| 摘要: |
| 为探究广东莲花山土壤有机碳（C）、氮（N）、磷（P）、钾（K）含量垂直分布特征，阐明土壤C、N、P、K生态化学计量学特征对海拔梯度的响应规律，在广东莲花山500~1 000 m区域以100 m海拔间隔进行研究。结果表明：（1）不同海拔下土壤有机碳、全氮、全磷、全钾变化范围分别是38.72~68.17、0.90~1.32、0.011~0.022、5.19~7.08 g·kg-1，土壤全氮、全磷含量随海拔梯度升高而增加，土壤有机碳、全钾含量随海拔梯度的变化，差异不显著。（2）土壤的C/N和N/P分别介于40.12~50.76、43.06~90.86间。不同海拔梯段下土壤C/N无显著差异;整体来看，土壤N/P随海拔梯度的增加呈降低趋势。（3）500~1 000 m海拔土壤速效氮含量介于0.81~2.01 mg·kg-1，均值为1.19 mg·kg-1，其中，500 m海拔下土壤速效氮含量最高，1 000 m海拔下，土壤速效氮含量值达到最小。土壤速效氮含量与土壤速效氮含量的关系呈负相关。土壤速效钾、速效磷含量在500~800 m海拔间变化幅度较小，至900 m海拔下最大。莲花山土壤养分空间分布具有一定的异质性，全氮、全磷、速效氮含量、N/P的空间变化强烈。 |
| 关键词: 海拔梯度 广东莲花山 土壤养分 化学计量特征 |
| DOI： |
| 分类号: |
| 基金项目:省级自然保护区生态监测项目 |
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| Soil Nutrients and Stoichiometric Characteristics along Altitude of Lianhua Mountain in Guangdong Province |
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GOU Xiao and Zhang Meng
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Lingnan Integrated Exploration and Design Institute of Guangdong,Guangzhou,Guangzhou Linfang Ecological Science Technology Limited Company
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| Abstract: |
| In the current study, we evaluated the status of soil carbon (C), nitrogen (N), phosphorus (P) andpotassium (K), and also the C, N, P ecological stoichiometry along the altitude within the range from 500 m to1 000 m (100 m altitude span) in Lianhua mountain. The results showed that the concentration of organic C, total N,total P, total K at different altitude varied in the range of 38.72~68.17, 0.90~1.32, 0.011~0.022, 5.19~7.08 g·kg,respectively. The content of total N and total P generally increased with increased altitude, while organic C andtotal K concentration had relatively little variation. Soil C/N ratio and N/P ratio varied between 40.12 and 50.76,43.06 and 90.86, respectively. There was no signi?cant difference in soil C/N ratio among the different altitude within 500 m to 1 000 m. In general, soil N/P ratio tended to decrease with the increased altitude. Soil available N ranged from 0.81 to 2.01 g·kg along the altitude of 500~1 000 m, with an average of 1.19 g·kg. Along the altitude, soil available N tended to decline with rising altitude from 500 to 1 000 m. Soil available K and P were in the highest values at the altitude of 900 m, but ?uctuates a little within the altitude of 500~800 m. |
| Key words: altitude gradient Lianhua mountain soil nutrients stoichiometry |
