|Table of Contents|

Study on Phenological Monitoring of Malus ‘Prairifire’ Flower Stage Based on UAV Imaging Technology

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2024年10
Page:
47-54
Research Field:
Publishing date:

Info

Title:
Study on Phenological Monitoring of Malus ‘Prairifire’ Flower Stage Based on UAV Imaging Technology
Author(s):
FAN Junjun1; JIANG Wenlong2; LIU Xingchen3; XIA Chongli1; ZHANG Wangxiang3; HUANG Jun4
(1.College of Horticulture，Jinling Institute of Technology，Nanjing,Jiangsu 210038；2.Nanjing GTMAP Information Industry Co.Ltd.，Nanjing,Jiangsu 210000；3.College of Forestry and Grassland，Nanjing Forestry University，Nanjing,Jiangsu 210037；4.Nanjing Zhu Lu Jing Guan Engineering Co.Ltd.，Nanjing,Jiangsu 210028)
Keywords:
UAV imaging technology; M.‘Prairifire’; flowering phenology; color parameter; monitoring
PACS:
S 722.5
DOI:
10.11937/bfyy.20233782
Abstract:
Based on UAV imaging technology,images of the phenological period of Malus ‘Prairifire’ were collected，color parameter values (CIE L*,a*,b*) were extracted，and color difference values (ΔE) for different sampling points of phenological periods were calculated.The dynamic monitoring of the flowering phenology of crabapple was realized by comparing ΔE，in order to provide reference for grasping the dynamic phenological changes of crabapple in real time and making timely adjustment strategies，and also provide reference for flower phenological study.The results showed that,1) the color parameters of aerial images of M. ‘Prairifire’ were extracted by Photoshop software.The phenological periods were cluster analyzed based on the phenological color parameters，which could be divided into the germination stage，leaf spreading stage，budding stage，initial flowering stage，full flowering stage，final flowering stage，defoliation stage，fruiting stage，and dormant stage.2) The range of color differences in each phenology period (△E1) and of adjacent phenological periods (△E2) were obtained.A phenological discrimination method was established based on the maximum color difference △E1 max′ in each phenological period and the minimum color difference △E2 min′ between different phenological periods.3) The color parameters of M. ‘Prairifire’ phenological images on two dates (March 22th and April 10th) were randomly selected.The phenological periods of the two dates were determined by cluster analysis to be in the budding stage and full flowering stage respectively，which were consistent with reality.The color difference (ΔE2′) of phenological images between the two dates was 21.8，which was higher than theminimum color difference from the budding stage to the early flowering stage(△E2 min=9.6).This indicated a larger phenological span between these phenological images，which were consistent with reality.In conclusion，this method could easily and efficiently judge the phenological stage of the flowering crabapple.

References:

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Last Update: 2024-06-06