%0 Journal Article %1 ISI:000342318400010 %A Xie, Xiaojin %A Zhang, Yaohong %A Li, Renying %A Yang, Xihua %A Shen, Shuanghe %A Bao, Yunxuan %A Shen, Xiaohui %A Jiang, Xiaodong %D 2014 %J SOIL SCIENCE AND PLANT NUTRITION %K citeulikeExport maybenewrefsforco2 %N 4 %R \%7B10.1080/00380768.2014.907531\%7D %T Asymmetric warming effects on N dynamics and productivity in rice (Oryza sativa L.) %U http://dx.doi.org/\%7B10.1080/00380768.2014.907531\%7D %V 60 %X Climate warming exhibits strong diurnal variations, with higher warming rates being observed at nighttime, which significantly affects rice (Oryza sativa L.) growth and grain yield. The objective of this study was to determine the effects of asymmetric warming (all-day warming, AW; daytime warming from 07: 00 to 19: 00, DW; nighttime warming from 19: 00 to 07: 00, NW, and a control, CK) on rice nitrogen (N) dynamics and productivity. Two rice bucket warming experiments were performed in Nanjing in Jiangsu Province, China, using the free air temperature increase (FATI) technique. The daily mean temperatures in the rice canopy in the AW, DW and NW plots were 2.0, 1.1 and 1.3 degrees C higher than those in the rice canopy in the CK plots, respectively. The results indicated that the total N accumulation of rice was 8.27-40.53\% higher in the warming treatment than in the control during the jointing, anthesis and maturity stages. However, there was no significant difference detected among the three warming treatments. The warming treatment substantially decreased N translocation efficiency, leading to the retention of more N in the plant stems during grain filling. The warming treatment also decreased the N harvest index, N utilization efficiency based on grain yield and N utilization efficiencies based on biomass in both growing seasons. The warming treatment significantly increased the aboveground biomass (9.26-16.18\%) in the jointing stage but decreased it (2.75-9.63\%) in the maturity stage. Although DW increased the carbon (C) gain by photosynthesis and NW increased the C loss by night respiration, the daytime higher-temperature treatment affected rice photosynthesis and reduced its photosynthetic rate and product. This effect may be one of the primary reasons for the insignificant difference in the aboveground biomass between the DW and NW treatments. In the AW, DW and NW plots, the grain yield was reduced by an average of 10.07, 5.05 and 7.89\%, respectively, across both years. The effective panicles and grains per spike tended to decrease in the warmed plots, whereas irregular changes in the 1000-grain weight were observed. Our results suggest that under the anticipated climate warming, rice productivity would further decline in the Yangtze River Basin.

@article{ISI:000342318400010, abstract = {{Climate warming exhibits strong diurnal variations, with higher warming rates being observed at nighttime, which significantly affects rice (Oryza sativa L.) growth and grain yield. The objective of this study was to determine the effects of asymmetric warming (all-day warming, AW; daytime warming from 07: 00 to 19: 00, DW; nighttime warming from 19: 00 to 07: 00, NW, and a control, CK) on rice nitrogen (N) dynamics and productivity. Two rice bucket warming experiments were performed in Nanjing in Jiangsu Province, China, using the free air temperature increase (FATI) technique. The daily mean temperatures in the rice canopy in the AW, DW and NW plots were 2.0, 1.1 and 1.3 degrees C higher than those in the rice canopy in the CK plots, respectively. The results indicated that the total N accumulation of rice was 8.27-40.53\% higher in the warming treatment than in the control during the jointing, anthesis and maturity stages. However, there was no significant difference detected among the three warming treatments. The warming treatment substantially decreased N translocation efficiency, leading to the retention of more N in the plant stems during grain filling. The warming treatment also decreased the N harvest index, N utilization efficiency based on grain yield and N utilization efficiencies based on biomass in both growing seasons. The warming treatment significantly increased the aboveground biomass (9.26-16.18\%) in the jointing stage but decreased it (2.75-9.63\%) in the maturity stage. Although DW increased the carbon (C) gain by photosynthesis and NW increased the C loss by night respiration, the daytime higher-temperature treatment affected rice photosynthesis and reduced its photosynthetic rate and product. This effect may be one of the primary reasons for the insignificant difference in the aboveground biomass between the DW and NW treatments. In the AW, DW and NW plots, the grain yield was reduced by an average of 10.07, 5.05 and 7.89\%, respectively, across both years. The effective panicles and grains per spike tended to decrease in the warmed plots, whereas irregular changes in the 1000-grain weight were observed. Our results suggest that under the anticipated climate warming, rice productivity would further decline in the Yangtze River Basin.}}, added-at = {2019-03-31T01:14:40.000+0100}, author = {Xie, Xiaojin and Zhang, Yaohong and Li, Renying and Yang, Xihua and Shen, Shuanghe and Bao, Yunxuan and Shen, Xiaohui and Jiang, Xiaodong}, biburl = {https://www.bibsonomy.org/bibtex/2525e9a129c8218c72aff7f604a798795/dianella}, citeulike-article-id = {13888250}, citeulike-linkout-0 = {http://dx.doi.org/\%7B10.1080/00380768.2014.907531\%7D}, doi = {\%7B10.1080/00380768.2014.907531\%7D}, interhash = {f69450178a6c298e421df1a45986acc6}, intrahash = {525e9a129c8218c72aff7f604a798795}, journal = {{SOIL SCIENCE AND PLANT NUTRITION}}, keywords = {citeulikeExport maybenewrefsforco2}, number = {{4}}, posted-at = {2015-12-21 08:15:53}, priority = {2}, timestamp = {2019-03-31T01:16:26.000+0100}, title = {{Asymmetric warming effects on N dynamics and productivity in rice (Oryza sativa L.)}}, url = {http://dx.doi.org/\%7B10.1080/00380768.2014.907531\%7D}, volume = {{60}}, year = {{2014}} }