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|標題:||Delineation and Characterization of Site-Specific Management Zone for Paddy Rice Fields
|作者:||申雍||關鍵字:||應用研究;Remote Sensing;農業化學類;遙感探測;精準農業;定址管理;水稻;Precision Agriculture;Site-Specific Management;Rice||摘要:||
Site-specific soil and crop management (SSCM) can increase the efficiency and efficacyof fertilization, which in turn reduce the pollution to the environment due to over fertilization.However, characterizing and classifying the soil limiting factors and delineating fieldmanagement zones are prerequisites for applying the SSCM farming system. In Taiwan,paddy rice fields were mainly distributed at Taoyang terrace, and in the alluvial plainsextended from Taichung to Chiayi. However, the spatial scale of traditional soil survey mapswas inadequate for practicing the SSCM. A 2-years pilot study, through remote sensedmultiyear yield information, spatiotemporal trend maps of yield classification weredetermined for a 200ha paddy rice fields under conventional two-cropping system in centralTaiwan. Soil and plant samples were collected from areas of different yield classes. Throughstatistical analysis and interpretations based on the observed differences in soil characteristicsand rice yield component performances, soil limiting factors were identified and fieldmanagement maps were proposed accordingly. Therefore, the main purposes of this study areto apply the developed remote sensing technique, in association with traditional soil and plantanalysis techniques, to characterize and classify the soil limiting factors, and to delineate thefield management zones for applying the SSCM farming system. Three major rice grownareas in Taiwan of different soil characteristics will be covered in this 3-years study, i.e. theOxisols and Ultisols in Taoyang, Alfisols in Chunghwa, and Inceptisols and Entisols in Chiayiarea. The spatiotemporal trend maps of yield classification in these three areas will bedetermined from yield maps, derived from historical satellite images, during the first year ofstudy, and serve as the basis for further analysis. Soil and plant samples will be collected fromareas of different yield classes in each region, and analyzed in the laboratory to provide therequired soil and plant information during the second year. Soil limiting factors will then beidentified through statistical analysis and interpretations based on the observed differences insoil characteristics and rice yield component performances, and with field management zonesdelineated accordingly in the third year. It is believed that the systematic approach developedin this study has the potential to expedite the work of identification and characterization of theyield limiting factors in other paddy rice grown areas. It is not only more cost effective andtime efficient than traditional techniques, but also provides more integrated view regardingthe yield spatial heterogeneity in the fields.
|Appears in Collections:||土壤環境科學系|
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