical properties, including total phosphorus, C/N, pH, exchangeable cations (K, Ca, Mg), available P, ande extractable NH4–N and NO3–N. We found a significant decline of soil N mineralization and nitrification rates in the 0–5 cm soils of UR in both plantations. The decline of SOM in UR may contribute to the lower N transformations rates. This study indicates that a better understanding of understory vegetation effects on soil N cycling would be beneficial to forest management decisions and could provide a critical foundation for advancing management practices.

作 者:Faming Wang, Bi Zou, Haifang Li, Zhian Li
期刊名称: Journal of Forest Research
期卷页: 第卷 第期 页
学科领域:生命科学 » 生态学 » 分子与进化生态学
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原文链接:http://link.springer.com/article/10.1007/s10310-013-0395-0
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