贾建相, 黄勇, 徐圆圆, 等. 杉木林下套种草珊瑚对土壤浸提物挥发性有机物、土壤养分及酶活性的影响[J]. 西南林业大学学报(自然科学), 2025, 45(1): 1–13 . DOI: 10.11929/j.swfu.202401007
引用本文: 贾建相, 黄勇, 徐圆圆, 等. 杉木林下套种草珊瑚对土壤浸提物挥发性有机物、土壤养分及酶活性的影响[J]. 西南林业大学学报(自然科学), 2025, 45(1): 1–13 . DOI: 10.11929/j.swfu.202401007
Jia Jianxiang, Huang Yong, Xu Yuanyuan, Yang Mei. Effects of interplanting Sarcandra glabra under Cunninghamia lanceolata plantation on volatile organic compounds in soil leachate, and on soil nutrients and enzyme activities[J]. Journal of Southwest Forestry University. DOI: 10.11929/j.swfu.202401007
Citation: Jia Jianxiang, Huang Yong, Xu Yuanyuan, Yang Mei. Effects of interplanting Sarcandra glabra under Cunninghamia lanceolata plantation on volatile organic compounds in soil leachate, and on soil nutrients and enzyme activities[J]. Journal of Southwest Forestry University. DOI: 10.11929/j.swfu.202401007

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杉木林下套种草珊瑚对土壤浸提物挥发性有机物、土壤养分及酶活性的影响

Effects of interplanting Sarcandra glabra under Cunninghamia lanceolata plantation on volatile organic compounds in soil leachate, and on soil nutrients and enzyme activities

  • 摘要: 以杉木−草珊瑚套种林和杉木纯林作为研究对象,分析林下套种对根际和非根际土壤浸提物挥发性有机物(VOCs)、土壤养分、酶活性及三者间关系的影响。采用气相色谱−质谱(GC−MS)法测定杉木纯林的根际土壤和非根际土壤(分别记为CS和FS)以及套种林中杉木和草珊瑚的根际土壤(分别记为CS1和GS)、非根际土壤(记为FS1)的浸提物中VOCs,并测定土壤养分和酶活性。结果表明:2种林分土壤浸提物中共检测出63种VOCs,仅有2种(2,4−二叔丁基苯酚、十五烷)共有性成分;CS、CS1、GS、FS1土壤VOCs均以烃类和酚类为主,FS土壤VOCs主要是酯类和有机硅类。聚类分析表明,CS、GS、CS1聚为1类,FS1、FS各为1类;纯林和套种林的杉木根际、非根际土壤浸提物VOCs共有性差异成分6种。套种林的杉木根际与非根际土壤的全氮、全磷、铵态氮、有效磷含量以及土壤蔗糖酶、脲酶活性均高于杉木纯林,且达到显著水平(P<0.05),均与VOCs共有性差异成分(2,4−二叔丁基苯酚、二十八烷)有显著的正相关性。在套种草珊瑚后杉木林土壤浸提物VOCs种类数均高于杉木纯林,主要以烃类和酚类为主;其中以2,4−二叔丁基苯酚为主的VOCs对土壤养分、土壤酶活性有一定的促进作用,杉木林下套种草珊瑚后林地土壤肥力得到一定程度地改善。

     

    Abstract: The research focused on comparing the changes in volatile organic compounds (VOCs) in soil leachate, soil nutrients and enzyme activities, as well as their relationships between pure plantations of Cunninghamia lanceolata and interplanted plantations of Sarcandra glaba under C. lanceolata. This study provides a scientific basis for understanding the impact of understory planting on the soil chemical environment. The study examined differences in VOCs in extracts from rhizosphere and non-rhizosphere soil (denoted as CS and FS, respectively) of pure plantations of C. lanceolata, and the rhizosphere soil of C. lanceolata and S. glaba (denoted as CS1 and GS, respectively), and the non-rhizosphere soil (denoted as FS1) shared by these two species in the interplanting stands. Furthermor, soil nutrient content and enzyme activities were also determined. Differences in soil VOCs between pure plantations and interplanted stands were analyzed, and key VOCs causing the differences were screened to reveal their correlation with soil nutrient content and enzyme activities. Results showed that (1) A total of 63 VOCs were detected in the soil extracts of pure stands and interplanted stands, with only 2 VOCs (2,4−Di-tert-butylphenol and pentadecane) being common components. The soil extracts from CS, CS1, GS, and FS1 mainly contained hydrocarbons and phenols as VOCs, while esters and organosilicones were predominant in the FS soil. (2) Cluster analysis showed that CS, GS and CS1 were clustered into one class, and FS1 and FS were each in one class; there were six shared components of VOCs in the leachate of rhizosphere and non rhizosphere from pure and interplanted stands of C. lanceolata. (3) The contents of total nitrogen, total phosphorus, ammonium nitrogen, available phosphorus in both rhizosphere and non-rhizosphere soils showed significantly higher levels in interplanted plantations compared to pure C. lanceolata plantations (P < 0.05). These levels were also positively correlated with specific VOC components (2,4−Di-tert-butylphenol and octacosane), along with increased activities of sucrase and urease enzymes. The types of VOCs in soil extracts from C. lanceolata plantations after interplanting with S. glaba were higher compared to pure C. lanceolata plantations, predominantly hydrocarbons and phenols. Among these compounds, specifically VOCs, mainly 2,4−Di-tert-butylphenol, exhibited a discernible promotion effect on soil nutrients and soil enzyme activity. The soil fertility of forest land was improved to some extent after interplanting S. glaba under C. lanceolata forest.

     

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