A Case Study on Overlapped Chilling with Heat Injury on Rice Crop
Abstract: Crops are increasingly influenced by abnormal meteorological conditions nowadays. Meanwhile we know little on how the abnormal meteorological factors would impact the crop growth. A rare sterility hazard, a typical damage from abnormal temperature, happened to mid-rice at anthesis stage in Jianghan Plain, Hubei, China in 2007. But it is bewildering to determine the exact cause for the hazard. We compared the data from field experiment, the varieties tests over the area and the meteorological records across the damaging period to find a possible cause for rice sterility. The result showed that during 20, July to 25, July, some parts of the area undergone a shape decrease of temperature, and the daily mean temperature was lower than 20˚C exactly and surpassed the chilling damaging point for ear-formation. Meanwhile, from 6 August to 10 August, the time when rice was flowering, a continuous temperature lift happened, namely more than 30˚C in daily mean temperature or 35˚C in daily maximum temperature. In addition, the varieties that flowered at 6-13 August should undergone their meiosis stage of pollen mother cells in several days after 24 July. By matching the injuries data from the different areas against the meteorological regimes those crops experienced, we concluded with a category map of the areas in rice sterility degree: some are caused mostly by the cold weather; some are mostly by the high temperature weather; and some by an overlapped bad weather, namely cold weather at first at meiosis, then heat at anthesis. Among them, the overlapped type happened at a moderate scale in area but the loss was the biggest. This case suggests that global warming may induce more complex and severer damage to crops, so the countermeasures are urgently needed.
文章引用: 刘 冲 , 熊昌元 , 吴晨阳 , 林俊城 , 黄永平 , 肖 宇 , 松井勤 , 田小海 (2013) 水稻组合气象灾害的一个实例研究。 气候变化研究快报， 2， 186-192. doi: 10.12677/CCRL.2013.24032
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