RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2020, Vol. 29 >> Issue (9): 2005-2015.doi: 10.11870/cjlyzyyhj202009011

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Characteristics of Soil Nutrients and Soil Enzyme Activities in Different Restoration Models of Xiangjiaba Project

YAN Yu-jie 1,2,XIA Lu 2,ZHAO Bing-qin 2,XU Wen-nian 2,XIA Dong 3   

  1. (1. College of Biology and Pharmaceutics,China Three Gorges University,Yichang 443002,China;
    2. Research Center for slope protection and ecological restoration,China Three Gorges University,Yichang 443002,China)
  • Online:2020-09-20 Published:2020-09-30

Abstract: Soil nutrients and soil enzyme activities are important indicators of soil quality evaluation. In order to clarify the characteristics of soil nutrients and soil enzyme activities of restored slopes in disturbed area of Xiangjiaba Project, four types of artificial restoration slopes were studied: vegetation concrete (CBS), thick base material (TBS), outside soil soil spraying (OSS) and frame beams soil covering (FBS). The soil nutrient content, soil enzyme activities and their correlations were measured and analyzed with natural forest (NF) slope as control. The results showed that: (1) soil pH of the four artificial restoration slopes was higher than that of NF; (2) soil total nutrients and available phosphorus contents of CBS and TBS were significantly higher than those of OSS, FBS and NF; TBS showed obvious advantages of soil nitrogen nutrition, CBS showed obvious advantages of soil phosphorus nutrition; the overall nutrient levels of OSS and FBS were lower; (3) the activities of invertase, catalase and polyphenol oxidase were higher than those of NF in artificial restoration plots, while there were no significant differences in soil urease, invertase, cellulase and phosphatase activities between OSS and FBS; (4) the current status of TBS was close to NF; OSS and FBS showed significant correlation in soil nutrient and soil enzyme activity as well. In summary, CBS and TBS had better effects on soil nutrient persistence and soil enzyme activities of disturbed slope of Xiangjiaba Project and TBS was moving in the direction of the development tendency of NF, while OSS and FBS had positive effects on soil enzyme activities but relatively poor impact on nutrient accumulation.

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