滇中高原地区耕地利用对气候暖干化的响应  

Response of the cultivated land use structure to climate warming and drying in central Yunnan Plateau

作　　者：童绍玉 周跃[3] 彭海英[2] TONG Shao-yu;ZHOU Yue;PENG Hai-ying(School of Urban and Environment,Yunnan University of Finance and Economics,Kunming 650021,China;Institute of Land Resources and Sustainable Development,Yunnan University of Finance and Economics,Kunming 650021,China;Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]云南财经大学城市与环境学院,昆明650021 [2]云南财经大学国土资源与持续发展研究所,昆明650021 [3]昆明理工大学环境科学与工程学院,昆明650093

出　　处：《湖北农业科学》2023年第1期23-30,共8页Hubei Agricultural Sciences

基　　金：云南省哲学社会科学基地项目(JD2018YB03)。

摘　　要：为了研究滇中高原地区的气候变化对当地耕地利用方式产生的影响,构建耕地利用的区域灌溉需水程度指数,定量表达区域耕地种植结构的变化特征和区域耕地利用结构对气候因子变化的响应。结果表明,1998—2019年研究区气候有显著的暖干化趋势,平均增温速率达0.35℃/10a,降水量平均下降速率为79.15mm/10a,Kira干湿度指数的平均下降速率为0.65/10a;同时,区域耕地利用结构呈“旱化”趋势,灌溉需水量相对较小的作物占比大幅上升,而灌溉需水量相对较大的作物占比快速下降;在播种面积增加的背景下,耕地利用的区域灌溉需水程度指数呈下降趋势;主要作物播种面积、耕地利用的区域灌溉需水程度指数与年平均气温、降水量、Kira干湿度指数有显著相关性,区域耕地利用结构对气候暖干化的响应方式表现为耕地利用结构的“旱化”,且这种响应具有滞后性。In order to study the impact of climate change on local cultivated land use patterns in central Yunnan Plateau,the regional irrigation water demand index of cultivated land use was constructed to quantitatively express the change characteristics of regional cultivated land planting structure and the response of regional cultivated land use structure to climate change.The results showed that the climate in the study area had a significant warming and drying trend,with an average warming rate of 0.35℃/10 a,an average precipitation decreasing rate of 79.15mm/10 a,and an average decreasing rate of Kira dry-humidity index of 0.65/10 a from 1998 to 2019.At the same time,the regional cultivated land use structure showed a continuous trend of“drought”,and the proportion of crops with relatively small irrigation water requirements increased significantly,while the proportion of crops with relatively large irrigation water requirements decreased rapidly.Under the background of continuous increase of sown area,the index of irrigation water requirement of regional cultivated land utilization decreased continuously.The sown area of main crops and irrigation water demand index of regional cultivated land use were significantly correlated with mean annual temperatures,precipitation and Kira’s humidity/aridity index.The response of regional cultivated land use structure to climate warming and drying was“drought”,and this response had a lag.

关 键 词：区域灌溉需水程度指数 灌溉需水量 气候暖干化 滞后相关系数 累积滞后效应 滇中高原 

分 类 号：P967[天文地球—自然地理学]