Assessment of nitrogen uptake and biological nitrogen fixation responses of soybean to nitrogen fertiliser with SPACSYS

A - Papers appearing in refereed journals

Wu, L., Misselbrook, T. H., L. Feng and Wu, L. 2020. Assessment of nitrogen uptake and biological nitrogen fixation responses of soybean to nitrogen fertiliser with SPACSYS. Sustainability. 12 (15), p. 5921. https://doi.org/10.3390/su12155921

AuthorsWu, L., Misselbrook, T. H., L. Feng and Wu, L.
Abstract

Chemical fertiliser nitrogen addition will inhibit biological nitrogen fixation (BNF) for soybean (Glycine max [L.] Merr) growth. The optimal balance of these two nitrogen input sources has been a key issue for sustainable development in Northeast China. We used the data collected from a four-year experiment with varied irrigation and fertiliser treatments from 2007 to 2010 to evaluate the SPACSYS model. The validated model was run to investigate the responses to different management practices in seed yield, BNF, nitrogen content in seed and soil nitrogen budgets. Scenario testing showed average yield increase of 2.4% - 5.2% with additional 50-100 kg N/ha application. Irrigation at the reproductive stage improved seed yield in drier years with an increase of 12-33% compared with the rain-fed treatment. BNF was suppressed by fertiliser nitrogen application and drought stress with a decrease of 6-33% and 8-34%, respectively. The average nitrogen budget without fertilization indicated a deficit of 39 kg N/ha. To attain higher seed yield, applying fertiliser at 25-30 and 15-20 kg N/ha before sowing is advised in drier and wetter years, respectively. To achieve a higher seed nitrogen content, an application rate of 55-60 and 45-50 kg N/ha is recommended for drier and wetter years, respectively.

KeywordsSoybean; Northeast China; Yield; Biological nitrogen fixation; N budget; Seed N
Year of Publication2020
JournalSustainability
Journal citation12 (15), p. 5921
Digital Object Identifier (DOI)https://doi.org/10.3390/su12155921
Open accessPublished as ‘gold’ (paid) open access
FunderBBSRC Newton funding
Funder project or codeUK - China Virtual Joint Centre for Improved Nitrogen Agronomy (CINAG)
Publisher's version
Output statusPublished
Publication dates
Online23 Jul 2020
Publication process dates
Accepted20 Jul 2020
PublisherMDPI
ISSN2071-1050

Permalink - https://repository.rothamsted.ac.uk/item/97153/assessment-of-nitrogen-uptake-and-biological-nitrogen-fixation-responses-of-soybean-to-nitrogen-fertiliser-with-spacsys

40 total views
14 total downloads
6 views this month
2 downloads this month
Download files as zip