Effect of N stabilizers on fertilizer-N fate in the soil-crop system: A metaanalysis

A - Papers appearing in refereed journals

Sha, Z., Ma, X., Wang, J., Lv, T., Li, Q., Misselbrook, T. H. and Liu, X. 2020. Effect of N stabilizers on fertilizer-N fate in the soil-crop system: A metaanalysis. Agriculture, Ecosystems & Environment. 290, p. 106763. https://doi.org/10.1016/j.agee.2019.106763

AuthorsSha, Z., Ma, X., Wang, J., Lv, T., Li, Q., Misselbrook, T. H. and Liu, X.

Nitrogen (N) fertilizer stabilizers (including urease inhibitors (UI), nitrification inhibitors (NI) and double inhibitors (DI)) are promising tools to mitigate N pollution from agricultural production. For a better understanding of how N stabilizers impact on the fate of fertilizer-N, we conducted a comprehensive meta-analysis of data from experiments that used the 15N as a tracer to investigate the effects of N stabilizers on fertilizer-N recovery in the soil-crop system. We combined this with boosted regression tree (BRT) model analysis to further interpret the contribution of soil properties and experimental conditions. The dataset consisted of 72 papers (227 observations). Our results suggest that UI, NI and DI significantly enhanced the fertilizer-N uptake by the crop by 24.1, 10.5 and 47.6 %, respectively, the fertilizer-N retention in the soil by 5.8 % (UI) and 15.0 % (NI), and the fertilizer-N recovery in soil-crop system by 16.4, 10.2 and 27.5 %, respectively. On the contrary, the fertilizer-N loss is reduced by 32.9, 14.5 and 37.6 % for UI, NI and DI, respectively. Soil pH, organic matter content, inhibitor compound and nitrogen application rate were the most important explanatory variables for the impact of UI and NI amendments on fertilizer-N recovery. These findings have major implications for N stabilizer application strategies in agricultural systems, where an important consideration is the mitigation of potentially detrimental environmental consequences.

KeywordsN stabilizers; Urease inhibitor; Nitrification inhibitor; 15N tracer; Fertilizer-N recovery
Year of Publication2020
JournalAgriculture, Ecosystems & Environment
Journal citation290, p. 106763
Digital Object Identifier (DOI)https://doi.org/10.1016/j.agee.2019.106763
Open accessPublished as non-open access
FunderBBSRC Newton funding
Funder project or codeUK - China Virtual Joint Centre for Improved Nitrogen Agronomy (CINAG)
Output statusPublished
Publication dates
Online28 Nov 2019
Publication process dates
Accepted19 Nov 2019
PublisherElsevier Science Bv

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