SOME EFFECTS OF MOISTURE AND TEMPERATURE ON TRANSFORMATION OF MONOCALCIUM PHOSPHATE IN SOIL
[摘要] Pre-weighedmonocalciumphosphatepellets,containingabout15milligramsofP,wereplacedin200gramsofsoilandstoredfor2weeksatfourmoisturetensionsandthreetemperatures.Pelletresidueswerethenremovedandtheamountofphosphorusremainingwasdetermined.Smallcorescontainingpelletresiduesandthesurroundingsoilcontactedbyfertilizersolutionwereremovedfordeterminationofwater-solubleandtotalinorganicP.Phosphatephasespresentatthegranulesitesandthesurroundingsoilwereidentifiedbytheiropticalproperties.Themeanamountofphosphorusremainingatthegranulesiteswas20.2percent.Althoughbothmoisturetensionandtemperaturesignificantlyaffectedthequantityofphosphorusretained,noconsistenttrendwasapparent.Residuesremainingatthesiteofapplicationwerefoundtobemixturesofanhydrousanddihydrateddicalciumphosphate,withthelatterpredominating.Moisturetensionandtemperaturedidnotgreatlyaltertheproportionofthetwophases.P...
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[效力级别] [学科分类] 农业科学（综合）
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