HUBEI AGRICULTURAL SCIENCES ›› 2023, Vol. 62 ›› Issue (8): 60-68.doi: 10.14088/j.cnki.issn0439-8114.2023.08.009

• Resource & Environment • Previous Articles     Next Articles

Integrated analysis of the effect of nitrogen addition on soil organic phosphorus transformation

WANG Yan-jie, WU Lin-hui, GENG Bi-miao, ZHAO Qiong, SUN Qing-ye   

  1. College of Resources and Environmental Engineering, Anhui University, Wuhu 241000, Anhui, China
  • Received:2022-06-21 Online:2023-08-25 Published:2023-09-22

Abstract: In order to investigate the impact of nitrogen deposition on soil organic phosphorus mineralization and microbial phosphorus fixation, this study collected 86 pieces of literature on the impact of soil organic phosphorus transformation worldwide and conducted a meta-analysis of 874 sets of data obtained. Quantitative analysis was conducted on the effects of nitrogen addition on soil organic phosphorus transformation related indicators (phosphatase, microbial biomass phosphorus, etc.) and their differences in different types of ecosystems, soil pH, soil depth, nitrogen source, nitrogen addition amount, and duration. Globally, nitrogen addition significantly increased soil acid phosphatase and alkaline phosphatase activities by 10.7% and 8.8%, respectively, and significantly decreased soil microbial biomass phosphorus content by 13.2%. The addition of nitrogen promoted the enhancement of soil organic phosphorus mineralization and inhibited the fixation of phosphorus by microbial biomass. Nitrogen addition reduced soil pH by 4.1%. Soil pH was significantly negatively correlated with acid phosphatase activity, but significantly positively correlated with microbial biomass phosphorus content. Nitrogen addition significantly increased soil phosphatase activity, indicating that nitrogen addition promoted soil organic phosphorus mineralization. The addition of nitrogen significantly reduced the phosphorus content of soil microbial biomass and inhibited the fixation of phosphorus by soil microorganisms. The response of organic phosphorus mineralization and microbial fixation to nitrogen addition varied among different ecosystem types, soil pH, soil depth, and experimental operations. In addition, the change in soil pH caused by nitrogen addition was an important reason for its impact on soil organic phosphorus transformation.

Key words: nitrogen addition, organic phosphorus mineralization, microbial phosphorus fixation, soil pH, organic phosphorus transformation, integrated analysis

CLC Number: