Zhu Yan,Zhai Bochao,Sun Meimei,et al.Soil Physicochemical Properties and Stoichiometry Characteristics in Robinia pseudoacacia and Pinus tabuliformis Plantations Across Different Densities in the Loess Hilly Region[J].Research of Soil and Water Conservation,2023,30(06):160-167.[doi:10.13869/j.cnki.rswc.2023.06.037]
黄土丘陵区不同密度刺槐和油松人工林土壤理化性质与化学计量特征
- Title:
- Soil Physicochemical Properties and Stoichiometry Characteristics in Robinia pseudoacacia and Pinus tabuliformis Plantations Across Different Densities in the Loess Hilly Region
- 文章编号:
- 1005-3409(2023)06-0160-08
- Keywords:
- loess hilly; Robinia pseudoacacia; Pinus tabuliformis; plantation forest; soil physicochemical properties
- 分类号:
- S714.2
- 文献标志码:
- A
- 摘要:
- [目的]探明黄土丘陵区刺槐(Robinia pseudoacacia)和油松(Pinus tabuliformis)人工林土壤理化性质及化学计量特征对林分密度的响应特征,为黄土丘陵地区人工林经营提供科学依据。[方法]试验测定分析两种人工林土壤容重、含水量、土壤有机碳(SOC)、全氮(TN)和全磷(TP)含量,利用单因素方差分析方法,开展各指标随不同密度梯度的变化特征及垂直变化特征研究,利用多因素相关分析方法分析了各指标间的相关关系。[结果](1)在垂直分布特征上,各林分SOC和TN含量都呈现随土层深度增加而显著减小的趋势; 土壤容重和TP含量无明显规律且无显著差异。(2)刺槐林密度对土壤容重、含水量、N:P等指标影响不显著; 低密度刺槐林的SOC,TN,TP,C:N均显著高于其他密度刺槐林。(3)油松林密度对土壤容重,C:N,C:P,N:P等指标影响不显著; 高密度油松林的SOC,TN,TP含量显著高于其他密度油松林。(4)同一密度下,刺槐林的土壤容重、含水量大于油松林; SOC,TN,C:N,C:P,N:P均低于油松林,除C:N外,差异均显著。[结论]低密度刺槐林的SOC,TN,TP含量较高,而高密度油松林的SOC,TN,TP含量较高,且油松林的土壤质量相对优于刺槐林。
- Abstract:
- [Objective] The aims of this study are to explore the response characteristics of soil physical and chemical properties and stoichiometric characteristics to stand density of Robinia pseudoacacia and Pinus tabuliformis plantations in loess hilly region, and to provide scientific basis for plantation management in loess hilly region. [Methods] The soil bulk density, water content, soil organic carbon(SOC), total nitrogen(TN)and total phosphorus(TP)contents of two plantations were measured and analyzed. The variation characteristics and vertical variation characteristics of each index with different density gradients were studied by single factor variance analysis method, and the correlation between each index was analyzed by multi-factor correlation analysis method. [Results](1)In the vertical distribution characteristics, the SOC and TN contents of each stand showed a significant decreasing trend with the increase of soil depth. There was no significant difference in soil bulk density and TP content.(2)Robinia pseudoacacia forest density had no significant effect on soil bulk density, water content, N:P and other indicators. SOC, TN, TP and C:N of low density Robinia pseudoacacia forest were significantly higher than those of other densities.(3)Pinus tabulaeformis forest density had no significant effect on soil bulk density, C:N, C:P, N:P and other indicators. The contents of SOC, TN and TP in high density pine forest were significantly higher than those in other density pine forest.(4)Under the same density, the soil bulk density and water content of Robinia pseudoacacia forest were higher than those of Pinus tabulaeformis forest. The SOC, TN, C:N, C:P, N:P were lower than those of Pinus tabulaeformis forest, except for C:N, the differences were significant. [Conclusion] The contents of SOC, TN and TP in low-density Robinia pseudoacacia forest were higher, while the contents of SOC, TN and TP in high-density Pinus tabulaeformis forest were higher, and the soil quality of Pinus tabulaeformis forest was relatively better than that of Robinia pseudoacacia forest.
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备注/Memo
收稿日期:2022-07-27 修回日期:2022-09-18
资助项目:中国科学院野外站联盟课题(KFJ-SW-YW034-03); 中国科学院战略性先导科技专项课题(XDA05050202)
第一作者:朱燕(1994—),女,甘肃酒泉人,硕士研究生,研究方向为植被恢复与森林生态系统过程。E-mail:2627046190@qq.com
通信作者:杜盛(1965—),男,内蒙古鄂尔多斯人,博士,研究员,主要从事植被恢复与森林生态系统过程研究。E-mail:shengdu@ms.iswc.ac.cn