loading page

Effects of nitrogen and phosphorus addition on litter decomposition and soil enzyme activities with Salix cupularis in an alpine desert ecosystem
  • +3
  • Yu-Fu Hu,
  • Gang Chen,
  • Nairui Yang,
  • Hongyu Qian,
  • Wei Wang,
  • Jian-kai Lu
Yu-Fu Hu
Sichuan Agricultural University - Chengdu Campus

Corresponding Author:[email protected]

Author Profile
Gang Chen
Sichuan Agricultural University - Chengdu Campus
Author Profile
Nairui Yang
Sichuan Agricultural University - Chengdu Campus
Author Profile
Hongyu Qian
Sichuan Agricultural University - Chengdu Campus
Author Profile
Wei Wang
Sichuan Agricultural University - Chengdu Campus
Author Profile
Jian-kai Lu
Sichuan Agricultural University - Chengdu Campus
Author Profile

Abstract

Nitrogen (N) and phosphorus (P) are important factors controlling biogeochemical cycling in terrestrial ecosystems and significantly affect the decomposition process of litter. However, N and P addition effects on litter decomposition, especially biological pathways in alpine grassland in northwest Sichuan, remain unclear. Therefore, this study explored the response mechanism of Salix cupularis litter decomposition and soil enzyme activity to different exogenous nitrogen and phosphorus additions and the inner relationship, combined with field in situ experiments and laboratory analysis methods. The results showed that: (1) In general, N, P and NP treatments significantly promoted the decomposition of litter, lignin and cellulose, and the addition of NP had a stronger effect in the same concentration level. P addition could alleviate the inhibitory effect of litter decomposition by high N concentration. (2) Litter C, N and P basically showed a sustained release pattern, and NP treatment had the strongest promoting effect. (3) Each treatment significantly increased the activities of soil invertase, cellulase, polyphenol oxidase, urease and phosphatase, and the NP treatment had the best effect. The rate of litter decomposition was significantly influenced by nutrient content as well as soil enzyme activity, where cellulose content and invertase activity may be a key factor controlling the rate of litter decomposition.
15 Nov 2023Submitted to Land Degradation & Development
15 Nov 2023Assigned to Editor
15 Nov 2023Submission Checks Completed
15 Nov 2023Review(s) Completed, Editorial Evaluation Pending
17 Nov 2023Reviewer(s) Assigned