Pinus sylvestris var. mongolica,plantation,stand density,soil property,soil layer,Zhanggutai region ,"/> 樟子松固沙林土壤理化特性对林分密度的响应

干旱区研究 ›› 2020, Vol. 37 ›› Issue (1): 134-141.

• 水土资源 • 上一篇    下一篇

樟子松固沙林土壤理化特性对林分密度的响应

于东伟1,雷泽勇1,赵国军2,张岩松3,4,于德良1,白津宁1,李尧1   

  1. 1. 辽宁工程技术大学环境科学与工程学院,辽宁 阜新 123000; 2. 辽宁省沙地治理与改良利用研究所,辽宁 阜新 123000; 3. 中国科学院沈阳应用生态研究所大青沟沙地实验站,辽宁 沈阳 110016; 4. 中国科学院大学,北京 100049
  • 收稿日期:2019-03-08 修回日期:2019-08-19 出版日期:2020-01-15 发布日期:2020-01-15
  • 通讯作者: 雷泽勇
  • 作者简介:于东伟(1994-),女,硕士,研究方向为生态修复理论与技术研究.E-mail:1760388605@qq.com
  • 基金资助:
    国家自然科学基金项目(31570709)资助

Response of Soil Physiochemical Properties under Sand-Fixation Forest of Pinus sylvestris var. mongolica to Stand Density

YU Dong-wei1, LEI Ze-yong1, ZHAO Guo-jun2, ZHANG Yan-song3, 4, YU De-liang1, BAI Jin-ning1, LI Yao1   

  1. 1. College of Environmental Science and Engineering, Liaoning Technical University,Fuxin 123000,Liaoning, China;
    2. Liaoning Institute of Sandy Land Management, improvement and Utilization, Fuxin 123000,Liaoning, China;
    3. Daqinggou Ecological Station, Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016,Liaoning,China;
    4. University of Chinese Academy of Sciences,Beijing 100049,China

  • Received:2019-03-08 Revised:2019-08-19 Online:2020-01-15 Published:2020-01-15

摘要:

为了研究樟子松人工固沙林林分密度对土壤理化特性的影响,在章古台地区选取林分密度分别为625(P1)、775(P2)、1 025(P3)、1 175(P4)株·hm-2和1 250(P5)株·hm-2的樟子松中龄林(林龄为23~27 a)为研究对象,对0~100 cm深度的樟子松林地土壤按0~10、10~20、20~40、40~60、60~80、80~100 cm进行分层,分析其理化特性。结果表明:0~10 cm土层全氮和20~40 cm土层土壤容重随密度增加呈上升趋势,P5显著高于P1P < 0.05);0~80 cm土层全钾和0~60 cm土层pH随密度增加先升高后降低,P3最高,且P3样地全钾在10~60 cm土层显著高于P1P < 0.05);pH在0~40 cm土层显著高于其他样地(P < 0.05);0~10 cm土层全磷随密度增加而减小,P1显著高于P3~P5P < 0.05);P4或P5样地有效钾在0~40 cm土层显著高于P1、P2样地(P < 0.05),在40~100 cm土层显著高于P3样地(P < 0.05);P2~P4样地的土壤孔隙度在40~100 cm土层低于P1和P5样地。综合考虑林分密度对樟子松中龄林土壤理化特性的影响,章古台地区樟子松林的合理林分密度为1 025~1 175株·hm-2,可采取间伐等营林管理措施调节林分密度,确保樟子松固沙林生长具有良好的土壤条件。

关键词: 樟子松, 固沙林, 林分密度, 土壤性质, 土壤层次, 章古台地区

Abstract:

In this study, the 23-27-year aged forests with stand densities of 625 (P1), 775 (P2), 1 025 (P3), 1 175 (P4) and 1 250 (P5) plants/ha in the Zhanggutai region were selected. The purpose of the study was to analyze the effect of stand density on soil physiochemical properties at 0-100 cm depth. The results showed that the total nitrogen content in 0-10-cm soil layer and the bulk density in 20-40-cm soil layer increased with the increase of stand density, and the total nitrogen content and bulk density in plot P5 were significantly higher than those in plot P1 (P<0.05). The total potassium content in 0-80-cm soil layer and the pH value in 0-60-cm soil layer increased at first and then decreased with the increase of stand density, and they were the highest in plot P3. The total potassium content in 10-60-cm soil layer in plot P3 was significantly higher than that in plot P1 (P<0.05), and the pH value in 0-40-cm soil layer was significantly higher than that in other plots (P<0.05). The total phosphorus content in 0-10-cm soil layer decreased with the increase of stand density, and it in plot P1 was significantly higher than that in plots P3-P5 (P<0.05). The available potassium content in 0-40-cm soil layer in plot P4 or P5 was significantly higher than that in plots P1 and P2 (P<0.05), and also significantly higher than that in 40-100-cm soil layer in plot P3 (P<0.05). The porosity in 40-100-cm soil layer in plots P2-P4 was lower than that in plots P1 and P5. Considering the influence of stand density on soil physiochemical properties of middle-aged P. sylvestris var. mongolica plantation, the rational stand density of P. sylvestris var. mongolica plantation in the study area should be 1 025-1 175 plants·hm-2. Intermediate cuttings and other forest management measures could be taken to regulate the stand density so as to ensure the good soil conditions for the growth of sand-fixing forests of P. sylvestris var. mongolica.

Key words:  Pinus sylvestris var. mongolica')">

 Pinus sylvestris var. mongolica, plantation, stand density, soil property, soil layer, Zhanggutai region