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- 要約等...as established in Pingbu village extending along the Yellow River (Baiyin, Gansu, China) to conduct experiments on the control of salinity and sodicity in surface-irrigated fields, and an observation system for measuring meteorological and hydrological e......ant to soil salinization and alkalization was installed in it. The outline of the observation system is shown; principles of measuring such elements are examined and their limitations are pointed out in case of necessity. Furthermore, careful considerations are given to the system so that the system could measure such ele...
- 標準番号（その他）https://hdl.handle.net/2324/10101
- 件名biological reclamation irrigation salinity soil physical reclamation sodicity TDR Geo-Environment Science 地水環境学
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- 要約等In order to analyze the state of salinization and alkalization in and around an expe......ly established in an alluvial valley of the Yellow Ricer, concentrations of ions contained in waters, soils and crops relevant to these phenomena were measured there. During the intensive surveys conducted in June, August and September 2007, the Yellow River water, irrigation canal water, g......r, field soils and crops, etc. were sampled and their chemical cha......as electrical conductivity, pH, concentrations of ions Na^+, Ca^{2+}......l^－, SO_4^{2－} and NO_3^－ were measured. The results obtained are summariz......llows: Irrigation seems to cause increases in t...
- 件名ion concentration irrigated field root uptake salinity sodicity Geo-Environment Science 地水環境学
- 関連情報Journal of the Faculty of Agriculture, K......shu University || 53(1) || p265-270 九州大学大学院農学研究院紀要 || 53(1) || p265-270 http:......kyushu-u.ac.jp/index.html
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- 要約等Salinity is an ever-present hazard in irrigation agriculture. In order to conduct experiments on the control of salinity and sodicity in surface-irrigated fiel......stablished at Pingbu village (Baiyin, Gansu, China) located in an alluvial valley of the Yellow River in September 2007. The background to and the objectives and methodology of the experiments are described, and the natural condition of the study area and the fundamental knowledge and information on this subject are summarized.
- 標準番号（その他）https://hdl.handle.net/2324/10100
- 件名irrigation leaching reclamation salinity sodicity Yellow River Geo-Environment Science 地水環境学
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- 要約等The electrical conductivity of the solution in a saturated so......which is determined by the dilution extraction (DE) method, is used in these experiments. The DE method is based on a regression equation of the electrical conductivity of the extract of the soil sample at...... ratio, EC1:x, on x. The ECSAT can also......utomatically using time domain reflectometry (TDR) in the field, when the parameters of two models hav......identified for the soil concerned. The concentrations of exchangeable ions, such as Na+, in the solution in a saturated so...... used as well. They are also determined by the DE method. The physical pr...
- 件名dilution extraction method electrical conductivity irrigation ion concentration TDR Geo-Environment Science 地水環境学
- 関連情報Journal of the Faculty of Agriculture, K......shu University || 53(2) || p535-541 九州大学大学院農学研究院紀要 || 53(2) || p535-541 http://www.agr.kyush...