大气CO_(2)浓度升高对长江中下游地区水稻灌溉需水量的影响  

Effects of increased atmospheric CO_(2)concentration on water demand for rice irrigation in middle and lower reaches of Yangtze River

作　　者：孙博凯 王卫光 刘国帅[1,2] SUN Bokai;WANG Weiguang;LIU Guoshuai(State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai University,Nanjing 210098,China;College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098 [2]河海大学水文水资源学院,江苏南京210098

出　　处：《水利水电科技进展》2023年第3期22-27,共6页Advances in Science and Technology of Water Resources

基　　金：国家自然科学基金(51979071)。

摘　　要：利用1981—2013年长江中下游地区127个气象站的观测资料与历史大气CO_(2)浓度数据,对考虑和不考虑大气CO_(2)浓度变化的水稻需水量进行模拟,分析了大气CO_(2)浓度上升对长江中下游地区水稻需水量的影响。结果表明:不考虑大气CO_(2)浓度时,长江中下游地区水稻需水量多年平均值为400.16 mm,空间分布具有明显差异;考虑大气CO_(2)浓度会使水稻需水量比未考虑大气CO_(2)浓度时平均下降1.6%左右;大气CO_(2)浓度每上升1μmol/mol,研究区水稻需水量平均下降0.071 mm;各子流域的灌溉需水量因有效降水量不同而具有一定差异,考虑大气CO_(2)浓度变化时,长江中下游地区水稻年需补充灌溉总量减少4.24 km^(3)。Based on the observation data of 127 meteorological stations and historical atmospheric CO_(2)concentration data in the middle and lower reaches of the Yangtze River from 1981 to 2013,the water demand of rice was simulated with the change of atmospheric CO_(2)concentration considered or not.The influence of atmospheric CO_(2)concentration rise on the water demand of rice in the middle and lower reaches of the Yangtze River was analyzed.The results show that,without considering the atmospheric CO_(2)concentration,the annual average water demand of rice in the middle and lower reaches of the Yangtze River was 400.16 mm,and the spatial distribution was obviously different.The water demand of rice considering atmospheric CO_(2)concentration decreased by about 1.6%on average compared with that without considering CO_(2)concentration.For every 1μmol/mol increase in CO_(2)concentration,the average water demand of rice in the study area decreased by 0.071 mm.The water demand for irrigation in each sub-basin varies due to different effective rainfall.Considering the change of atmospheric CO_(2)concentration,the total irrigation water demand for rice in the middle and lower reaches of the Yangtze River decreased by 4.24 km^(3).

关 键 词：大气CO_(2)浓度 灌溉需水量 水稻 长江中下游 

分 类 号：S161[农业科学—农业气象学] TV93[农业科学—农业基础科学]