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1、棉花学报CottonScience2014袁26渊6冤院555~562利用光谱-盐分指数监测棉田土壤盐分1,21,2*1,231331,2李静袁王克如袁李少昆袁陈兵袁肖春花袁王琼袁王方永袁李栓明袁41,21,2赖军臣袁孙亚玲袁张国强渊1.石河子大学绿洲生态农业重点实验室袁新疆石河子832003曰2.中国农业科学院作物科学研究所/农业部作物生理生态重点实验室袁北京100081曰3.新疆农垦科学院棉花研究所袁新疆石河子832003曰4.新疆生产建设兵团第六师农业局袁新疆五家渠市831300冤摘要院通过对棉田土壤盐分的光谱反演研究袁为土壤盐渍化遥感动态监测提供可能遥
2、利用ASD地物光谱仪测定新疆兵团第六师共青团农场盐渍化棉田土壤光谱袁结合土壤化学参数分析确定反映棉田土壤盐渍化程度的敏感波段袁构建最佳盐分指数对棉田土壤盐分进行监测遥结果表明袁随盐渍化程度渊0.084～1.659g窑kg-1冤的加重袁土壤光谱反射率呈上升趋势袁在近红外区(1350～1850nm)差异尤为显著袁该波段范围光谱反射率与土壤盐分呈极显著相关渊=0.880**冤袁且对土壤盐分响应敏感袁为识别盐渍化土壤的敏感波段曰选择盐渍化光谱敏感波段建立了盐分指数SI1袁BI袁SI2袁NDSI袁SI3监测棉田土壤盐渍化的模型袁其中SI1和BI的RMSE分别为0.151
3、和0.149尧RE为7.5%和6.3%袁预测能力强袁可推荐为棉田土壤盐分监测的最佳模型遥关键词院棉田曰光谱-盐分指数曰土壤盐渍化曰监测中图分类号院S562.01文献标志码院A文章编号院1002-7807渊2014冤06-0555-081,21,2*1,23*133LiJing,WangKeru,LiShaokun,ChenBing,XiaoChunhua,WangQiong,WangFangyong,Li1,241,21,2Shuanming,LaiJunchen,SunYaling,ZhangGuoqiang(1.832003;2.100081,;3.832
4、003,;4.831300,)Weconductedremotesensingdynamicmonitoringofsoilsalinizationbysoilsalt-spectruminversionincottonfields.AnASDspectrometerwasusedtomeasurethecottonsoilspectraintheCommunistYouthLeaguefarmofthesixthdivisionoftheXinjiangProductionandConstructionCorps.Themostsensitivewaveba
5、ndformeasuringthesoilsalinizationdegreewasdeterminedbycombinedanalysisofspectralandsoilchemistryparameters,andthebestsaltindexformonitoringsoilsaltcon-学报页脚tentincottonfieldswasdetermined.Theresultsshowedthatsoilspectralreflectanceincreased(0.084-1.659g窑kg-1)withincreas-ingsalinizati
6、ondegree,andthedifferencewasmoreobviousinthenearinfraredregion(1350-1850nm).Thisbandrangeofspectralreflectancewasthemostsensitivewavelengthforidentifyingsalinizedsoilandwassignificantlycorrelatedwithsoilsalt(=0.880**).Byselectingsensitivebands,saltindexmodelsincludingSI,BI,SI,NDSIan
7、dSIwereconstructedtomonitorsoil123salinization.Amongthemodels,theSI1andBIsaltindexeswerethemostaccurate,withaminimumRMSEof0.151and0.149,andREof7.5%and6.3%,respectively.Werecommendtheseasthebestmodelstomonitorsoilsalinityincottonfields.cottonfields;spectrum-saltindex;soilsalinization
8、;monitoring[1]土壤盐渍化
