河南农业科学 ›› 2021, Vol. 50 ›› Issue (10): 163-171.DOI: 10.15933/j.cnki.1004-3268.2021.10.021

所属专题: 遥感助力农业信息精准监测专题

• 农业信息与工程·农产品加工 • 上一篇    下一篇

近地遥感监测冬小麦关键发育时期的方法研究

魏庆伟1,2,朱黎明3,王福州1,2   

  1. (1.中国气象局·河南省农业气象保障与应用技术重点开放实验室,河南郑州450003;2.鹤壁市气象局,河南鹤壁458030;3. 扬州大学水利科学与工程学院,江苏扬州225009)
  • 收稿日期:2021-06-12 出版日期:2021-10-15 发布日期:2021-11-25
  • 通讯作者: 朱黎明(1988-),男,江苏徐州人,讲师,博士,主要从事农业气象研究。E-mail:zhuliming@yzu.edu.cn
  • 作者简介:魏庆伟(1988-),男,河南巩义人,工程师,硕士,主要从事农业气象与遥感研究。E-mail:wqw08dx@126.com
  • 基金资助:
    中国气象局·河南省农业气象保障与应用技术重点开放实验室研究基金项目(KM201929,AMF202003);江苏省博士后科研资助计划项目(2020Z223);扬州市“绿杨金凤计划”项目

A Method for Monitoring the Critical Growth Stages of Winter Wheat by Using Near‑earth Remote Sensing

WEI Qingwei1,2,ZHU Liming3,WANG Fuzhou1   

  1. (1.CMA·Henan Key Laboratory of Agrometeorological Support and Applied Technique,Zhengzhou 450003,China;2.Hebi Meteorological Bureau,Hebi 458030,China;3.College of Hydraulic Science and Engineering,Yangzhou University,Yangzhou 225009,China)
  • Received:2021-06-12 Published:2021-10-15 Online:2021-11-25

摘要: 为探寻准确高效的冬小麦关键发育时期监测方法,首先利用归一化植被指数测量仪(SRS-NDVI)监测了河南省鹤壁市农业气象试验站2017—2018、2018—2019年度冬小麦生长季的时序归一化植被指数(Normalized difference vegetation index,NDVI);然后,采用邻域差值分析法重构时序NDVI,并运用S-G滤波法(Savitzky‑golay,S-G)平滑处理时序NDVI中异常值;最后,根据冬小麦生长季NDVI变化特点,综合运用广义动态阈值法、曲线速率法和极值法,提取冬小麦关键发育时期特征点。结果表明,邻域差值分析法可有效去除观测数据的明显异常值,经S-G滤波法处理后的NDVI时序数据,更加符合冬小麦生长过程NDVI变化规律。此外,NDVI时序数据监测发育时期平均误差为2.5 d,精度较卫星遥感监测冬小麦发育时期明显提高。

关键词: 近地遥感, 冬小麦, 生长季, 发育时期, SRS-NDVI, 时间序列

Abstract: The aim is to explore the effective method for monitoring the critical growth stages of winter wheat.Firstly,the device for measuring normalized vegetation index(SRS‑NDVI)was used to monitor time series normalized difference vegetation index(NDVI)of winter wheat growing season in 2017—2018 and 2018—2019 at Hebi Agrometeorological Experimental Station. Then,the neighborhood difference analysis method was used to reconstruct time series normalized difference vegetation index,and the S‑G filtering method(Savitzky‑golay,S‑G)was used to smooth the noise in normalized difference vegetation index time series.Finally,according to the characteristics of normalized difference vegetation index time series,the generalized dynamic threshold method,curve rate method and extreme value method were used to extract the key growth stages of winter wheat. The results showed that the neighborhood difference analysis method could effectively remove obvious abnormal values in normalized difference vegetation index time series. Besides,the normalized difference vegetation index time series processed by S‑G filtering method was more in line with the normalized difference vegetation index change rule of winter wheat.In addition,the average error of the critical growth stages of winter wheat was 2. 5 days,and the accuracy was significantly higher than that extracted by using satellite remote sensing.

Key words: Near-earth remote sensing, Winter wheat, Growing season, Growth stages, SRS-NDVI, Time series

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