https://scholars.lib.ntu.edu.tw/handle/123456789/298789
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.author | Juang, K.-W. | en_US |
dc.contributor.author | Liou, D.-C. | en_US |
dc.contributor.author | DAR-YUAN LEE | en_US |
dc.creator | Juang, K.-W.; Liou, D.-C.; Lee, D.-Y. | en |
dc.date.accessioned | 2018-09-10T04:14:15Z | - |
dc.date.available | 2018-09-10T04:14:15Z | - |
dc.date.issued | 2002 | - |
dc.identifier.uri | http://www.scopus.com/inward/record.url?eid=2-s2.0-0036628883&partnerID=MN8TOARS | - |
dc.identifier.uri | http://scholars.lib.ntu.edu.tw/handle/123456789/298789 | - |
dc.description.abstract | Site-specific phosphorus management is done to optimize crop production and minimize P loss from soils. The spatial variability of the available P prior to fertilizer application and the P-fixation tendency of soil both need to be taken into account for variable-rate P application. The objectives of this research were to document the spatial variability of the fertilizer-P availability index, which shows the P-fixation tendency, and to develop a strategy that takes the spatial distribution of this index into account for site-specific phosphorus application. In this study, the spatial patterns of the fertilizer-P availability index were characterized by using geostatistics. The ordinary kriging was used for spatial interpolation of the fertilizer-P availability index. Because the fertilizer-P availability index of soil is related to oxalateextractable Fe and Al and because measuring oxalate-extractable Fe and Al is much easier than directly determining the fertilizer-P availability index, the spatial distribution of the fertilizer-P availability index can be obtained using the oxalate-extractable Fe and Al data. The spatial distribution of Olsen-extractable P, which was used to measure the available-P status prior to fertilizer-P application, was also estimated by using ordinary kriging. The required fertilizer-P amounts were then determined using the kriging estimates of the fertilizer-P availability index and Olsen-extractable P. A fertilizer-P recommendation map for the 430-ha study site in Changhua county, Taiwan was generated by using this approach for illustration. The proposed method for generating fertilizer-P recommendation maps can be used for variable-rate application to maintain an adequate P status for crop production and to potentially reduce the P loss from soils. | - |
dc.language | en | en |
dc.relation.ispartof | Journal of Environmental Quality | en_US |
dc.source | AH-Scopus to ORCID | - |
dc.subject.classification | [SDGs]SDG2 | - |
dc.subject.other | Cultivation; Interpolation; Soils; Spatial distribution; Phosphate fertilizers; fertilizer; phosphorus; phosphorus; article; crop production; environmental impact assessment; extraction; geostatistical analysis; linear system; regression analysis; research; sampling; soil analysis; soil fertility; agriculture; bioavailability; chemistry; metabolism; microbiology; soil; soil pollutant; Agriculture; Biological Availability; Fertilizers; Phosphorus; Soil; Soil Microbiology; Soil Pollutants | - |
dc.title | Site-specific phosphorus application based on the kriging fertilizer-phosphorus availability index of soils | - |
dc.type | journal article | en |
dc.identifier.doi | 10.2134/jeq2002.1248 | - |
dc.identifier.scopus | 2-s2.0-0036628883 | - |
dc.identifier.isi | WOS:000176918200021 | - |
dc.relation.pages | 1248-1255 | - |
dc.relation.journalvolume | 31 | - |
dc.relation.journalissue | 4 | - |
item.openairetype | journal article | - |
item.fulltext | no fulltext | - |
item.openairecristype | http://purl.org/coar/resource_type/c_6501 | - |
item.grantfulltext | none | - |
item.cerifentitytype | Publications | - |
crisitem.author.dept | Agricultural Chemistry | - |
crisitem.author.orcid | 0000-0002-6915-6543 | - |
crisitem.author.parentorg | College of Bioresources and Agriculture | - |
顯示於: | 農業化學系 |
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