CO_2浓度及环境温度增加对寒地粳稻不同品种倒伏风险的影响

为了探究气候变化可能对水稻倒伏风险造成的影响,利用构建的人工气候室,调控CO_2浓度并实时监控环境温度,选择不同抗倒能力品种龙庆稻1号、龙稻5号,设置不同的CO_2浓度(对照:384μmol·mol~(-1),升高处理584μmol·mol~(-1)),并检测两年的环境温度,来评估和量化水稻不同品种响应气候变化的倒伏风险。结果表明:CO_2浓度对不同品种抗倒伏性影响极显著,CO_2浓度增加与环境温度升高共同作用增加了龙稻5号的倒伏风险,主要是因为环境因素的改变增加了株高。环境温度的升高可使水稻基部节间伸长从而增加了倒伏风险。从试验数据发现,CO_2浓度增加与环境温度升高对不同水稻品种倒伏风险影响的结果呈现不同趋势,因此,日后可通过培育适应气候变化的新品种抵御倒伏风险。

Effect of the Increasing of CO2 Concentration and Environmental Temperature on Lodging Risk of Different Cold Rice Varieties

In order to explore the impact of climate change which may cause the risk of rice lodging ,the con‐structed artificial climate chamber was used to regulate the concentration of CO 2 and implementation of the mo‐nitoring of environmental temperature ,taking different varieties of rice lodging resistance Longqing 1 and Longdao 5 as materials ,set the CO2 of different concentrations (contrast∶384 μmol·mol‐1 ,elevated treatment∶584 μmol·mol‐1 ) ,and the two years of environmental temperature were detected to evaluate and quantify the risk of lodging in response to climate change .The results showed that the increase of CO2 concentration was significant on the lodging resistance of different varieties ,however ,the increase of CO2 concentration and envi‐ronmental temperature effect increased for Longdao 5 of the lodging risk ,because of changes in environmental factors the plant height and biological yield increased .The ambient temperature could make rice internode elon‐gation and thus increase the risk of lodging .It was found that from the experimental data ,the increase of CO2 concentration and environmental temperature for different rice varieties showed different trends of lodging risk , therefore ,in future ,cultivation of new varieties could adapt to climate change and resist lodging risk .