Modelling N mineralization from green manure and farmyard manure from a laboratory incubation study

M. Mohanty, K. Sammi Reddy, M.E. Probert, R.C. Dalal, A. Subba Rao and N.W. Menzies

Ecological Modelling, 2011, vol. 222, issue 3, 719-726

Abstract: Predicting N mineralization from organic manures like farmyard manure (FYM) is more difficult than from fresh organic materials like crop residues, as the manures vary greatly in composition. A laboratory incubation experiment was carried out for 98 days at 30°C under aerobic conditions to study the effects on N dynamics of Gliricidia (Gliricidia sepium, Jacquin) and FYM application to soil at 5 and 10gkg−1. Application of Gliricidia induced N mineralization from the start of incubation period, with the amount of N mineralized increasing with rate of application. In contrast, application of FYM resulted in immobilization of mineral N in soil, irrespective of the rate of application. The initial net immobilization from FYM was limited by availability of N in the soil for the higher rate of application.

Keywords: Farmyard manure; Gliricidia; Nitrogen; Mineralization/immobilization; Modelling; APSIM (search for similar items in EconPapers)
Date: 2011
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:ecomod:v:222:y:2011:i:3:p:719-726

DOI: 10.1016/j.ecolmodel.2010.10.027

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