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- W2969515280 abstract "Cold temperature limits rice productivity in high-altitude and high-latitude areas, and nitrogen (N) plays an important role in rice growth and development. However, information on N accumulation in relation to photosynthetic production in japonica rice under low water temperature (Tw) conditions during reproductive growth is very limited. In this study, we investigated the effects of low Tw during reproductive growth on the photosynthetic production and N uptake dynamics that affect growth and yield in two japonica rice cultivars (DN428 and SJ10) from 2015 to 2016. The rice was subjected to 17 °C Tw for different lengths of time (three, six, nine, twelve, and fifteen days) during reproductive growth. The results showed that the N uptake of rice was severely affected by the low-Tw treatment during reproductive growth and gradually decreased with an increase in low-Tw treatment duration. A significant decrease in the seed setting rate was the main cause of the decline in yield. The decrease in N uptake led to a decrease in the leaf area index (LAI) and net photosynthetic rate (Pn), which led to the inhibition of the normal development of panicles. A decrease in grain weight was another main reason for the significant drop in yield. The low-Tw treatment decreased the grain N yield (by 4–36% for cv. DN428 and 9–47% for cv. SJ10), N utilization efficiency for grain production (by 2–13% for cv. DN428 and 8–14% for cv. SJ10) and N utilization efficiency for biomass production (by 4–10% for cv. DN428 and 6–12% for cv. SJ10) in comparison to those in the control. The spike N concentration at maturity was significantly increased by the low-Tw treatment in both years (by 5–17% for cv. DN428 and 5–13% for cv. SJ10). The decline in grain number is an important factor causing the decrease in grain N yield, although the spike N concentration significantly increased under the low-Tw treatment." @default.
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- W2969515280 date "2019-10-01" @default.
- W2969515280 modified "2023-09-25" @default.
- W2969515280 title "Effects of low water temperature during reproductive growth on photosynthetic production and nitrogen accumulation in rice" @default.
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- W2969515280 doi "https://doi.org/10.1016/j.fcr.2019.107587" @default.
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