刘 烨, 秦 娟, 毕庆康, 陈立楠, 张博文. 北亚热带大别山区不同马尾松林型土壤酶活性及其化学计量比[J]. 土壤通报, 2024, 55(5): 1416 − 1428. DOI: 10.19336/j.cnki.trtb.2023061101
引用本文: 刘 烨, 秦 娟, 毕庆康, 陈立楠, 张博文. 北亚热带大别山区不同马尾松林型土壤酶活性及其化学计量比[J]. 土壤通报, 2024, 55(5): 1416 − 1428. DOI: 10.19336/j.cnki.trtb.2023061101
LIU Ye, QIN Juan, BI Qing-kang, CHEN Li-nan, ZHANG Bo-wen. Soil Enzyme Activities and Its Stoichiometric Ratio of Different Pinus Massoniana Forest Types in Dabie Mountains, North Subtropical Region[J]. Chinese Journal of Soil Science, 2024, 55(5): 1416 − 1428. DOI: 10.19336/j.cnki.trtb.2023061101
Citation: LIU Ye, QIN Juan, BI Qing-kang, CHEN Li-nan, ZHANG Bo-wen. Soil Enzyme Activities and Its Stoichiometric Ratio of Different Pinus Massoniana Forest Types in Dabie Mountains, North Subtropical Region[J]. Chinese Journal of Soil Science, 2024, 55(5): 1416 − 1428. DOI: 10.19336/j.cnki.trtb.2023061101

北亚热带大别山区不同马尾松林型土壤酶活性及其化学计量比

Soil Enzyme Activities and Its Stoichiometric Ratio of Different Pinus Massoniana Forest Types in Dabie Mountains, North Subtropical Region

  • 摘要:
    目的 研究北亚热带大别山区不同马尾松林型生长季土壤养分和酶活性的差异及变化规律,探究不同生长季影响林地土壤养分循环及酶活性的主要因子。
    方法 以大别山区马尾松(Pinus massoniana)纯林、马尾松-枫香(Liquidambar formosana)混交林、马尾松-化香(Platycarya strobilacea)混交林和马尾松-麻栎(Quercus acutissima)混交林为研究对象,测定了7月和9月4种林型林地土壤pH值、肥力相关指标以及土壤纤维素酶(S-CL)、蔗糖酶(S-SC)、酸性蛋白酶(S-ACPT)、脲酶(S-UE)和酸性磷酸酶(S-ACP)活性,分析土壤酶活性及其化学计量比与土壤pH值和肥力相关指标间的相关关系。
    结果 ①马尾松-麻栎混交林土壤全氮(TN)和有机碳(SOC)含量在7月和9月均显著高于其它3种林型;马尾松-化香混交林土壤硝态氮(NO3-N)含量在在7月和9月均为4种林型最高值。②7月和9月,马尾松-麻栎混交林土壤S-SC和S-ACPT活性均显著高于其它3种林型,马尾松-化香混交林土壤酶C∶P和酶N∶P均高于其它3种林型;4种林型土壤S-CL活性表现为7月 > 9月。③相关性分析表明:7月,土壤S-CL和S-UE活性与土壤pH值、TN、全磷(TP)和SOC含量间均呈极显著正相关,土壤S-SC、S-ACPT活性及酶向量长度(VL)与土壤铵态氮(NH4 + -N)含量呈显著正相关;9月,土壤S-CL、S-UE、S-ACPT和S-ACP活性与土壤TN、TP和SOC含量呈极显著正相关,酶C∶P、酶N∶P及VL与土壤C∶N、C∶P呈极显著负相关。④冗余分析表明,土壤TP、SOC和NO3-N含量对土壤酶活性及其化学计量比贡献显著,是影响土壤酶活性及其化学计量比的主要因子。
    结论 4种马尾松林型中,马尾松-枫香混交林和马尾松-麻栎混交林能有效提高林地土壤养分含量和酶活性水平,促进混交林地的土壤养分循环。

     

    Abstract:
    Objective The aims were to investigate the differences and variations in soil nutrients and enzyme activities in different Pinus massoniana forest types in Dabie Mountains of North Subtropical region and to explore the main factors influencing soil nutrient cycling and enzyme activities in growing seasons.
    Method This study focused on pure Pinus massoniana forest, Pinus massoniana-Liquidambar formosana mixed forest, Pinus massoniana-Platycarya strobilacea mixed forest, and Pinus massoniana-Quercus acutissima mixed forest. Soil pH, fertility-related indicators, and the activities of soil cellulase (S-CL), sucrase (S-SC), acid protease (S-ACPT), urease (S-UE), and acid phosphatase (S-ACP) in July and September were measured. The correlations between soil enzyme activities, stoichiometric ratio, and soil pH and fertility-related indicators were analyzed.
    Result ① The soil total nitrogen and organic carbon content of Pinus massoniana-Quercus acutissima mixed forest were significantly higher than those of the other three forest types in July and September. The soil nitrate nitrogen content of Pinus massoniana-Platycarya strobilacea mixed forest was the highest among the four forest types during different growing seasons. ② In July and September, the soil S-SC and S-ACPT activities of Pinus massoniana-Quercus acutissima mixed forest were significantly higher than those of the other three forest types. The soil enzyme activities in the same Pinus massoniana forest type during different growing seasons showed that the S-CL activity of the four forest types was higher in July than in September. The enzyme C∶P ratio, enzyme N∶P ratio of Pinus massoniana-Platycarya strobilacea mixed forest were higher than those of the other three forest types. ③The correlation analysis showed that in July, soil S-CL and S-UE activities were significantly positively correlated with soil pH, total nitrogen, total phosphorus, and organic carbon content. Soil S-SC, S-ACPT activities, and enzyme vector length were significantly positively correlated with soil ammonium nitrogen content. In September, soil S-CL, S-UE, S-ACPT, and S-ACP activities were significantly positively correlated with soil total nitrogen, total phosphorus, and organic carbon content. The enzyme C∶P ratio, N∶P ratio, and enzyme vector length were significantly negatively correlated with soil C∶N and C∶P ratio. ④ Redundancy analysis indicated that soil total phosphorus, organic carbon, and nitrate nitrogen content significantly contributed to soil enzyme activity and stoichiometric ratio, and were the main factors affecting soil enzyme activity and stoichiometric ratio.
    Conclusion Among the four Pinus massoniana forest types, Pinus massoniana-Liquidambar formosana mixed forest and Pinus massoniana-Quercus acutissima mixed forest effectively improved soil nutrient levels and enzyme activity, promoting soil nutrient cycling in mixed forests.

     

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