马尾松林阔叶化改造对土壤C、N、P含量及其生态化学计量特征的影响

doi:10.13292/j.1000-4890.202510.021

生态学杂志 ›› 2025, Vol. 44 ›› Issue (10): 3389-3395.doi: 10.13292/j.1000-4890.202510.021

马尾松林阔叶化改造对土壤C、N、P含量及其生态化学计量特征的影响

薛沛沛¹，齐代华²，陈本文¹，师贺雄^1*，孟祥江¹，马正锐¹

(¹重庆市林业科学研究院，重庆武陵山森林生态站，重庆 400036； ²西南大学生命科学学院，重庆 400715)

出版日期:2025-10-10 发布日期:2025-10-13

The effects of broadleaved transformation of Pinus massoniana forests on the contents and ecological stoichiometry of C, N and P in soil.

XUE Peipei¹, QI Daihua², CHEN Benwen¹, SHI Hexiong^1*, MENG Xiangjiang¹, MA Zhengrui¹

(¹Wulingshan Forest Ecology Station, Chongqing Academy of Forestry, Chongqing 400036, China; ²School of Life Sciences, Southwest University, Chongqing 400715, China).

Online:2025-10-10 Published:2025-10-13

摘要/Abstract

摘要： 马尾松林阔叶化改造是目前马尾松林可持续经营的重点方向之一，但对其阔叶化改造林的土壤化学计量特征知之甚少。为了阐明马尾松林阔叶化改造过程中的土壤化学计量特征，选取40 a马尾松纯林（CK）、马尾松与10 a香樟混交林（X1）、马尾松与20 a香樟混交林（X2）和30 a香樟林（X3）为研究对象，分析了0～20、20～40、40～60 cm土层土壤有机碳（C）、全氮（N）、全磷（P）含量及其化学计量比的垂直分布特征。结果表明：（1）土壤C、N、P含量及其化学计量比均随土层深度增加而减少。（2）土壤C、N含量以及土壤C∶N随阔叶化改造时间的增加而显著增加，土壤P含量在改造过程中保持相对稳定。CK林分的土壤C∶P、N∶P显著低于其他林分（P<0.05），表现出混交林>阔叶林>针叶林的趋势。（3）林型显著影响土壤C、N、P含量及其生态化学计量比（P<0.05），土壤深度对土壤C、N含量影响显著（P<0.05），但林型与土壤深度交互作用对土壤N、P含量的影响不显著。（4）土壤C、N、P含量之间存在极显著的正相关关系，土壤C与N∶P、土壤N与C∶P、土壤P与C∶N均呈极显著正相关。总体来说，马尾松林阔叶化改造提升了土壤C、N含量，进而促进了土壤C∶N、C∶P、N∶P的增加。

关键词: 马尾松, 阔叶化改造林, 生态化学计量学, 林型, 土层

Abstract: Broadleaved transformation is one of the key directions for sustainable management of Pinus massoniana forests, but little is known about the changes of soil stoichiometric characteristics. Here, we investigated soil stoichiometric characteristics across pure Pinus massoniana forest (CK, 40-year-old), Pinus massoniana (40-year-old) and Cinnamomum camphora (10-year-old) mixed forest (X1, transformed from pure Pinus massoniana forest), Pinus massoniana (40-year-old) and Cinnamomum camphora (20-year-old) mixed forest (X2, transformed from pure Pinus massoniana forest), and 30-year-old Cinnamomum camphora forest (X3). We examined the vertical characteristics of soil organic carbon (C), total nitrogen (N), total phosphorus (P) and their stoichiometric ratios at soil depths of 0-20, 20-40, 40-60 cm. The results showed that: (1) Soil C, N, P contents and their stoichiometric ratios decreased with increasing soil depth. (2) Soil C, N contents and C∶N significantly increased with increasing transformation time, while soil P content remained relatively stable. Soil C∶P and N∶P in CK were significantly lower than those in other stands (P<0.05), showing a trend of mixed forest (X1 and X2) > broadleaved forest (X3) > coniferous forest (CK). (3) Forest type significantly affected soil C, N, P contents and their ecological stoichiometric ratios (P<0.05). Soil depth had significant effect on soil C and N contents (P<0.05). However, forest type and soil depth showed no interaction in affecting soil N and P contents. (4) There were significant positive correlations among soil C, N and P contents. Soil C and N∶P, soil N and C∶P, and soil P and C∶N showed significant positive correlations. Overall, the broadleaved transformation of Pinus massoniana forest increased soil C and N contents and the ratios of soil C∶N, C∶P, and N∶P.

Key words: Pinus massoniana, broadleaved-oriented transformed forest, ecological stoichiometry, forest type, soil layer

薛沛沛, 齐代华, 陈本文, 师贺雄, 孟祥江, 马正锐. 马尾松林阔叶化改造对土壤C、N、P含量及其生态化学计量特征的影响[J]. 生态学杂志, 2025, 44(10): 3389-3395.

XUE Peipei, QI Daihua, CHEN Benwen, SHI Hexiong, MENG Xiangjiang, MA Zhengrui. The effects of broadleaved transformation of Pinus massoniana forests on the contents and ecological stoichiometry of C, N and P in soil.[J]. Chinese Journal of Ecology, 2025, 44(10): 3389-3395.

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马尾松林阔叶化改造对土壤C、N、P含量及其生态化学计量特征的影响

The effects of broadleaved transformation of Pinus massoniana forests on the contents and ecological stoichiometry of C, N and P in soil.

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