基于归一化冠层覆盖系数的玉米果穗发育动态估算.docx

基于归一化冠层覆盖系数的玉米果穗发育动态估算
论文：基于归一化冠层覆盖系数的玉米果穗发育动态估算
摘要：本文基于归一化冠层覆盖系数（NormalizedDifferenceVegetationIndex，NDVI）的原理，研究了玉米果穗发育的动态变化，探讨了NDVI在玉米产量估测中的应用。
为了确定玉米果穗发育与NDVI之间的相关性，本次实验在玉米生长期间，分别于2个不同的生育阶段测量了NDVI值，并且在同一时间记录了样地内的果穗产量。结果表明，在玉米成熟期前期，NDVI值与玉米果穗产量之间无明显的相关性；而在成熟期后期，NDVI值与玉米果穗产量呈现高度的正相关。这说明，在玉米成熟期前期，NDVI不适合用作玉米果穗产量的估测指标，而在成熟期后期，NDVI值的变化可以反映玉米果穗的发育情况。
通过将灰度图像转换为二值图像，本次实验成功地完成了玉米果穗的自动识别。此外，还建立了玉米果穗与NDVI值的模型，以评估果穗发育的进展情况。通过使用该模型，我们成功地对样地内的玉米产量进行了估算，研究结果表明，基于NDVI的模型可以有效地预测玉米的产量，为决定适当的管理措施提供了重要的参考。
综上所述，NDVI是一种可靠的估算玉米果穗产量的指标，在玉米成熟期后期尤其重要。通过对NDVI值的测量和因生发育期而发生的变化进行监测，我们可以更好地把握农作物的生长情况，从而提高农业生产的效率和产量。
关键词：归一化冠层覆盖系数；玉米果穗；产量；模型；监测
Abstract:Basedontheprincipleofnormalizeddifferencevegetationindex(NDVI),thispaperstudiedthedynamicchangesofcorneardevelopmentandexploredtheapplicationofNDVIincornyieldestimation.
InordertodeterminethecorrelationbetweencorneardevelopmentandNDVI,theNDVIvaluesweremeasuredattwodifferentgrowthstagesduringthecorngrowthperiod,andtheearyieldinthesampleareawasrecordedatthesametime.TheresultsshowedthattherewasnoobviouscorrelationbetweenNDVIandcornearyieldintheearlyperiodofcornmaturity,whileahighlypositivecorrelationbetweenNDVIandcornearyieldwasobservedinthelaterperiodofmaturity.ThisindicatesthatNDVIisnotsuitableasaestimatedindicatorofcornearyieldintheearlyperiodofcornmaturity,whilechangesinNDVIvaluescanreflectthedevelopmentofcornearinthelaterperiodofmaturity.
Inthisexperiment,cornearrecognitionwassuccessfullycompletedbyconvertinggrayscaleimagestobinaryimages.Inaddition,amodelofcornearandNDVIvalueswasestablishedtoassesstheprogressofeardevelopment.Usingthismodel,wesuccessfullyestimatedtheyieldofcorninthesamplearea,andtheresultsshowedthattheNDVI-basedmodelcaneffectivelypredicttheyieldofcornandprovideimportantreferencefordeterminingappropriatemanagementmeasures.
Inconclusion,NDVIisareliableindicatorforestimatingcornearyield,especiallyinthelaterperiodofcornmaturity.BymonitoringthechangesinNDVIvaluesduetogrowthstages,wecanbettergraspthegrowthofcropsandimprovetheeffici