ZHANG Shuilin,MA Lina,WANG Yan,et al.Characteristics of Soil Carbon, Nitrogen and Phosphorus Stoichiometry and Enzyme Activity Under Different Ecological Restoration Types of Rocky Desertification in Fault Basin[J].Research of Soil and Water Conservation,2023,30(04):69-74.[doi:10.13869/j.cnki.rswc.2023.04.010.]
断陷盆地不同石漠化生态修复类型下土壤碳氮磷化学计量及酶活性特征
- Title:
- Characteristics of Soil Carbon, Nitrogen and Phosphorus Stoichiometry and Enzyme Activity Under Different Ecological Restoration Types of Rocky Desertification in Fault Basin
- 文章编号:
- 1005-3409(2023)04-0069-06
- Keywords:
- rocky desertification; stoichiometric characteristics; enzyme activity; fault basin; ecological restoration
- 分类号:
- S714.2
- 文献标志码:
- A
- 摘要:
- [目的]揭示断陷盆地石漠化生态修复区土壤养分、酶活性特征,筛选修复效果较好的模式,为石漠化修复治理提供科技支撑。[方法]以典型断陷盆地云南省建水县为研究区,探究4种植被修复类型(云南松+银木荷人工混交林、柏木+银木荷人工混交林、干香柏人工纯林、自然植被恢复样地)的土壤碳、氮、磷含量和化学计量特征及酶活性特征(淀粉酶、脱氢酶、葡萄糖苷酶、酸性磷酸酶、FDA水解酶、脲酶)。[结果]土壤有机碳、全氮、全磷平均质量分数分别为25.81,1.89,0.41 g/kg,有机碳、全氮含量均为自然植被恢复下最高,全磷含量为干香柏纯林下最高; 自然植被恢复下土壤C:P与N:P最高,C:N最高的为柏木+银木荷混交林。土壤淀粉酶活性为干香柏人工纯林最高,自然恢复植被恢复下最低,其余酶活性均为自然植被恢复下最高。相关性分析表明,土壤有机碳、全氮、全磷、pH值会对土壤酶活性产生影响,且冗余分析结果显示影响土壤酶活性的最主要养分因子为全氮,解释了72.3%的土壤酶活性变异。[结论]不同植被修复模式下土壤养分及酶活性特征不同,经18 a植被修复后,自然植被恢复和干香柏人工纯林两种修复模式下土壤养分条件较好,是该地区较为合适的植被修复类型。
- Abstract:
- [Objective] The characteristics of soil nutrients and enzyme activities in the rocky desertification ecological restoration area of the fault basin were revealed, and the model with better restoration effect was screened to provide scientific and technological support for the restoration and treatment of rocky desertification. [Methods] The soil carbon, nitrogen and phosphorus contents and stoichiometric characteristics and enzyme activity characteristics(amylase, dehydrogenase, glucosidase, acid phosphatase, FDA hydrolase, urease)of four vegetation restoration types(Pinus yunnanensis+Schima argentea artificial mixed forest, Cupressus funebris Endl.+Schima argentea artificial mixed forest, Copressus duclouxiana artificial pure forest, natural vegetation restoration sample plots)were investigated in the study area of Jianshui County, Yunnan Province, a typical faulted basin. [Results] The average contents of soil organic carbon, total nitrogen and total phosphorus were 25.81 g/kg, 1.89 g/kg and 0.41 g/kg, respectively. The contents of organic carbon and total nitrogen were the highest under natural vegetation restoration, and the content of total phosphorus was the highest under dry cedar pure forest. Under natural vegetation restoration, soil C:P and N:P were the highest, and C:N was the highest in the Cupressus funebris Endl.+Schima argentea artificial mixed forest. Soil enzyme activity was different under different vegetation restoration. Soil amylase activity was highest in Copressus duclouxiana artificial pure forest, lowest in natural vegetation restoration, its enzyme activity was the highest under natural vegetation restoration. Correlation analysis showed that soil organic carbon, total nitrogen, total phosphorus and pH value had effects on soil enzyme activity. Redundancy analysis showed that the main nutrient factor affecting soil enzyme activity was total nitrogen, which explained 72.3% of soil enzyme activity variation. [Conclusion] The characteristics of soil nutrients and enzyme activities were different under different vegetation restoration modes. After 18 years of vegetation restoration, the soil nutrient conditions were better under the two restoration modes of natural vegetation restoration and dry cedar artificial pure forest, which were more suitable for vegetation restoration in this area.
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备注/Memo
收稿日期:2022-04-13 修回日期:2022-05-23
资助项目:云南省科技计划面上项目“典型苔藓植物对石漠化地区高钙环境的适应机制及生态修复意义”(202001AT070115)
第一作者:张水琳(1997—),女,云南宣威人,硕士研究生,研究方向为石漠化治理。E-mail:1770728218@qq.com
通信作者:王妍(1980—),女,河北承德人,博士,副教授,主要从事脆弱生态系统恢复研究。E-mail:wycaf@126.com