间伐对杉木人工林土壤碳氮及其组分特征的影响

王有良; 宋重升; 彭丽鸿; 崔朝伟; 郑鸣鸣; 林开敏; 任正标; 谢汝根; 胡永颜

doi:10.13870/j.cnki.stbcxb.2021.05.028

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间伐对杉木人工林土壤碳氮及其组分特征的影响

更新时间：2025-03-12

- 间伐对杉木人工林土壤碳氮及其组分特征的影响
- Effects of Thinning on Soil Carbon and Nitrogen Fractions in a
- 水土保持学报 2021年35卷第5期页码：204-212
- 作者机构：
  
  1. 福建农林大学林学院,福州,350002
  2. 国家林业和草原局杉木工程技术研究中心,福州,350002
  3. 福建省沙县官庄国有林场,福建,三明,365000
- 作者简介：
  
  [ "王有良(1994-),硕士研究生,主要从事森林培育理论与技术研究。E-mail:wangyouliang423@126.com" ]
- 基金信息：
  
  国家重点研发计划项目（2016YFD0600301）福建农林大学科技创新专项（ZX2017109，CXZX201657）
- DOI：10.13870/j.cnki.stbcxb.2021.05.028
  中图分类号： S714.3
- 纸质出版：2021
- 稿件说明：
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王有良, 宋重升, 彭丽鸿, 等. 间伐对杉木人工林土壤碳氮及其组分特征的影响[J]. 水土保持学报, 2021,35(5):204-212.

WANG Youliang, SONG Chongsheng, PENG Lihong, et al. Effects of Thinning on Soil Carbon and Nitrogen Fractions in a[J]. 2021, 35(5): 204-212.
王有良, 宋重升, 彭丽鸿, 等. 间伐对杉木人工林土壤碳氮及其组分特征的影响[J]. 水土保持学报, 2021,35(5):204-212. DOI： 10.13870/j.cnki.stbcxb.2021.05.028.

WANG Youliang, SONG Chongsheng, PENG Lihong, et al. Effects of Thinning on Soil Carbon and Nitrogen Fractions in a[J]. 2021, 35(5): 204-212. DOI： 10.13870/j.cnki.stbcxb.2021.05.028.

摘要

为探究不同间伐强度对杉木人工林土壤碳氮及其组分特征的影响，以福建省三明市官庄国有林场11年生杉木（Cunninghamia lanceolata）人工林为研究对象，采用弱度间伐（LIT）、中度间伐（MIT）、强度间伐（HIT）等3种间伐强度，研究不同间伐强度林分0—10，10—20，20—40，40—60，60—80，80—100 cm土层总有机碳（SOC）、全氮（TN）及易氧化有机碳（ROC）、硝态氮（NO3--N）、铵态氮（NH4+-N）、微生物量碳（MBC）、微生物量氮（MBN）、微生物熵碳（qMBC）、微生物熵氮（qMBN）的变化特征，以探讨不同间伐强度对杉木人工林土壤碳氮及其组分特征的影响。结果表明：间伐降低了土壤SOC和TN的含量，降低幅度分别为1.4%~36.9%，3.1%~45.7%。间伐增加了土壤MBC、NO3--N的含量，而对ROC、NH4+-N和MBN的程度在不同土层有差异，qMBC和qMBN随着间伐强度的增加而增大。相关性分析表明，土壤SOC分别与TN、qMBC、ROC、NH4+-N、MBC、MBN呈极显著正相关（P<0.01）；TN与qMBN、ROC、NH4+-N、MBC、MBN呈极显著正相关（P<0.01）。杉木人工林间伐处理降低了土壤表层SOC和TN含量，增加了土壤SMBC和qMBC、qMBN，同时也增加了土壤表层（0—10 cm） SMBN。抚育间伐导致土壤SOC和TN含量降低主要是由于活性碳、氮含量的增加，提高土壤中有机质分解速率，最终导致土壤SOC和TN含量降低。

Abstract

In order to explore the effects of different thinning intensities on soil carbon and nitrogen fractions in Chinese fir plantation

this study was conducted in 11-year-old fir plantations in Guanzhuang state-owned forest in Sanming City

Fujian Province. Three types of thinning

including light intensive thinning (LIT)

moderate interval thinning (MIT)

and hight intensive thinning (HIT) were adopted. The variations of total organic carbon (SOC)

total nitrogen (TN)

readily oxidized organic carbon (ROC)

nitrate nitrogen (NO3-N)

ammonium nitrogen (NH4+-N)

microbial biomass carbon (MBC)

microbial biomass nitrogen (MBN)

microbial entropy carbon (qMBC) and microbial entropy nitrogen (qMBN) in the 0-10

10-20

20-40

40-60

60-80

80-100 cm soil layers of different thinning intensities were explored. The results showed that thinning reduced soil SOC and TN contents by 1.4%~36.9% and 3.1%~45.7%

respectively. Thinning increased soil MBC and NO3-N content

while the change degrees on ROC

NH4+-N and MBN showed differences in different soil layers. With the increase of thinning intensity

the values of qMBC and qMBN gradually increased. Correlation analysis showed that soil SOC was significantly positively correlated with TN

qMBC

ROC

NH4+-N

MBC and MBN

respectively (P<0.01). TN was significantly positively correlated with qMBN

ROC

NH4+-N MBC and MBN (P<0.01). The thinning treatment of Cunninghamia lanceolate plantation decreased SOC and TN content in soil surface layer

increased SMBC content and qMBC

qMBN value in soil

and increased SMBN content in soil surface layer (0-10 cm). The results indicate that the decrease of soil SOC and TN content caused by thinning is mainly due to the increase of active carbon and nitrogen content

which improves the decomposition rate of organic matter in soil

and finally leads to the decrease of soil SOC and TN content.

关键词

Keywords

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