Crop responses to elevated carbon dioxide and interaction with temperature: grain legumes
2005
Prasad, P.V.V. | Allen, L.H. Jr | Boote, K.J.
Atmospheric carbon dioxide concentration ([CO2]) and other greenhouse gases have risen over the past few decades. If this continues, it could indirectly lead to increases in global temperature. Responses of grain legume crops (soybean, dry bean, peanut and cowpea) to elevated [CO2] and interactions with temperature are summarized. Our research shows that, in the absence of biotic (pests, diseases and weeds) or abiotic (temperature, water and nutrients) stresses, elevated [CO2] will increase yield due to increased photosynthesis and growth. However, at above optimum temperatures, the beneficial effects of elevated [CO2] are more than offset by negative effects of temperature on yield and yield-components, leading to lower seed yield and poor seed quality Future research should focus on developing genetic and agronomic crop management practices to improve crop productivity under changing climates.
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