退化草地封育恢复的监测方法研究  

Study on Monitoring Method of Enclosure and Recovery of Degraded Grassland

作　　者：王婧[1] 张玮[1] 

机构地区：[1]中国农业大学信息与电气工程学院,北京100083

出　　处：《安徽农业科学》2009年第1期422-424,440,共4页Journal of Anhui Agricultural Sciences

基　　金：国家863项目"退化草地封育恢复的数字化管理技术"(20-06AA10Z250)

摘　　要：[目的]为封育恢复退化草地提供参考。[方法]对锡林浩特市2000和2007年遥感影像进行预处理,采用OIF指数法,选出最佳波段组合,通过非监督分类与监督分类相结合的方法提取草地围栏信息。通过实地调查对提取结果进行精度评价,构建综合监测评价模型,对退化草地的封育恢复进行评价与监测。[结果]建立了草地退化围栏封育综合评价公式:围栏评价指数=SH.f(S)f(H)f(D)f(J)。可用于研究围栏内外的草地退化现状和程度。围栏防护后,改善草地退化状况。锡林浩特市2007、2000年的草围栏面积为1 787.725 9828、01.046 230 km2。围栏封育评价结果表明1号样点属于轻度退化,而111、2号样点都属于严重退化。[结论]围栏评价指数可以更好地反映草地退化程度及围栏内外的差异。[Objective] The aim was to provide the reference for the enclosure and recovery of degraded grassland.[Method] The remote sensing image of Xilinhot City in 2000 and 2007 was pretreated and the OIF index method was taken to select the optimal band combination.Through the method of unsupervised classification combining with supervised classification,the grassland enclosure information was extracted.The precision of extracted result was evaluated by field survey.The comprehensive monitoring and evaluating model was established to monitor and evaluate the enclosure and recovery of degraded grassland.[Result] The comprehensive monitoring evaluation model was established to evaluate and monitor the enclosure and recovery of degraded grassland.Enclosure evaluating index=SH·f（S）f（H）f（D）f（J）.It could be used to investigate the status and degree of grass degradation in the internal and external of enclosure.After enclosure protection,the grass degradation status was improved.The enclosure area of Xilinhot City in 2007 and 2000 was 1 787.725 982 and 801.046 230 km2 resp.The evaluation result of enclosure and recovery showed that sample point 1 belonged to light degradation and sample point 11,12 belong to severe degradation.[Conclusion] Enclosure evaluating index could better reflect the grass degradation extent and the difference of internal and external of enclosure.

关 键 词：草地退化 遥感监测 草围栏 

分 类 号：S812[农业科学—草业科学]