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应用生态学报 ›› 2010, Vol. 21 ›› Issue (04): 1031-1037.

• 研究报告 • 上一篇    下一篇

向家坝水电站工程扰动区不同类型边坡土壤酸碱度与肥力分析

周明涛1,2**,许文年2,夏栋2   

  1. 1武汉大学水利水电学院| 武汉 430072; 2三峡大学三峡库区地质灾害教育部重点实验室| 湖北宜昌 443002
  • 出版日期:2010-04-20 发布日期:2010-04-20

Soil pH value and fertility level at various types of slopes in disturbed area of Xiangjiaba hydropower construction.

ZHOU Ming-tao1,2|XU Wen-nian2|XIA Dong2   

  1. 1College of Water Resources and Hydroelectric Engineering, Wuhan University, Wuhan 430072, China|2Key Laboratory of Geological Hazards in Three Gorges Reservoir Area, Yichang 443002, Hubei, China
  • Online:2010-04-20 Published:2010-04-20

摘要: 对向家坝水电站工程扰动区7种不同类型边坡土壤的酸碱度(pH)进行检测,并运用标准综合级别法对其肥力状况进行分析.结果表明:在向家坝水电站工程扰动区,植被混凝土边坡土壤呈微碱性,其他边坡土壤均呈不同程度的酸性,土壤pH值依次为:植被混凝土(7.68±0.04)>弃渣地(6.96±0.02)>框格梁覆土(6.93±0.16)>客土喷播(6.75±0.35)>厚层基材(6.67±0.36)>天然次生林(5.68±1.25)>天然林(4.71±0.23);不同类型边坡土壤肥力的综合级别值大小为: 植被混凝土(3.06±0.02)<厚层基材(4.06±0.78)<天然林(4.20±0.10)<天然次生林(4.32±0.16)<框格梁覆土(4.62±0.06)< 客土喷播(4.90±0.01)<弃渣地(5.00±0.10),植被混凝土肥力状况最佳,弃渣地肥力状况最差.采用人工修复技术添加的水泥、复合肥及腐殖质在调节边坡土壤pH值和维持其肥力方面起到一定的作用,可为植被生长提供良好的土壤条件.

关键词: 土壤酸碱度, 土壤肥力, 标准综合级别法, 边坡, 向家坝水电站, 果园, 生草, 土壤肥力, 可持续发展

Abstract: Taking seven types of slopes in the disturbed area of Xiangjiaba construction as test objects, this paper measured their soil pH, and evaluated their soil fertility with standard integrated grade method. The soil at vegetation-growing concrete gunning (VGCG) was weakly alkaline, while the others were acidic at different degree. The soil pH value was decreased in the sequence of VGCG (7.68±0.04)> discarded residue (DR) (6.96±0.02)> framed beams with soil cover (FBSC)(6.93±0.16)> external soil with spray seeding (ESS)(6.75±0.35)> thick layer substrate (TLS)(6.67±0.36)> natural secondary forest (NSF)(5.68±1.25)> natural forest (NF)(4.71±0.23); while the integrated index of soil fertility was in the order of VGCG (3.06±0.02)< TLS(4.06±0.78)< NSF(4.52±0.16)< FBSC(4.62±0.06)< NF(4.62±0.06)< ESS(4.90±0.01)< DR(5.00±0.10). It proved that some artificial additives such as cement, compound fertilizer, and humus had definite positive effects in adjusting soil pH and maintaining soil fertility, being helpful to provide favorable soil condition for plant growth.

Key words: soil pH, soil fertility, standard integrated grade method,  slope, Xiangjiaba hydropower construction, orchard, grass, soil fertility, sustainable development