Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 433611
Title Yield-scaled N2O emissions in a winter wheat - summer corn double-cropping system
Author(s) Qin, S.; Wang, Y.; Hu, C.; Oenema, O.; Li, X.; Zhang, Y.; Dong, W.
Source Atmospheric Environment 55 (2012). - ISSN 1352-2310 - p. 240 - 244.
Department(s) Alterra - Sustainable soil management
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) nitrous-oxide emissions - north china plain - n-deposition - soil - fertilization - tillage - season
Abstract Emissions of nitrous oxide (N2O) from agricultural soils contribute to global warming and stratospheric ozone depletion. Applications of fertilizer nitrogen (N) increase N2O emission, but also increase agricultural production. Here, we report on the responses of crop yield, N2O emission and yield-scaled N2O emission (N2O emission per unit N uptake by grain and aboveground biomass) to different N fertilizer rates in a winter wheat–summer corn double-cropping system in the North China Plain. Soil N2O emission measurements were carried out for two years in a long-term field experiment, under semi-arid conditions with four flood irrigations events per year. Our results indicated that N2O emissions were linear functions and yield-scaled N2O emissions were cubic functions of N fertilizer application rate. Yield-scaled N2O emissions were lowest at application rates of 136 kg N ha-1 yr-1. Using a quadratic-plateau model, it was found that maximal crop yields were achieved at an application rate of 317 kg N ha-1 yr-1, which is 20% less than current practice. This level is suggested to be a compromise between achieving food security and mitigation N2O emissions.
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