基于无人机多光谱数据的柑橘叶面积指数反演

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关键词：柑橘（Citrusreticulata）；无人机多光谱；叶面积指数 （LAI） ；Boruta_BPNNR模型；反演中图分类号：S123；S666 文献标识码：A

文章编号：0439-8114（2025）08-0024-07

DOI：10.14088/j.cnki.issn0439-8114.2025.08.004 开放科学（资源服务）标识码（OSID）：i

UAVmultispectral data-basedleafarea indexretrieval forcitrus

CHEN Zhi-yu1，DOU Shi-qing²

Scholof Urban-Rural Planning and Construction，Guiyang VocationalandTechnical Collge，Guiyang 55oo81，China; 2.College ofGeomatics and Geoinformation，Guilin Universityof Technology，Guilin 5410o6，Guangxi，China）

Abstract：Citrus（Citrusreticulata）wasselectedas theresearchobject，andUAVmultispectraldataandcitrus leaf area index （ LAI ）datawerecollected.Afterbandselectionandcombinationofthemultispectraldata，threefeatureprocesingapproaches（Borutaalgorithm，RFECVmethod，andnofeatureselection）wereemployed，eachcombinedwiththre machinelearningregresionmodels（supportvectorregression（SVR），randomforest regression（RFR），andackpropagationneuralnetworkregresson（BPNNR）） to construct nine combined models for LAI estimation.The model parameters were optimized using the GridSearchCV method，the accuracy and stability of each model were compared，the optimal LAI prediction model was selected，and a spatial distribution image ofcitrus LAI was generated.Theresults showedthat the Boruta algorithmcould effectivelyselectfeature variablesand reduce model overfitting. Among the nine combined models，the Boruta_BPNNR model performed best in citrus LAI estimation，exhibiting low data dispersion and a high degree of fit between the regression curve and the diagonal line. The LAI retrieval results indicated that the spatial distribution of LAI in the study area showed a distinct north-south gradient difference，with LAI generally higher in the northern regionthannthesouthernregion.Thiswasbasicallconsistentwiththespatialpaternobservedinthefieldsurvey，wherecitrusgrowth was lush in the north region and relatively sparse in the south region.

Key Words：citrus（Citrus reticulata）； UAVmultispectral; leaf area index （LAI）；Boruta_BPNNR model; retrieval

柑橘（Citrusreticulata）产业已成为南方主产区推动农业高效发展和促进农民增收的重要支柱。（剩余9677字）