Responses of hydrolytic enzyme activities in saline-alkaline soil to mixed inorganic and organic nitrogen addition.

ABSTRACT: The effects of manipulating nitrogen (N) deposition, with the use of a single form of N, on soil enzyme activities have been extensively studied. However, the impacts varying the N type (organic vs. inorganic) on soil hydrolytic enzyme activities have been less studied. We performed a 60 day incubation experiment using saline-alkaline soil. The objectives were to explore how the microbial biomass and enzyme activities respond to a mixed N addition at different inorganic to organic N ratios. The experimental design was full factorial, with two rates of N addition (10 g N m-2 and 20 g N m-2) and four ratios of N addition (inorganic N:organic N = 10:0, 7:3, 3:7, 1:9). The results showed that N addition stimulated enzyme activities involved in C, N and P cycling. Enzyme activities under mixed

SUBMITTER: Shi B 

PROVIDER: S-EPMC5852051 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature