Impact of Climate Change Adaptation Strategies on Winter Wheat and Cropping System Performance across Precipitation Gradients in the Inland Pacific Northwest, USA
Autor: | William F. Schillinger, Aaron D. Esser, William L. Pan, Ayana Glover, Erin S. Brooks, Jodi L. Johnson-Maynard, Frank L. Young, Tai McClellan Maaz, Ian N. Leslie, Stephen Machado, Harold P. Collins, Lauren E. Young, Isaac J. Madsen |
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Rok vydání: | 2017 |
Předmět: |
0106 biological sciences
diversification fallow Climate change precipitation engineering.material 01 natural sciences Summer fallow Cropping system intensification Agroecology lcsh:Environmental sciences General Environmental Science lcsh:GE1-350 Agroforestry cropping systems 04 agricultural and veterinary sciences iPNW USA Tillage Agronomy Environmental Science 040103 agronomy & agriculture engineering conservation tillage 0401 agriculture forestry and fisheries Environmental science Fertilizer Monoculture Cropping 010606 plant biology & botany |
Zdroj: | Frontiers in Environmental Science, Vol 5 (2017) |
ISSN: | 2296-665X |
DOI: | 10.3389/fenvs.2017.00023 |
Popis: | Ecological instability and low resource use efficiencies are concerns for the long-term productivity of conventional cereal monoculture systems, particularly those threatened by projected climate change. Crop intensification, diversification, reduced tillage, and variable N management are among strategies proposed to mitigate and adapt to climate shifts in the inland Pacific Northwest (iPNW). Our objectives were to assess these strategies across iPNW agroecological zones and time for their impacts on (1) winter wheat (WW) (Triticum aestivum L.) productivity, (2) crop sequence productivity, and (3) N fertilizer use efficiency. Region-wide analysis indicated that WW yields increased with increasing annual precipitation, prior to maximizing at 520 mm yr−1 and subsequently declining when annual precipitation was not adjusted for available soil water holding capacity. While fallow periods were effective at mitigating low nitrogen (N) fertilization efficiencies under low precipitation, efficiencies declined as annual precipitation exceeded 500 mm yr−1. Variability in the response of WW yields to annual precipitation and N fertilization among locations and within sites supports precision N management implementation across the region. In years receiving |
Databáze: | OpenAIRE |
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