Acta Agriculturae Zhejiangensis ›› 2024, Vol. 36 ›› Issue (11): 2558-2565.DOI: 10.3969/j.issn.1004-1524.20231086

• Environmental Science • Previous Articles     Next Articles

Soil organic carbon content and structural characteristics in water bamboo fields with different cultivation time

AI Ran1,2(), HE Jie3, LIN Haizhong3, WENG Liqing4, CHEN Zhaoming2, MA Junwei2, WANG Qiang2,*()   

  1. 1. College of Environment and Resources, Zhejiang A&F University, Hangzhou 311300, China
    2. Institute of Environmental Resources and Soil Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
    3. Huangyan Bureau of Agriculture and Rural Affairs, Taizhou 318020, Zhejiang, China
    4. Yuyao Bureau of Agriculture and Rural Affairs, Yuyao 315400, Zhejiang, China
  • Received:2023-09-11 Online:2024-11-25 Published:2024-11-27

Abstract:

In order to investigate the effects of water bamboo cultivation time on soil organic carbon (SOC) content and structural characteristics, soil samples were collected from 0-20 cm and >20-40 cm layer from water bamboo fields with different planting years in Huangyan District and Yuyao City in Zhejiang Province, China, (in Huangyan, the water bamboo cultivation time was 0, 5, 15, 30 a, respectively; in Yuyao, the water bamboo cultivation time was 1, 5, 15 a, respectively). The soil particulate organic carbon (POC) content was determined, and the SOC functional group abundance was detected by solid-state 13C nuclear magnetic resonance (13C NMR). The results showed that, the SOC content in 0-20 cm layer of water bamboo field increased with the prolonged cultivation time, but the cultivation time did not significantly affect the SOC content in >20-40 cm soil layer in Huangyan. Besides, compared with the filed without water bamboo cultivation, the contents of SOC and POC content in the 0-20 cm soil layer of water bamboo field cultivated for 30 a in Huangyan were significantly (P<0.05) increased by 40.3%, 86.4%, respectively, the proportion of POC in SOC in 0-20 cm soil layer was significantly increased by 12 percentage points, the proportion of alkyl-C was significantly decreased by 5.96, 9.53 percentage points in the 0-20, >20-40 cm soil layer, respectively, and the proportion of aromatic-C was significantly increased by 4.31 percentage points in the >20-40 soil layer. In Yuyao, the SOC functional group abundance in both 0-20 and >20-40 cm soil layer and the contents of SOC, POC in >20-40 cm soil layer were not significantly influenced by the cultivation time. Compared with the water bamboo field cultivated for 1 a, the contents of SOC and POC in the 0-20 cm soil layer of the water bamboo field cultivated for 5 a were significantly increased by 41.0%, 87.1%, respectively, and the proportion of POC in SOC was significantly increased by 10 percentage points. In general, water bamboo planting could increase the SOC content and POC content in 0-20 cm soil layer, yet the prolonged cultivation of water bamboo could weaken the stability of soil organic carbon.

Key words: water bamboo, cultivation time, soil organic carbon, organic carbon fraction, carbon-13 nuclear magnetic resonance (13C NMR)

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