| 基于SPOT5影像的稻田土壤养分的Co-kriging插值研究 |
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| 作者单位： | 浙江大学农业遥感与信息技术应用研究所 |
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| 摘 要： | 以湖州一块3.34hm2的水稻田为试验区,在ARCVIEW和ERDAS Image8.4平台上结合地统计学,研究以植被指数为协因子的土壤全N的Co-kriging插值效果。分析结果表明:水稻生长期的SPOT5卫星多光谱信息构建的植被指数,反映了水稻的生长状况,在一定程度上间接地反映了土壤的养分状况,特别是土壤速效N、速效P、全N的状况;其中将比值植被指数(RVI)和归一化植被指数(NDVI)作为协因子,参与土壤全N的Co-kriging插值,插值精度有所提高。
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| 关 键 词： | Co-kriging插值 NDVI RVI 空间变异 地统计学 |
A Study of Soil Nutrients of Paddy with Co-kriging Method Based on SPOT5 |
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| ZHUJin-xia,XUHong-wei,ZHOUBin,GAOYu-rong. A Study of Soil Nutrients of Paddy with Co-kriging Method Based on SPOT5[J]. Chinese Journal of Soil Science, 2008, 0(6) |
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| Authors: | ZHUJin-xia XUHong-wei ZHOUBin GAOYu-rong |
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| Abstract: | Taking a paddy field with 3.34 hm2 in huzhou County as the study area, the spatial distribution of soil total N was obtained using the method of co-kriging combined vegetation index, based on the software of Arcview and ERDAS image 8.4. The results showed that the NDVI calculated from spot5 reflected the status of paddy development, and further reflected soil nutrients, especially soil total N. RVI (ratio vegetation index) and NDVI (normalized vegetation index) as the co-factors could acquire the interpolation results. |
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| Keywords: | Kriging method GIS Geoestatisitics Spatial variability |
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