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Nitrogen Mineralization of Seven Multipurpose Tree Green Manures: Rates, Patterns and Residual Effects on Soil N Mineralization

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Title:Nitrogen Mineralization of Seven Multipurpose Tree Green Manures: Rates, Patterns and Residual Effects on Soil N Mineralization
Authors:Oglesby, Karen Allison
Date Issued:1990
Abstract:Green manure management is believed to play an important role in the "success" of alleycropping practices. However, studies that look at this do not include twigs, involve artificial pre-treatments of the material and are usually limited to one or two popular multipurpose trees. The research described in these chapters had the following objectives: (1) compare the "litterbag" and the "buried bag" methods for estimating N release, (2) compare nitrogen mineralization rates from seven different green manures, (3) examine the relationship between green manure quality and cumulative N mineralized, (4) test whether the first-order kinetic model is adequate as an empirical predictor of N release from a mixture of leguminous leaves and twigs and (5) compare soil N mineralization when green manure residue is present and absent. Green manure nitrogen was mineralized in a complex pattern. Soil N mineralization rates were slower in soil with 11 and 19-week-old mulch residue than in soil where the residue had been removed.
URI:http://hdl.handle.net/10125/56381
Appears in Collections: M.S. - Agronomy and Soil Science


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