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应用生态学报 ›› 2020, Vol. 31 ›› Issue (1): 17-24.doi: 10.13287/j.1001-9332.202001.007

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红壤侵蚀退化马尾松林下不同治理模式土壤化学计量特征

王玉婷, 查轩*, 陈世发, 白永会, 毛兰花, 常松涛   

  1. 福建师范大学地理科学学院/湿润亚热带生态-地理过程教育部重点实验室, 福州 350007
  • 收稿日期:2019-10-14 出版日期:2020-01-15 发布日期:2020-01-15
  • 通讯作者: E-mail: xzha@fjnu.edu.cn
  • 作者简介:王玉婷, 女, 1995年生, 硕士研究生。主要从事水土保持与生态恢复研究。E-mail: w18059625706@163.com
  • 基金资助:
    国家重点研发计划项目(2017YFC0505400)和国家科技支撑计划项目(2014BAD15B02)

Soil stoichiometry of Pinus massoniana forest in red soil erosion area under different management patterns

WANG Yu-ting, ZHA Xuan*, CHEN Shi-fa, BAI Yong-hui, MAO Lan-hua, CHANG Song-tao   

  1. College of Geographical Science, Fujian Normal University/Ministry of Education Key Laboratory of Humid Sub-tropical Ecology-Geographic Process, Fuzhou 350007, China
  • Received:2019-10-14 Online:2020-01-15 Published:2020-01-15
  • Contact: E-mail: xzha@fjnu.edu.cn
  • Supported by:
    This work was supported by the National Key R&D Program of China (2017YFC0505400) and the National Key Technology Support Program of China (2014BAD15B02).

摘要: 以南方红壤严重侵蚀退化地低效林改造、乔灌草混交、浅沟播草、封禁治理4种治理模式马尾松林地为对象,研究不同治理模式和不同土层土壤有机碳(SOC)、全氮(TN)、全磷(TP)和枯落物养分含量及其化学计量特征,为该区水土流失治理和植被恢复提供科学依据。结果表明: 不同治理模式下土壤SOC、TN、TP和枯落物P含量差异显著,土壤和枯落物养分含量均显著高于对照,改善效果均以乔灌草混交最好。土壤SOC、TN和TP含量总体上随土层增加而减少;而浅沟播草治理模式表现为,土壤SOC、TN、TP含量均随着土层增加呈先减小后增大的趋势,养分含量在5~20 cm土层达到最低值;不同治理模式下土壤C:N、C:P、N:P和枯落物C:P均存在显著差异,土壤空间变异性表现为土壤C:N>C:P>N:P。土壤C:N除乔灌草混交外,其他治理模式处于较低水平,而土壤C:P和N:P整体上较高。枯落物C:N、C:P和N:P与土壤呈相反的变化规律,低效林改造和乔灌草混交远小于对照。土壤C:N和C:P主要受控于土壤SOC含量和枯落物C含量,土壤N:P主要受控于土壤TP含量和枯落物P含量。土壤化学计量比还受土壤含水量、土壤容重、pH等因素的影响,枯落物与土壤养分之间关系密切并表现出相似的变化规律。

Abstract: We investigated the concentrations of carbon (C), nitrogen (N), and phosphorus (P) and C:N:P stoichiometry in soil and litter of Pinus massoniana forest under four different management patterns: inefficient forest transformation, mixture of arbor with shrub and herb, shallow ditch grass planting, and being banned in serious erosion and degradation of red soil in southern China. Our findings could provide scientific basis for soil erosion control and vegetation restoration in this area. The results showed that there were significant differences in soil organic carbon (SOC), TN, TP and litter nutrient content among different management patterns. The nutrient contents in soil and litter under all the four management patterns were significantly higher than that of control, with mixture of arbor with shrub and herb having the highest concentrations. The concentrations of SOC, TN and TP decreased with the increases of soil layer. However, the shallow ditch grass planting mana-gement pattern presented as follows: the concentrations of SOC, TN and TP decreased first and then increased with the increases of soil layer, with the lowest value in 5-20 cm soil layer. There were significant differences in soil C:N, C:P, N:P and litter C:P among different management patterns, and the soil spatial variation was C:N>C:P>N:P. Excepted for mixture of arbor with shrub and herb, C:N was still at a lower level in the other management patterns, and soil C:P and N:P showed higher values overall. Litter C:N, C:P and N:P had opposite change pattern, with inefficient forest transformation and mixture of arbor with shrub and herb being much smaller than the control. Soil C:N and C:P were mainly controlled by SOC content and litter C content, and soil N:P was mainly controlled by soil TP content and litter P content. Soil stoichiometry was affected by soil water content, soil bulk density, pH, and other factors. The relationship between litter and soil nutrients was closely related and showed similar changes.