NUTRIENTS AND BIOLOGICAL DYNAMICCS IN AN ULTISOL WITH DIFFERENT VEGETABLE COVERAGE. CALABACITO, PANAMA. 1990-1996.
The biomass and microbial activity were evaluated in an acid soil, Typic Plinthudult, handled with different vegetable coverage. It was determined the influence of the soil coverage over the macro and micronutrients dynamics in Calabacito Farm Station, Veraguas, Panama. The vegetable coverage evaluated were as follows: Native grasses (Ng); main component Andropogon bicornis; Bracharia humidicola CIAT 679 associated to Arachis pintoi CIAT 18744 (Bh + Ap); Bracharia humidicola CIAT 679 associated to Acacia mangium (Wild) (Bh + Am); Bracharia humidicola CIAT 679 where the Acacia mangium was cutted and the wood retired (Bh + Am cut); Bracharia humidicola CIAT 679 associated to Arachis pintoi CIAT 18744 and Acacia mangium (Wild) (Bh + Ap + Am) and Bracharia humidicola CIAT 679 only (Bh only). The experimental design was a Completely Randomized applied in the laboratory with four replications by treatments. The microbial biomass was determined using the fumigation-extraction methodology; that is effective in acid soils. It was determined the percentage of absorption of phosphorus potassium, copper, manganese and zinc in the soil of the compared plots. The experimental results show a correlation between activity and microbial biomass indicating that they are highly dependent. The association Bh + Ap supports to the soil with high concentration of nutrients, and favours the soil's recovery and microbial life. Its adaptability to acid degraded soils benefits its recovery. The percentage of absorption of phosphorous, potassium and micronutrients are lower in the soil that show higher organic matter accumulation and higher microbial biomass (association Bh + Am cut and Bh + Ap + Am).
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Instituto de Innovación Agropecuaria de Panamá
2003
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| Online Access: | http://www.revistacienciaagropecuaria.ac.pa/index.php/ciencia-agropecuaria/article/view/333 |
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