20世纪末华北地区冬小麦物候期监测及时空格局分析  

Analysis of Winter Wheat Phenological Phase Monitoring andSpatio-temporal Pattern in North China at the End of the 20th Century

作　　者：燕雄飞 钟江平 YAN Xiongfei;ZHONG Jiangping(Key Laboratory of Spatial Data Mining&Information Sharing of Ministry of EducationNational Engineering Research Centre of Geospatial Information Technology of Fuzhou University,Fuzhou 350116,China;The Academy of Digital China(Fujian),Fuzhou 350116,China)

机构地区：[1]福州大学福建省空间信息工程研究中心空间数据挖掘与信息共享教育部重点实验室,福建福州350116 [2]数字中国研究院(福建),福建福州350116

出　　处：《测绘与空间地理信息》2021年第1期52-55,61,共5页Geomatics & Spatial Information Technology

基　　金：国家自然科学基金面上基金项目(41471362,41771468);福建省重点科技项目(2017I0008,2017L3012)资助。

摘　　要：基于1983—1999年7 d时间分辨率5 km空间分辨率的AVHRR传感器数据,利用曲线特征点的物候监测方法,反演获得华北地区冬小麦关键物候期并分析其时空演变规律。结果表明:1)冬小麦的拔节期、抽穗期和成熟期主要集中在60—100、105—125和120—155 d。冬小麦物候期空间格局特征和纬度相关,纬度每升高一度冬小麦的拔节期、抽穗期和成熟期分别推迟了5.2、3.5和3.1 d。2)1983年以来,整个研究区的冬小麦物候期呈现提前趋势,每十年冬小麦的拔节期、抽穗期和成熟期分别提前了0.7、3.1、1.9 d。Based on the AVHRR sensor data with 7-day time resolution and 5 km spatial resolution from 1983 to 1999,the key phenological period of winter wheat in north China was obtained by inversion using the phenological monitoring method of characteristic points of the curve,and its spatio-temporal evolution was analyzed.The results showed that:(1)The jointing stage,heading stage and maturity stage of winter wheat were mainly concentrated in 60—100,105—125,and 120—155 days.The spatial pattern characteristics of winter wheat phenology are related to latitude.The jointing,heading,and maturity periods of winter wheat are delayed by 5.2,3.5,and 3.1 days,while the latitude is increased by one degree;(2)Since 1983,the jointing,heading,and maturity periods of winter wheat are advanced by 0.7,3.1,and 1.9 days per decade.

关 键 词：华北地区 冬小麦 物候期 时空演变 

分 类 号：P237[天文地球—摄影测量与遥感]