Autor: |
Peter M. VITOUSEK, Xinping CHEN, Zhenling CUI, Xuejun LIU, Pamela A. MATSON, Ivan ORTIZ-MONASTERIO, G. Philip ROBERTSON, Fusuo ZHANG |
Jazyk: |
angličtina |
Rok vydání: |
2022 |
Předmět: |
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Zdroj: |
Frontiers of Agricultural Science and Engineering, Vol 9, Iss 3, Pp 457-464 (2022) |
Druh dokumentu: |
article |
ISSN: |
2095-7505 |
DOI: |
10.15302/J-FASE-2022452 |
Popis: |
● A simple model was used to evaluate how increasing temporal variability in precipitation influences crop yields and nitrogen losses. ● Crop yields are reduced and nitrogen losses are increased at current levels of precipitation variability. ● Increasing temporal variability in precipitation, as is expected (and observed) to occur with anthropogenic climate change will reduce yields and increase nitrogen losses further. A simple ‘toy’ model of productivity and nitrogen and phosphorus cycling was used to evaluate how the increasing temporal variation in precipitation that is predicted (and observed) to occur as a consequence of greenhouse-gas-induced climate change will affect crop yields and losses of reactive N that can cause environmental damage and affect human health. The model predicted that as temporal variability in precipitation increased it progressively reduced yields and increased losses of reactive N by disrupting the synchrony between N supply and plant N uptake. Also, increases in the temporal variation of precipitation increased the frequency of floods and droughts. Predictions of this model indicate that climate-change-driven increases in temporal variation in precipitation in rainfed agricultural ecosystems will make it difficult to sustain cropping systems that are both high-yielding and have small environmental and human-health footprints. |
Databáze: |
Directory of Open Access Journals |
Externí odkaz: |
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