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Biossólido como substrato na produ??o de mudas de pinh?o-manso

DOI: 10.1590/S1415-43662010001200008

Keywords: oil, jatropha curcas l., sustainability.

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Abstract:

the use of sewage sludge in agriculture as an organic fertilizer nowadays is the most promising alternative for final disposal of this residue due to its sustainability. the objective of this work was to evaluate production of physic nut (jatropha curcas l.) seedlings using a substrate containing cattle manure and different concentrations of biosolid, as sources of organic matter and nutrients and the treatment of the seeds with fungicide. the treated seeds received the fungicide moncerem? pm. all the polytubes contained 40% of cattle manure and the biosolid doses were 0, 10, 20, 30 and 40%, complemented with vermiculite. the variables evaluated were: emergence on the 14th day, plant height, stem diameter, dry weight of the aerial parts and root and the accumulation of the heavy metals cd, cr, pb and ni. the seed treatment had a negative effect on the emergence on the 14th day and consequently harmed the subsequent plant growth. generally, the substrate containing 10% of biosolid presented the best results of seedling growth. regarding the heavy metals, only ni was increasingly accumulated in the plant, as the biosolid doses increased in the substrate.

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