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[1]吴丽君 李卫忠 薛巍 杨玉莲 林浩 吴庆贵**.桤-柏带状改造对川中丘陵区柏木林土壤C:N:P化学计量特征的影响[J].应用与环境生物学报,2020,26(05):1-11.[doi:10.19675/j.cnki.1006-687x.2019.12002]
 WU Lijun,LI Weizhong,XUE Wei,et al.[J].Chinese Journal of Applied & Environmental Biology,2020,26(05):1-11.[doi:10.19675/j.cnki.1006-687x.2019.12002]
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桤-柏带状改造对川中丘陵区柏木林土壤C:N:P化学计量特征的影响()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
26卷
期数:
2020年05期
页码:
1-11
栏目:
研究论文
出版日期:
2020-10-25

文章信息/Info

作者:
吴丽君1 李卫忠2 薛巍2 杨玉莲1 林浩1 吴庆贵12**
1绵阳师范学院生态安全与保护四川省重点实验室 绵阳 621000
2西北农林科技大学林学院 杨凌 712100
Author(s):
WU Lijun1 LI Weizhong2 XUE Wei2 YANG Yulian1 LIN Hao1 & WU Qinggui 1 2**
1 Ecological Security and Protection Key Laboratory of Sichuan Province, Mianyang Normal University , Mianyang 621000, China
2 College of Forestry, Northwest A & F University , Yangling 712100, China
关键词:
柏木低效林改造化学计量比持水能力川中丘陵区
Keywords:
Cupressus funebris Reconstruction of low-benefit stands C:N:P stoichiometry Water-holding capacity the central Sichuan hilly region
DOI:
10.19675/j.cnki.1006-687x.2019.12002
摘要:
川中丘陵区高密度柏木防护林存在林分结构单一、土壤地力退化、生物多样性低等问题。为揭示桤木-柏木带状改造对土壤碳、氮、磷分配格局和土壤物理性质的影响,采用典型样地法分析了桤木-柏木带状混交林和柏木纯林0-20 cm(M1)和20-40 cm(M2)土壤物理性质、有机碳(OC)、全氮(TN)和全磷(TP)含量及化学计量比。结果表明:经桤木-柏木带状改造后,M1和M2土层OC分别增加46.80%和77.01%,TP分别降低67.98%和60.20%,TN无显著变化,土壤C:N、C:P和N:P比值以及土壤总孔隙度、毛管孔隙度、土壤自然含水量和最大持水量均显著增加;随着土层加深,桤-柏混交林的土壤OC、TN、C:P、N:P和最大持水量显著降低,C:N和容重显著升高,TP无显著性变化,柏木纯林的土壤OC、TN和TP显著降低,C:N:P化学计量比、容重、总孔隙度、毛管孔隙度、非毛管孔隙度、自然含水量和最大持水量无显著变化;同时,桤-柏带状改造还减弱了土壤容重、孔隙度和最大持水量对碳氮磷含量和化学计量比的影响,加剧了表层土壤磷的限制。因此,桤-柏带状改造能够有效改善柏木纯林土壤的理化性质,增强柏木林土壤涵养水源的功能;在后期的经营过程中,建议在桤木-柏木混交林中补施磷肥以缓解土壤磷元素缺乏现象。
Abstract:
The high-density CuPressus funebris protection forest in the central Sichuan hilly region is characterized by single forest structure, degraded soil fertility and lower biodiversity. In order to reveal the effects of strip reform on soil physical properties and the distribution patterns of soil carbon (C), nitrogen (N) and phosphorus (P), typical sampling method was used to analyze the soil physical properties, organic carbon (OC), total nitrogen (TN), total phosphorus (TP) and C:N:P ecological stoichiometry of 0 - 20 cm (M1) and 20 - 40 cm (M2) in the forest of pure Cupressus funebris and mixed plantation with Alnus cremastogyne and Cupressus funebris by strip reform. The results showed that the strip reform increased OC by 46.80% for M1 and 77.01% for M2; and decreased TP by 67.98% for M1 and 60.20% M2. There was no significant difference in TN for both M1 and M2 after strip reform, while the soil C: N, C: P, N: P, total porosity, capillary porosity, natural water content and maximum water-holding capacity in both M1 and M2 were increased after the treatment of strip reform. With the deepening soil layer, in the plantation of strip reform, soil OC, TN, C:P, N:P and maximum water-holding capacity decreased significantly, C: N and bulk density increased significantly, while the TP showed no significant change. In contrast, the soil OC, TN and TP significantly decreased with the deepening soil layer, while there was no significant changes in C:N:P, bulk density, total porosity, capillary porosity, non-capillary porosity, natural water content and maximum water capacity in the pure Cupressus funebris forest . In addition, after strip reform, the effects of soil bulk density, porosity and maximum water-holding capacity on the content of carbon, nitrogen and phosphorus and the stoichiometric ratio also became weakened, and intensified the restriction of phosphorus in the topsoil. Therefore, it is better to apply phosphate fertilizer in the mixed plantation after strip reform to alleviate the lack of element P in situ.

参考文献/References:

Effects of Alnus cremastogyne-Cupressus funebris Strip Reform on soil C: N: P Stoichiometry of Cupressus funebris forests in hilly area of central Sichuan Basin

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备注/Memo

备注/Memo:
收稿日期 Received: 2019-12-02 接受日期 Accepted: 2020-01-20
*四川省科技厅项目(2018JY0244)、四川省教育厅创新团队项目(13TD0015)、四川省教育厅项目(16ZA0322, 15ZB0282)、四川省大学生创新创业训练计划项目(201810639055)资助
**通讯作者 Corresponding author (E-mail: qgwu30@163.com)
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更新日期/Last Update: 2020-01-21