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Estimate of Mineralized Organic Nitrogen in Soil Using Nitrogen Balances and Determining Available Nitrogen by the Electro-ultrafiltration Technique. Application to Mediterranean Climate Soils

AuthorsSánchez, L.; Díez López, José Antonio ; Vallejo, A.; Cartagena, Maria C.; Polo, Alfredo
KeywordsN balance
N mineralization
Available N
Issue Date11-Apr-1998
PublisherAmerican Chemical Society
CitationJournal of Agricultural and Food Chemistry 46 (5): 2036–2043 (1998)
AbstractTo be able to optimize the nitrogenous fertilizer rate applied to agricultural crops, the soil's available N must be known, particularly that provided by the organic matter's N mineralization. The methodology proposed to achieve this aim is based on determining the soil's mineral N balance. Many parameters were controlled in this endeavor:  mineral N content at three depths (0−30, 30−70, and 70−140 cm), crop absorbed N, leached N and the soil's moisture content. A mineral N balance was established for two types of crop with different cycles:  winter cereal (wheat) and spring−summer cereal (maize). Two irrigation systems were also compared. This method enabled the mineralized N to be accurately estimated. It likewise enabled a formula for estimating available N based on the EUF technique.
Description8 páginas, 1 figura y 7 tablas estadísticas
Publisher version (URL)http://dx.doi.org/ 10.1021/jf970836u
Appears in Collections:(ICA) Artículos
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