摘要
针对当前农业用水领域研究对种植制度及物候信息与补水需求量的量化关系刻画不足的问题,选取2000—2019年中国主粮作物的物候信息刻画主粮的种植制度、生长阶段以及农作物更替情况,进而基于植被归一化指数、潜在蒸散发及降水数据,利用作物系数法核算了补水需求量,并量化了其与种植制度的关联。结果表明:补水需求量在时间与空间上均呈现显著异质性,年际波动范围为659亿~1273亿m^(3),高值年份多与干旱事件同步,补水需求量的高值区集中于黄淮海平原与长江中下游等复种高强度区域;因作物生长旺盛期与降水高峰在时空上存在显著错位,补水需求量具有明显季节性峰值(5—8月);小麦玉米轮作的单位面积补水需求量均值在2000—2019年持续高于其他种植制度,成为影响补水需求量空间格局变化的主导因素。
To address the insufficient quantitative characterization of the relationship between cropping systems,phenological information and irrigation water demand(IWD),this study utilized phenological data of staple crops in China from 2000 to 2019 to characterize cropping systems,growth stages and crop rotation patterns.Based on the normalized difference vegetation index,potential evapotranspiration and precipitation data,the IWD was estimated using the crop coefficient method,and its linkage with cropping systems was quantified.The results show that the IWD exhibited significant spatiotemporal heterogeneity,with interannual fluctuations ranging from 65.9 billion to 127.3 billion m^(3).High-IWD years were generally synchronized with drought events,and high-IWD regions were concentrated in high-intensity multiple-cropping regions,such as the Huang-Huai-Hai Plain and the middle-lower reaches of the Yangtze River.Due to the significant spatiotemporal mismatch between the peak crop growth periods and the peak precipitation period,the IWD showed distinct seasonal peaks from May to August.The mean unit-area IWD of the wheat-maize rotation system was consistently higher than those of other cropping systems from 2000 to 2019,making it the dominant factor influencing the spatial distribution of IWD.
作者
曹永强
刘子华
常奂宇
么嘉棋
公海莹
郭雪儿
郑恒梁
CAO Yongqiang;LIU Zihua;CHANG Huanyu;YAO Jiaqi;GONG Haiying;GUO Xue’er;ZHENG Hengliang(Academy of Eco-civilization Development for Jing-Jin-Ji Megalopolis,Tianjin Normal University,Tianjin 300387,China)
出处
《水利水电科技进展》
2025年第5期148-154,共7页
Advances in Science and Technology of Water Resources
基金
国家自然科学基金(52579016,52379021,52409041,42301501)
天津师范大学研究生科研创新项目(2024KYCX050Z,2025KYCX003Z)。
关键词
种植制度
补水需求
主粮作物
农业水资源管理
粮食安全
cropping systems
irrigation water demand
staple crops
agricultural water resource management
food security
作者简介
曹永强(1972-),男,教授,博士,主要从事水土能碳互馈及调控机制研究。E-mail:caoyongqiang@tjnu.edu.cn。
