Impact of nitrogen and phosphorus additions on soil gross nitrogen transformations in a temperate desert steppe

A - Papers appearing in refereed journals

Yue, P., Zhang, J., Zhu, G., Yin, X., Zhang, X., Wang, S., Muller, C., Misselbrook, T. H. and Zuo, X. 2023. Impact of nitrogen and phosphorus additions on soil gross nitrogen transformations in a temperate desert steppe. European Journal of Soil Science. 74 (5), p. e13416. https://doi.org/10.1111/ejss.13416

AuthorsYue, P., Zhang, J., Zhu, G., Yin, X., Zhang, X., Wang, S., Muller, C., Misselbrook, T. H. and Zuo, X.
Abstract

Nutrient addition has a significant impact on plant growth and nutrient cycling. Yet, the understanding of how the addition of nitrogen (N) or phosphorus (P) significantly affects soil gross N transformations and N availability in temperate desert steppes is still limited. Therefore, a 15N tracing experiment was conducted to study these processes and their underlying mechanism in a desert steppe soil that had been supplemented with N and P for 4 years in northwestern China. Soil N mineralization was increased significantly by P addition, and N and P additions significantly promoted soil autotrophic nitrification, rather than NH4+-N immobilization. The addition of N promoted dissimilatory NO3− reduction to NH4+, while that of P inhibited it. Soil NO3−-N production was greatly increased by N added alone and by that of N and P combined, while net NH4+-N production was decreased by these treatments. Soil N mineralization was primarily mediated by pH, P content or organic carbon, while soil NH4+-N content regulated autotrophic nitrification mainly, and this process was mainly controlled by ammonia-oxidizing bacteria rather than archaea and comammox. NH4+-N immobilization was mainly affected by functional microorganisms, the abundance of narG gene and comammox Ntsp-amoA. In conclusion, gross N transformations in the temperate desert steppe largely depended on soil inorganic N, P contents and related functional microorganisms. Soil acidification plays a more key role in N mineralization than other environmental factors or functional microorganisms.

KeywordsN15 diffusion technique; Desert grassland; Functional genes; Soil gross N transformations
Year of Publication2023
JournalEuropean Journal of Soil Science
Journal citation74 (5), p. e13416
Digital Object Identifier (DOI)https://doi.org/10.1111/ejss.13416
Open accessPublished as non-open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeS2N - Soil to Nutrition [ISPG]
Output statusPublished
Publication dates
Online28 Aug 2023
Publication process dates
Accepted25 Aug 2023
PublisherWiley
ISSN1351-0754

Permalink - https://repository.rothamsted.ac.uk/item/98y5z/impact-of-nitrogen-and-phosphorus-additions-on-soil-gross-nitrogen-transformations-in-a-temperate-desert-steppe

Restricted files

Publisher's version

Under embargo indefinitely

42 total views
1 total downloads
1 views this month
0 downloads this month