【摘要】 依托农业水利灌溉水平衡实验设施,在上海市青浦区利用红外线辐射器对稻田生态系统进行了野外增温实验,结果表明:当土壤温度升高1~3℃,且保持现有农业管理方式不变的情景下,水稻的地上生物量下降了17.97%,稻谷产量下降了10.19%;稻田生态系统的水循环加速,水稻耗水量增加了14.4%,产量水平上的水分利用效率下降了24.1%.更多还原

【Abstract】 In Qingpu district of Shanghai,based on the measurements of Agricultural Water Irrigation Technology Station,we developed a warming experiment on paddy field ecosystem using the infrared heater,meanwhile,kept the soil water table(sometimes aboveground) of warming and control plots at the same level.The results showed that,under the scenario of climate warming(1—3℃ increase in temperature) without changing the current agricultural management,rice growth was suppressed during the whole growth season,the biomass aboveground and yield of rice decreased 17.97% and 10.19%,respectively.The water cycle of paddy field ecosytem accele-rated with the rising in temperature.The cost of water for rice increased 14.4%,the utilization rate of water has a 24.1% of decrease as for the yield of rice.更多还原