Ciclagem de nutrientes através da liteira em floresta, capoeira e consórcios com plantas perenes.

Abstract

The circulation of nutrients in the plant-litter-ground complex do not only depends on the ecosystem in itself, but also on the external factors of it. One of these factors is the annual rainfall which has strong influence on the development of the plants with consequences in the deposition of organic matter and the nutrients cycling. It is expected that there has differences in terms of nutrients cycling between natural ecosystems and agrosystems. The present work was developed in the city of Captão Poço, Guajarina micro-region situated in the northeast of the State of Pará and had the objective to compare the nutrients litter conteut in natural ecosystems (primary forest and secondary vegetation) and agroecosystems and to evaluate the contribution of the cited nutrients storage along of one year. The results showed differences between the studied systems that it must due of the speed of splitting of the litter in the dry period of the year. It was concluded that there has more N in the litter of the forest while the P and the Mg are higher in the of brasil-nut cocoa consortium. The considerable variation in the nutrients of the litters, in the environments studied along of one year, causes fluctuations the amounts of nutrient sets.