Effects of abandonment management on soil C and N pools in Moso bamboo forests

Xu Deng; Jiayang Yin; Lin Xu; Yongjun Shi; Guomo Zhou; Yongfu Li; Guangsheng Chen; Yuzhu Ye; Fagen Zhang; Yufeng Zhou; Yulu Xiong

doi:10.1016/j.scitotenv.2020.138949

Effects of abandonment management on soil C and N pools in Moso bamboo forests

Sci Total Environ. 2020 Aug 10:729:138949. doi: 10.1016/j.scitotenv.2020.138949. Epub 2020 Apr 28.

Authors

Xu Deng¹, Jiayang Yin¹, Lin Xu², Yongjun Shi³, Guomo Zhou¹, Yongfu Li¹, Guangsheng Chen¹, Yuzhu Ye⁴, Fagen Zhang⁵, Yufeng Zhou¹, Yulu Xiong¹

Affiliations

¹ State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an 311300, Zhejiang, China; Zhejiang Provincial Collaborative Innovation Center for Bamboo Resources and High-efficiency Utilization, Zhejiang A&F University, Lin'an 311300, Zhejiang, China; Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration of Zhejiang Province, Zhejiang A&F University, Lin'an 311300, Zhejiang, China; School of Environmental and Resources Science, Zhejiang A&F University, Lin'an 311300, Zhejiang, China.
² State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an 311300, Zhejiang, China; Zhejiang Provincial Collaborative Innovation Center for Bamboo Resources and High-efficiency Utilization, Zhejiang A&F University, Lin'an 311300, Zhejiang, China; Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration of Zhejiang Province, Zhejiang A&F University, Lin'an 311300, Zhejiang, China; School of Environmental and Resources Science, Zhejiang A&F University, Lin'an 311300, Zhejiang, China. Electronic address: xul1210@163.com.
³ State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an 311300, Zhejiang, China; Zhejiang Provincial Collaborative Innovation Center for Bamboo Resources and High-efficiency Utilization, Zhejiang A&F University, Lin'an 311300, Zhejiang, China; Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration of Zhejiang Province, Zhejiang A&F University, Lin'an 311300, Zhejiang, China; School of Environmental and Resources Science, Zhejiang A&F University, Lin'an 311300, Zhejiang, China. Electronic address: syjwwh@163.com.
⁴ Forestry Bureau of Jingning County, Jingning 323500, Zhejiang, China.
⁵ Forestry Bureau of Suichang County, Suichang 323300, Zhejiang, China.

PMID: 32387772
DOI: 10.1016/j.scitotenv.2020.138949

Abstract

Moso bamboo (Phyllostachys Pubescens) forests exhibit a great potential to sequestrate carbon dioxide from atmosphere and to mitigate global climate change. However, they were increasingly under abandoned (i.e., no fertilization, the low intensity and frequency of felling and bamboo shoot digging) due to decreasing economic values of bamboo-related products and increasing labor cost. So far, the changes in soil carbon (C) and nitrogen (N) pools in bamboo forests following abandonment are poorly addressed. In this study, Moso bamboo stands under intensively management and abandonment for different durations were sampled to explore the C and N pool dynamics at the top 40 cm soil. We classified abandonment durations into three categories: discarded or abandoned management for 1-6 years (DM-I), 7-12 years (DM-II) and 13-18 years (DM-III). Our results indicated that (1) soil organic carbon (SOC) storage was significantly increased with abandonment management compared with intensive management (Control, CK), but the durations of abandonment management had no significant effects on SOC. Microbial biomass carbon (MBC) concentration increased from DM-I to DM-III in the 0-40 cm soil layer (P < 0.01), and water-soluble organic carbon (WSOC) concentration decreased through DM-I (P < 0.01). (2) Abandonment management did not significantly affect soil total nitrogen (TN) storage at depth of 0-40 cm, with 9.54 Mg ha^-1 for CK, 9.59 Mg ha^-1 for DM-I, 9.89 Mg ha^-1 for DM-II and 9.69 Mg ha^-1 for DM-III. Water-soluble organic nitrogen (WSON) concentration significantly decreased from CK to DM-III. Ammonium nitrogen (NH₄⁺-N) concentration increased from DM-I to DM-III (P < 0.01), and nitrate nitrogen (NO₃^--N) concentration decreased from CK to DM-III (P < 0.01). The results of the effects of abandonment durations on soil properties in Moso bamboo forests provide valuable information for forest restoration and management.

Keywords: Abandonment management; Carbon pools; Moso bamboo; Nitrogen pools.

MeSH terms

Biomass
China
Forests*
Nitrogen
Poaceae
Soil*

Substances

Soil
Nitrogen