| 摘要: |
| 为了解深圳大鹏半岛国家地质公园林地土壤的现实肥力水平和生产潜力，利用实验分析与数据统计整理的方法，分析了该园区土壤的基本理化性质与土壤生态评价。结果表明：1）研究区域土壤主要以少砾质与中砾质壤土为主，占园区 65% 以上；2）土壤容重 1.10~1.35 g/cm3，自然含水量59.49~402.15 g/kg，毛管持水量102.00~859.95 g/kg，pH 值 4.01~5.27，有机质含量 0.32~45.85 g/kg，全氮含量 0.02~7.74 g/kg，速效磷含量 0.01~8.29 mg/kg，碳氮比 1.63~53.61；3）按照不同土壤深度划分，研究区域土壤理化性质呈现不同程度的规律性，毛管持水量呈自上而下递减规律；土壤容重与毛管持水量呈相反规律呈自上而下依次递增；有机质、全氮、速效磷含量特征是随着土层深度的增加而逐层下降；4）单因子指数与内梅洛综合指数评价结果显示，研究区域重金属元素单因子污染指数为 Pb ＞ Zn ＞ Cr、Cu、Ni ＞ Cd ＞ As ＞ Hg，指数均小于污染评价限值（Pi=1.0）；内梅罗综合值为土层 0~20 cm ＞ 20~40 cm ＞ 40~60 cm，且均小于污染标准限值（P=0.7）。该园区内土壤通气性、保水保肥性能良好，养分供应状况正常，环境质量优秀，具有较好的生产潜力。 |
| 关键词: 深圳大鹏半岛 土壤 理化性质 生态评价 |
| DOI： |
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| 基金项目:深圳大鹏半岛国家地质公园植被与地质环境协同演化研究项目（SZDL2020334205）；广东省林木种质资源普查（GDZZDC20228703）,其它 |
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| Analysis of Soil Physical and Chemical Properties and Ecological Evaluation of Dapeng Peninsula National Geopark in Shenzhen |
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zhanghaohua, Ye-qiang, Bao-ziyu, Chen-Ziluan, Yang-haijun, Li-wei, Yu-xinhua
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South China Agricultural University
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| Abstract: |
| To understand the actual fertility level and production potential for the forest soil in the Shenzhen Dapeng Peninsula National Geopark, the basic physical and chemical properties and soil ecological evaluation of the soil in the park were analyzed by using experimental analysis and statistical data compilation. The results showed that: 1）The soil in the study area is mainly loamy soil with less gravel and medium gravel, accounting for more than 65% of the park. 2）The soil bulk density ranged from 1.10 to 1.35 g/cm3, the natural water content was 59.49-402.15 g/kg, and the capillary water holding capacity from 102.00 to 859.95 g/kg, pH value was 4.01-5.27, the organic matter content was 0.32-45.85 g/kg, the total nitrogen content was 0.02-7.74 g/kg, the available phosphorus content was 0.01-8.29 mg/kg, and the carbon-nitrogen ratio was 1.63-53.61. 3）The soil physical and chemical properties of the study area showed different degrees of regularity according to different soil depths, and the capillary water holding capacity showed a decreasing law from top to bottom. The soil bulk density and capillary water holding capacity showed an opposite law and increased sequentially from top to bottom. The characteristics of total nitrogen and available phosphorus content decrease layer by layer with the increase of soil depth. 4）The evaluation results from single-factor index and Nemero composite index showed that the single-factor pollution index of heavy metal
elements in the study area was Pb>Zn>Cr, Cu, Ni>Cd>As>Hg, and the indices were all less than the pollution assessment limit（Pi=1.0）. The comprehensive value of Nemero was 0-20 cm> 20-40 cm> 40-60 cm in the soil layer, and all of them were less than the pollution standard limit（P 综 = 0.7）. This park has good soil aeration, water, and fertilizer retention, normal nutrient supply condition, excellent environmental quality, and good production potential. |
| Key words: Dapeng Peninsula soil physicochemical properties ecological evaluation |
