Atividade microbiana em solos de cacaual sob a influencia do sombreamento e adubacao
This study evaluated the activity of soil microorganisms in the decomposition of the organic matter of cocoa soils. The treatments in the areas studied were: shade with application of fertilizer, shade without application of fertilizer, full sunlight with application of fertilizer, and full sunlight without application of fertilizer. The work was carried out in the experimental area of the Cacao Research Center, located at Ilhéus-Bahia-Brazil. (14 grade 47' S, 39 grade 16' W and 38 m above sea level). Microbial activity was measured by CO2 evolution and cellulose decomposition in situ. The unfertilized shaded plot showed the highest microbial activity, for soil respiration and cellulose decomposition in the upper 5 cm layer of soil. Followed by the plot under full sunlight with fertilizer. In all areas studied soil respiration was higher during the night than during the day. Cellulose decomposition was greater in the upper 5 cm layer of the soil regardless of the treatment. There was a decrease in cellulose decomposition with soil depth. This effect was correlated with a decline of nitrogen content in the subsoil
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| Format: | biblioteca |
| Language: | eng |
| Published: |
1979
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| Subjects: | SUELO, MICROORGANISMOS, SOMBRA, ABONOS, RESPIRACION, CELULOSA, MICROCLIMA, |
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