Han, Jianguo

Liu, Aijun

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings 21st International Grassland Congress / 8th International Rangeland Congress Remote Sensing Monitoring for the Key Phonological Stages of Rangeland — A Case Study about Xilingol Grassland Aijun Liu China Agricultural University, China Jianguo Han China Agricultural University, China Follow this and additional works at: https://uknowledge.uky.edu/igc  Part of the Plant Sciences Commons, and the Soil Science Commons This document is available at https://uknowledge.uky.edu/igc/21/5-1/45 The 21st International Grassland Congress / 8th International Rangeland Congress took place in Hohhot, China from June 29 through July 5, 2008. Proceedings edited by Organizing Committee of 2008 IGC/IRC Conference Published by Guangdong People's Publishing House This Event is brought to you for free and open access by the Plant and Soil Sciences at UKnowledge. It has been accepted for inclusion in International Grassland Congress Proceedings by an authorized administrator of UKnowledge. For more information, please contact UKnowledge@lsv.uky.edu. 瞯 ]690　 瞯 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅰ 　Grasslands/Rangelands Resources and Ecology ——— Application of Information Technology in Monitoring and Managing Grasslands/Rangelands ResourcesRemote sensing monitoring for the key phonological stages of rangeland — a case study aboutXilingol GrasslandL iu A i j un1 ,2 H an Jianguo1 倡1 China A gricultural University Bei j ing 100094 , 2 Inner Mongolia Rangeland Survey & Design Institute Hohhot 010051Key words : the key phonological stages , remote sensing , monitoringIntroduction In the large scale , Clevers ( １９９４ ) and Luedeke ( １９９６ ) etc have monitored the phonological stages of globalvegetation based on NDVI and model , and thought that RS material has capability of detecting the key phonological stages .MethodsCollecting field dataObserving and recording the key phonological stages of each rangeland type every ten days from April to September .Processing RS data２６０ scapes RS material have been processed such as atmospheric calibration , geometry rectification , and composed max valuesof NDVI of every ten days .Defining the key phonological stagesAccording to RS definition of phonological stage by Xin Jingfeng ( ２００１ ) : green‐up stage is a couple of sequential increase ofNDVI in foremost appearance , and maturation stage is as a couple of sequential decrease of NDVI in foremost appearance .Result and testFigure 1 Showed that the change o f NDV I o f every ten dayshas a v isible orderliness , so did the f ield data .Figure 2 Dynamic change f or decadal NDV I and f ield datao f f our ty pes o f grassland( f orbidden‐graz ing) .Conclusion and discussion The change of NDVI of every ten days can distinguish the change rules of phonological stage ,particularly two key stages : green‐up phase and maturation phase . But most importantly , to select suitable training areas iscritical in using RS material of multi‐time series .ReferencesClevers , J . G . P . W . A framework for monitoring crop grow th by combining directional and spectral remote sensinginformation . [ J] Remote Sensing o f Env ironment , １９９４ ,２５ : １６１‐１７０ .Xin Jingfeng . The study for crop grow th simulation based on RS technology . [D] ,２００１ :３８‐４１ .l. 0000 0. 9000 0. 8000 0. 7000 f 0 . 6000 i o. 5000 c5 0. 4000 ~ ~ 0. 3000 z: 0 . 2000 0 . 1000 -+- j'j\JJ)!f:i\l:ffi (Desert grassland) -El- !il!il'/1/[ffi (Typical grassland) ---+- i':l>:li!l:1\[Jll\ (Sand grassland) ~ 1\[{ij]:1\[ffi (Meadow grassland) 0. OOOO c_~~~~~~~~~~~~~~-~~~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ... 'C 'C ~ ~ ~ ~ ... ... ... ... ... ... ... ... ... ... ... ~ C ... ... ... ... M 0 N M ... ~ ~ "' ro cs, 0 N ;;; ~ ~ "' N N N N N N N decade ('aJ/t) ___,._ 1\[ {ijJ 1/i ffi (meadow grassland) * 7 0 0 ~J!l,t.11'11/i ffi (typical grassland) :,.i:z ---- :m ~ 1/i ffi (desert grassland) J;1- 6 0 0 '-.. -lo,( 5 0 0 ";;, <Jl 4 0 0 nit "' 8 NS ill\ .s --..,_ "" 3 0 0 WI e • 2 0 0 :i¥ -J:l1 I O 0 .L ~ 0 10th 12th 14th 16th 18th 20th 22th 24th 1UJt (Decade) 

Remote Sensing Monitoring for the Key Phonological Stages of Rangeland — A Case Study about Xilingol Grassland

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Remote Sensing Monitoring for the Key Phonological Stages of Rangeland — A Case Study about Xilingol Grassland

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