Normal view MARC view ISBD view

Decomposition and nutrient release from green manures in a tropical hillside agro-ecosystem Abstracts

by Cobo, J.G; Barrios, E; Kass, D; Thomas, R; American Society of Agronomy, Madison, Wis. (EUA); 1999 Annual Meeting Abstracts Salt Lake City, Utah (EUA) 31 Oct - 4 Nov 1999.
Publisher: Utah (EUA) [2000]Description: p. 240.Subject(s): TITHONIA DIVERSIFOLIA | MUCUNA DEERINGIANA | ABONOS VERDES | NUTRIENTES | ABONOS ORGANICOS | DEGRADACION | BIOFERTILIZANTES | TERRENO EN DECLIVE | AGROECOSISTEMAS | TITHONIA DIVERSIFOLIA | MUCUNA DEERINGIANA | GREEN MANURES | NUTRIENTS | ORGANIC FERTILIZERS | DEGRADATION | BIOFERTILIZERS | SLOPING LAND | AGROECOSYSTEMS | TITHONIA DIVERSIFOLIA | MUCUNA DEERINGIANA | ENGRAIS VERT | SUBSTANCE NUTRITIVE | ENGRAIS ORGANIQUE | DEGRADATION | BIOFERTILISANT | TERRE EN PENTE | AGROECOSYSTEME | INDIGOFERA CONSTRICTASummary: The potential of eight green manures as bio-fertilizers was evaluated in a tropical hillside agro-ecosystem using litter bags. Leaves from all green manure species, and stems and a mixture of leaves + stems from two of the green manures were packed in nylon mesh bags and applied at a rate of 3.3 ton ha-1. Litter bags were placed on the soil recently planted to maize. Changes in green manure dry mass, N and P followed negative exponential patterns over the 20 weeks duration of the experiment. Loss of dry mass was higher in Indigofera constricta (IND) and Tithonia diversifolia. N release rates were higher in IND and the mixture (leaves + stems) of this plant. P release rates were higher in stems of IND and leaves of Mucuna deerengianum. Overestimation of nutrient release could result when using rates derived from green manure leaves since the common practice is applying green manures as a mixture of leaves and stems. Significant correlations were found between a number of plant tissue quality measurements and decomposition, N and P release rates.
    average rating: 0.0 (0 votes)
No physical items for this record

The potential of eight green manures as bio-fertilizers was evaluated in a tropical hillside agro-ecosystem using litter bags. Leaves from all green manure species, and stems and a mixture of leaves + stems from two of the green manures were packed in nylon mesh bags and applied at a rate of 3.3 ton ha-1. Litter bags were placed on the soil recently planted to maize. Changes in green manure dry mass, N and P followed negative exponential patterns over the 20 weeks duration of the experiment. Loss of dry mass was higher in Indigofera constricta (IND) and Tithonia diversifolia. N release rates were higher in IND and the mixture (leaves + stems) of this plant. P release rates were higher in stems of IND and leaves of Mucuna deerengianum. Overestimation of nutrient release could result when using rates derived from green manure leaves since the common practice is applying green manures as a mixture of leaves and stems. Significant correlations were found between a number of plant tissue quality measurements and decomposition, N and P release rates.

Click on an image to view it in the image viewer