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Abstract

Global surface mean temperature is supposed to increase by 1.4-5.8�°C by the end of 21st century according to IPCC 2014. Temperature rise would bring a deterioration of rice quality especially to chalk characteristic. In order to better cope with the challenges of global warming, effects of nitrogen spikelet fertilizer on rice quality under elevated temperature during grain filling stage were investigated. FATE facility was used to increase the rice canopy during grain filling stage and different growth regimes including CK (no warming with any nitrogen spikelet fertilizer application), ET (elevated temperature with no nitrogen spikelet fertilizer application), ET+N (elevated temperature with nitrogen spikelet fertilizer application), CK+N (no warming with nitrogen spikelet fertilizer application) were conducted. Results showed that elevated temperature decreased the performance quality and cooking quality, while nutritional quality and eating quality were relatively increased. Grain filling rate and amyloplast development for both superior and inferior grains were obviously accelerated during early grain filling stage by elevated temperature and application of nitrogen spikelet fertilizer sufficiently inhibited the deterioration of rice quality particularly for chalk performance without decreasing the grain weight. The above evidence indicates the application of nitrogen spikelet fertilizer is a proper method in mitigating the quality deterioration under global warming.

Biography

Email: tangshe@njau.edu.cn