方培, 胡海波, 王霞, 等. 不同林龄麻栎人工林土壤生态化学计量特征研究[J]. 西南林业大学学报(自然科学), 2022, 42(2): 39–47 . DOI: 10.11929/j.swfu.202103046
引用本文: 方培, 胡海波, 王霞, 等. 不同林龄麻栎人工林土壤生态化学计量特征研究[J]. 西南林业大学学报(自然科学), 2022, 42(2): 39–47 . DOI: 10.11929/j.swfu.202103046
Fang Pei, Hu Haibo, Wang Xia, Chen Jianyu, Ruan Cunxin, Jia Xichuan. Soil Ecological Stoichiometry Characteristics of Different Aged Quercus acutissima Plantations[J]. Journal of Southwest Forestry University, 2022, 42(2): 39-47. DOI: 10.11929/j.swfu.202103046
Citation: Fang Pei, Hu Haibo, Wang Xia, Chen Jianyu, Ruan Cunxin, Jia Xichuan. Soil Ecological Stoichiometry Characteristics of Different Aged Quercus acutissima Plantations[J]. Journal of Southwest Forestry University, 2022, 42(2): 39-47. DOI: 10.11929/j.swfu.202103046

不同林龄麻栎人工林土壤生态化学计量特征研究

Soil Ecological Stoichiometry Characteristics of Different Aged Quercus acutissima Plantations

  • 摘要: 以江苏省句容市不同林龄(18、30、45、67 a)麻栎人工林为研究对象,测定土壤及其微生物生物量碳及氮、磷含量,并分析其生态化学计量特征。结果表明:随林龄的增长,麻栎林土壤有机碳(SOC)和全氮(TN)含量增加,而土壤全磷(TP)呈先增加后减小的趋势,且处于较低含量水平(土壤TP含量均值为0.42 g/kg)。不同林龄之间土壤生态化学计量比差异不显著,土壤C/P平均值(80.09)远高于全国平均水平(52.7)。随林龄的增长,麻栎林土壤微生物生物量碳(MBC)及氮(MBN)、磷(MBP)含量总体呈增加趋势,土壤微生物生态化学计量比在林龄之间的差异性不显著。土壤微生物生物量碳氮磷与土壤碳氮磷含量之间呈极显著正相关;而土壤TP与MCB/MBP、MBN/MBP显著负相关;土壤MBP与C/P、N/P显著负相关。因此,麻栎林土壤表现出全磷和有效磷的匮乏,林分生长受到磷的严重制约;土壤微生物生物量受土壤养分影响,且二者存在显著的生态化学计量耦合关系。本研究有利于系统、全面地揭示麻栎人工林生态系统土壤养分状况,对麻栎林合理经营、养分调控及生产力提高等具有指导作用。

     

    Abstract: Taking Quercus acutissima plantations of different forest ages(18, 30, 45, 67 a) in Jurong City, Jiangsu Province as the research objects, the contents of soil and microbial biomass carbon, nitrogen and phosphorus were measured, and the ecological stoichiometry characteristics were analyzed. The results showed that with the increase of forest age, the contents of soil organic carbon(SOC) and total nitrogen(TN) increased, while the total phosphorus(TP) increased first and then decreased, and was at a low level(the average TP content was 0.42 g/kg). There was no significant difference in soil ecological stoichiometry among different forest ages. There was a highly significant positive correlation between MBC, MBN and MBP and SOC, TN and TP content. Soil TP was significantly negatively correlated with MCB / MBP and MBN / MBP; soil MBP was significantly negatively correlated with C / P and N / P. In summary, the soil of Q. acutissima forest showed a lack of total phosphorus and available phosphorus, and the stand growth was severely restricted by phosphorus. Soil microbial biomass of Q. acutissima forest was influenced by soil nutrient content, and there was a significant ecological stoichiometry coupling relationship between them. This study was conducive to systematically and comprehensively revealing the soil nutrient status of Q. acutissima plantations, and guiding the rational management, nutrient regulation and productivity improvement of Q. acutissima plantations.

     

/

返回文章
返回