Response of Soil Carbon, Nitrogen and Glomalin to Inoculation of Arbuscular Mycorrhizal Fungi in Erosion-Degraded Forestland, Red Soil Region of China

CHEN Xiaoguang; LIU Wenxiang; YU Hanqing

doi:10.13870/j.cnki.stbcxb.2021.05.047

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Response of Soil Carbon, Nitrogen and Glomalin to Inoculation of Arbuscular Mycorrhizal Fungi in Erosion-Degraded Forestland, Red Soil Region of China

更新时间：2025-03-12

- Response of Soil Carbon, Nitrogen and Glomalin to Inoculation of Arbuscular Mycorrhizal Fungi in Erosion-Degraded Forestland, Red Soil Region of China
- Vol. 35, Issue 5, Pages: 354-361(2021)
- 作者机构：
  
  1. 中国农业科学院农业环境与可持续发展研究所,北京,100081
  2. 广西大学农学院,南宁,530004
  3. 长江水利委员会长江科学院重庆分院,重庆,400026
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2021.05.047
  CLC： S157.1
- Published：2021
- 稿件说明：
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CHEN Xiaoguang, LIU Wenxiang, YU Hanqing. Response of Soil Carbon, Nitrogen and Glomalin to Inoculation of Arbuscular Mycorrhizal Fungi in Erosion-Degraded Forestland, Red Soil Region of China[J]. 2021, 35(5): 354-361.
DOI：

CHEN Xiaoguang, LIU Wenxiang, YU Hanqing. Response of Soil Carbon, Nitrogen and Glomalin to Inoculation of Arbuscular Mycorrhizal Fungi in Erosion-Degraded Forestland, Red Soil Region of China[J]. 2021, 35(5): 354-361. DOI： 10.13870/j.cnki.stbcxb.2021.05.047.

摘要

南方红壤区林下侵蚀劣地近地表植被覆盖度低，导致林下水土流失严重。接种AM真菌能够促进植被生长，改善土壤肥力，进而可以减少土壤侵蚀。以马尾松退化林地为对象，设置引种灌木（S）和引种灌木并接菌（S+AMF）2个处理，研究AM真菌接种对林下侵蚀劣地土壤碳氮及球囊霉素的影响。结果表明：接菌近1年后，菌根侵染率（MCR）在S+AMF处理的坡上部和全坡位上显著>S处理（P<0.05）；SOC、TN、SMBC、EE-GRSP和T-GRSP含量在S+AMF处理的坡下部均显著>坡中部（P<0.05），而在S处理下各坡位差异均不显著（P>0.05）；AN、SMBN和pH在各处理不同坡位差异均不显著（P>0.05）；与未接菌S处理相比，接菌（S+AMF）处理对MCR、SOC、TN、SMBC、SMBN、EE-GRSP、T-GRSP、AN和pH的平均贡献率分别为43.83%±15.10%，5.33%±1.57%，14.69%±7.92%，27.88%±4.89%，39.25%±4.82%，6.90%±2.56%，12.47%±7.95%，-13.18%±6.63%和-0.71%±2.74%。简单相关和逐步回归分析表明，MCR、SOC、TN、SMBC、SMBN和球囊霉素之间呈显著正相关（P<0.05），TN、SMBC和MCR解释了SOC 80.5%的变异，SOC、SMBC、SMBN和MCR共同解释了TN 90.4%的变异，而TN、SMBN、pH和MCR解释了AN 48.9%的变异，说明接菌提高了紫穗槐根系的菌根侵染率，从而间接促进了林下土壤碳氮及球囊霉素的增加，为有效改善林下侵蚀劣地土壤质量和促进植被恢复有重要的意义。

Abstract

Near-surface vegetation coverage of erosion-degraded forestlands is low in the red soil region of South China

which leading to serious soil erosion. Inoculation of arbuscular mycorrhizal (AM) fungi can promote vegetation growth and improve soil structure and then can reduce soil erosion. The effects of AM fungi inoculation on soil carbon

nitrogen and glomalin were investigated in erosion-degraded Pinus massoniana forestland

and two treatments were set up

including shrub planting (S)

and shrub planting with AM fungi (S+AMF). The results showed that nearly one year after inoculation with AM fungi

mycorrhizal colonization rate (MCR) of S+AMF treatment was significantly higher than that of S treatment on the upper slope position and the whole slope (P<0.05). The contents of SOC

SMBC

EE-GRSP and T-GRSP in the lower slope were significantly higher than those in middle slope in the S+AMF treatment (P<0.05)

while there was no significant difference among slope positions in the S treatment (P>0.05). There was no significant difference in AN

SMBN and pH among different slope positions in each treatment (P>0.05). Compared with S treatment

the mean contribution rates of S+AMF treatment to MCR

SOC

SMBC

SMBN

EE-GRSP

T-GRSP

AN and pH were 43.83%±15.10%

5.33%±1.57%

14.69%±7.92%

27.88%±4.89%

39.25%±4.82%

6.90%±2.56%

12.47%±7.95%

-13.18%±6.63%

-0.71%±2.74%

respectively. The Pearson correlation and stepwise regression analysis suggested that there was a significant positive correlation between MCR

SOC

SMBC

SMBN and glomalin (P<0.05). TN

SMBC and MCR explained 80.5% variation of SOC and SOC

SMBC

SMBN and MCR explained 90.4% variation of TN

while TN

SMBN

pH and MCR explained 48.9% variation of AN

indicating that inoculation with AM fungi increased mycorrhizal colonization rate of Amorpha fruticosa Linn root system

which indirectly promoted the increase of soil carbon

nitrogen and glomalin. This study was of great significance for effectively improving the soil quality and promoting vegetation restoration in erosion-degraded forestlands.

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